Monitoring method and system and related apparatus

Abstract

Disclosed in the present application are a monitoring method and system and a related apparatus, which are applied to a first electronic device. The first electronic device is provided with a first circuit. The first circuit comprises a first electrode, a second electrode, a third electrode, a fourth electrode, an excitation current generation unit, and a voltage measurement unit. A first instruction is received, and in response to the first instruction, the first circuit determines that the first electrode and the second electrode are in good contact with the skin. The first circuit determines first information, the first electrode is in contact with a first position of the skin of a user, the second electrode is in contact with a second position of the skin of the user, and the first position and the second position are located at two ends of a thoracic tissue, respectively. The first information is output, and the first information comprises one or more of a cardiac output, a stroke volume, a heart rate, an ejection fraction, and a cardiac function judgment result. In this way, the cardiac function condition of the user can be monitored in real time, so that the user can be monitored anytime and anywhere.

Description

A monitoring method, system and related device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 19, 2023, with application number 202311766418.9 and application name “A Monitoring Method, System and Related Devices”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of electronic technology, and in particular to a monitoring method, system and related devices. Background Art

[0003] With the continuous development of electronic technology, electronic devices are becoming increasingly integrated into daily life, and more and more electronic devices are equipped with health monitoring functions. Cardiac function monitoring is an important branch of health monitoring.

[0004] When cardiac function monitoring is needed, the hospital can monitor the user's cardiac function through medical equipment such as echocardiography or cardiac impedance hemodynamic monitors, and judge the user's cardiac function status based on the monitoring results.

[0005] However, medical equipment is not convenient for users to carry around, and the above method cannot obtain the results of cardiac function monitoring in real time. Summary of the Invention

[0006] The present application provides a monitoring method, system and related devices, which realize real-time acquisition of the user's cardiac function monitoring results, so that the user can understand his or her own health status in a timely manner.

[0007] In a first aspect, the present application provides a monitoring method, which is applied to a first electronic device, wherein the first electronic device is provided with a first circuit, wherein the first circuit includes a first electrode, a second electrode, a third electrode, a fourth electrode, an excitation current generating unit, and a voltage measuring unit; the method includes: receiving a first instruction, wherein the first instruction is used to instruct the first electronic device to turn on cardiac function monitoring; in response to the first instruction, determining through a first circuit that the first electrode is in good contact with the skin, wherein the first circuit includes the first electrode, the excitation current generating unit, and the third electrode; determining through a second circuit that the second electrode is in good contact with the skin, wherein the second circuit includes the second electrode, the excitation current generating unit, and the fourth electrode; determining through a third circuit that the first information is in good contact with the skin, wherein the third circuit includes the second electrode, the excitation current generating unit, and the fourth electrode; The circuit includes a first electrode, an excitation current generating unit, a voltage measuring unit and a second electrode; the first electrode contacts a first position of the user's skin, and the second electrode contacts a second position of the user's skin, and the first position and the second position are respectively located at the two ends of the chest tissue; first information is output, and the first information includes one or more of the following: cardiac output, stroke volume, heart rate, ejection fraction, comprehensive result, first result, second result, third result and fourth result, the comprehensive result is used to indicate whether the user's heart function is normal, the first result is used to indicate whether the cardiac output is normal, the second result is used to indicate whether the stroke volume is normal, the third result is used to indicate whether the heart rate is normal, and the fourth result is used to indicate whether the ejection fraction is normal.

[0008] The first circuit may be the monitoring circuit in any one of the following second aspects.

[0009] In this way, the first electronic device can obtain the user's cardiac function monitoring results in real time, which helps the user to understand their health status in a timely manner. In addition, the first electronic device can also determine whether the electrodes are in good contact with the user's skin.

[0010] In a possible implementation, receiving the first instruction specifically includes: receiving the first instruction sent by the second electronic device; or receiving a first operation of the user on the first electronic device to generate the first instruction.

[0011] In this way, the first electronic device can start cardiac function monitoring in response to the user's operation or in response to instructions sent by other electronic devices.

[0012] In a possible implementation, the method further includes: outputting a first prompt in response to the first instruction, where the first prompt is used to prompt the user to start monitoring cardiac function.

[0013] In this way, the first electronic device can remind the user whether cardiac function monitoring is turned on through the first prompt.

[0014] In one possible implementation, before determining the first information through the third loop, the method also includes: determining that the user state is the first state; determining the first information through the third loop, specifically including: determining a cardiac function index through the third loop, the cardiac function index including any one or more of the following: cardiac output, stroke volume, heart rate, ejection fraction; determining the first information based on the first state and the cardiac function index.

[0015] In this way, the first electronic device can obtain the user status in real time and determine whether the user's cardiac function index is normal based on the user status.

[0016] In a possible implementation, the first state is a motion state, a resting state, or a sleeping state.

[0017] In another possible implementation, the first state may also include, but is not limited to, any one or more of the following: a frightened state, an oxygen-deficient state, a diving state, a meditative state, etc.

[0018] In one possible implementation, determining that the user status is the first status specifically includes: detecting that the user status is the first status; or, receiving and responding to the user's operation of setting the status, determining that the user status is the first status; or, receiving second information sent by a second electronic device, and determining that the user status is the first status based on the second information.

[0019] In this way, the first electronic device can determine the user status based on the user's operation of setting the status, or can determine the user status based on information sent by other electronic devices. The first electronic device can also detect the user status through devices such as sensors.

[0020] In a possible implementation, when the first state is an exercise state, the first information further includes a first graph, and the first graph is used to indicate the relationship between stroke volume and exercise heart rate.

[0021] In this way, when the user is in a state of exercise, the first electronic device can output a first graphic to prompt the user of the relationship between stroke volume and exercise heart rate.

[0022] In a possible implementation, outputting the first information specifically includes: sending a second instruction to the second electronic device, where the second instruction is used to instruct the first electronic device to output the first information.

[0023] In this way, the first electronic device can also output the first information through the second electronic device.

[0024] In a possible implementation, the first electronic device is a headset, and the method further includes: before receiving the first instruction, the headset plays the first audio; when receiving the first instruction, pausing the playing of the first audio.

[0025] In one possible implementation, the first electronic device is an earphone, and playing the first audio specifically includes: playing the first audio at a first volume; outputting the first information specifically includes: if the user wears the left earphone or the right earphone, playing the first information at the first volume.

[0026] In a possible implementation, the first electronic device is an earphone, and the method further includes: if the user is not wearing the left earphone and the right earphone, playing the first information at a second volume, the second volume being greater than the first volume.

[0027] In this way, when the first electronic device is a headset, the first electronic device can determine the output volume of the first information based on whether the user is wearing the headset.

[0028] In one possible implementation, the first electronic device is an earphone, and outputting the first information specifically includes: if the user is not wearing the left earphone and the right earphone, sending a second instruction to the second electronic device, the second instruction being used to instruct the first electronic device to output the first information.

[0029] In this way, when the first electronic device is a headset, the first electronic device can determine whether to output the first information through the second electronic device based on whether the user is wearing the headset.

[0030] In one possible implementation, the first electronic device is an earphone, which includes a left earphone and a right earphone. There is a wired connection between the left earphone and the right earphone, and the left earphone is provided with a first electrode and a third electrode, and the right earphone is provided with a second electrode and a fourth electrode.

[0031] In one possible implementation, the first electronic device is a wearable device, which includes a movement and a strap. The first electrode and the third electrode are located at one end of the strap, and the second electrode and the fourth electrode are located at the other end of the strap. The length of the strap is greater than the first length.

[0032] In one possible implementation, the first electronic device is a wearable device, which includes a movement and a strap, the movement includes a first button and a second button, the first electrode and the third electrode are located on the back of the movement, the second electrode is located on the first button, and the fourth electrode is located on the second button.

[0033] In one possible implementation, the first electronic device is a wearable device, the wearable device includes a movement and a strap, the movement includes a first button and a second button, the first electrode and the third electrode are located on the strap, the second electrode is located on the first button, and the fourth electrode is located on the second button.

[0034] In one possible implementation, the first electronic device is a mobile phone, which includes one or more buttons, and one or more of the first electrode, the second electrode, the third electrode, and the fourth electrode are set on the one or more buttons, and the first electrode, the second electrode, the third electrode, and the fourth electrode do not contact each other.

[0035] In one possible implementation, one or more buttons of the mobile phone include a volume button and a fingerprint button, and one or more of the first electrode, the second electrode, the third electrode and the fourth electrode are set on the one or more buttons, specifically including: the first electrode and the third electrode are set on the volume button, and the second electrode and the fourth electrode are set on the fingerprint key.

[0036] In one possible implementation, one or more buttons of the mobile phone include a first volume button, a second volume button and a fingerprint button, and one or more of the first electrode, the second electrode, the third electrode and the fourth electrode are set on the one or more buttons, specifically including: the first electrode is set on the first volume button, the third electrode is set on the second volume button, and the second electrode and the fourth electrode are set on the fingerprint key.

[0037] In this way, when the first electronic device has different device forms, the electrodes can be set at different positions.

[0038] In the second aspect, the present application provides a monitoring circuit, comprising: a first electrode, a second electrode, a third electrode, a fourth electrode, a first analog switch, a second analog switch, an excitation current generating unit and a voltage measuring unit; the first analog switch comprises a first port and a second port, and the second analog switch comprises a third port and a fourth port; the first electrode is connected to the second electrode through the first port of the first analog switch, the excitation current generating unit and the third port of the second analog switch; the third electrode is connected to the fourth electrode through the fourth port of the second analog switch, the excitation current generating unit and the second port of the first analog switch; the voltage measuring unit is connected to the third electrode and the fourth electrode, or the voltage measuring unit is connected to the first electrode and the second electrode; when the first electrode contacts the first position of the user's skin, the second electrode contacts the second position of the user's skin, and the first position and the second position are respectively located at the two ends of the chest tissue, the excitation current generating unit is used to generate a current flowing through the user's heart, and the voltage measuring unit is used to measure the voltage at both ends of the user's heart.

[0039] In this way, the voltage across the user's heart and the current flowing through the user's heart can be obtained in real time through the monitoring circuit, thereby determining the user's cardiac impedance and obtaining the user's cardiac function monitoring results.

[0040] In one possible implementation, the first electrode is connected to the second electrode through the first port of the first analog switch, the excitation current generating unit and the third port of the second analog switch, specifically including: the first electrode, the first analog switch, the excitation current generating unit, the second analog switch and the second electrode are connected in sequence, and the first electrode is connected to the first port of the first analog switch, and the second electrode is connected to the third port of the second analog switch; the third electrode is connected to the second electrode through the fourth port of the second analog switch, the excitation current generating unit and the second port of the first analog switch, specifically including: the third electrode, the second analog switch, the excitation current generating unit, the first analog switch and the fourth electrode are connected in sequence, and the third electrode is connected to the fourth port of the second analog switch, and the fourth electrode is connected to the second port of the first analog switch.

[0041] In a possible implementation, the excitation current generating unit is connected to the first analog switch and the second analog switch.

[0042] In a possible implementation, the first analog switch is used to connect the first port or the second port; and the second analog switch is used to connect the third port or the fourth port.

[0043] It should be noted that the first analog switch and the second analog switch may not be connected to any port.

[0044] In one possible implementation, the excitation current generating unit is used to generate a current flowing through the user's heart, and the voltage measuring unit is used to measure the voltage across the user's heart, specifically including: when the first analog switch is connected to the first port and the second analog switch is connected to the third port, the excitation current generating unit is used to generate a current flowing through the user's heart, and the voltage measuring unit is used to measure the voltage across the user's heart; or, when the first analog switch is connected to the second port and the second analog switch is connected to the fourth port, the excitation current generating unit is used to generate a current flowing through the user's heart, and the voltage measuring unit is used to measure the voltage across the user's heart.

[0045] In a possible implementation, when the first analog switch is connected to the first port and the second analog switch is connected to the fourth port, the monitoring circuit is used to determine whether the first electrode and the third electrode are in good contact with the skin.

[0046] In a possible implementation, when the first analog switch is connected to the second port and the second analog switch is connected to the third port, the monitoring circuit is used to determine whether the second electrode and the fourth electrode are in good contact with the skin.

[0047] In one possible implementation, when the first analog switch is connected to the first port and the second analog switch is connected to the fourth port, or when the first analog switch is connected to the second port and the second analog switch is connected to the third port, the current frequency generated by the excitation current generating unit is less than the first frequency.

[0048] In a possible implementation, the current frequency generated by the excitation current generating unit is greater than the first frequency.

[0049] In one possible implementation, the first frequency may be 1 kilohertz (KHz).

[0050] In a third aspect, the present application provides an electronic device, which is a first electronic device, and the first electronic device includes the circuit of any one of the second aspects.

[0051] In one possible implementation, the first electronic device is an earphone, which includes a left earphone and a right earphone, the left earphone and the right earphone are connected by wire, and the left earphone is provided with a first electrode and a third electrode, and the right earphone is provided with a second electrode and a fourth electrode.

[0052] In one possible implementation, the first electronic device is a wearable device, which includes a movement and a strap. The first electrode and the third electrode are located at one end of the strap, and the second electrode and the fourth electrode are located at the other end of the strap. The length of the strap is greater than the first length.

[0053] In one possible implementation, the first electronic device is a wearable device, which includes a movement and a strap, the movement includes a first button and a second button, the first electrode and the third electrode are located on the back of the movement, the second electrode is located on the first button, and the fourth electrode is located on the second button.

[0054] In one possible implementation, the first electronic device is a wearable device, the wearable device includes a movement and a strap, the movement includes a first button and a second button, the first electrode and the third electrode are located on the strap, the second electrode is located on the first button, and the fourth electrode is located on the second button.

[0055] In one possible implementation, the first electronic device is a mobile phone, which includes one or more buttons, and one or more of the first electrode, the second electrode, the third electrode, and the fourth electrode are set on the one or more buttons, and the first electrode, the second electrode, the third electrode, and the fourth electrode do not contact each other.

[0056] In one possible implementation, one or more buttons of the mobile phone include a volume button and a fingerprint button, and one or more of the first electrode, the second electrode, the third electrode and the fourth electrode are set on the one or more buttons, specifically including: the first electrode and the third electrode are set on the volume button, and the second electrode and the fourth electrode are set on the fingerprint key.

[0057] In one possible implementation, one or more buttons of the mobile phone include a first volume button, a second volume button and a fingerprint button, and one or more of the first electrode, the second electrode, the third electrode and the fourth electrode are set on the one or more buttons, specifically including: the first electrode is set on the first volume button, the third electrode is set on the second volume button, and the second electrode and the fourth electrode are set on the fingerprint key.

[0058] In a fourth aspect, the present application provides a monitoring system, including a first electronic device and a second electronic device, where there is a wired connection between the first electronic device and the second electronic device, and the monitoring system includes the circuit in any one of the second aspects.

[0059] In this way, a monitoring circuit can be formed by multiple electronic devices to collaboratively monitor the user's cardiac function.

[0060] In a possible implementation, the first electrode and the third electrode are located in a first electronic device, and the second electrode and the fourth electrode are located in a second electronic device.

[0061] In a possible implementation, the first electronic device is a headset, and the second electronic device is a mobile phone, or the first electronic device is a mobile phone, and the second electronic device is a headset.

[0062] In a fifth aspect, the present application provides an electronic device, namely, a first electronic device, comprising one or more processors, one or more memories, and a first circuit; the first circuit comprising a first electrode, a second electrode, a third electrode, a fourth electrode, a first analog switch, a second analog switch, an excitation current generating unit, and a voltage measuring unit. The one or more memories are coupled to the one or more processors and configured to store computer program code, the computer program code comprising computer instructions. When the one or more processors execute the computer instructions, the communication device executes the monitoring method according to any possible implementation of any of the aforementioned aspects.

[0063] In the sixth aspect, the present application provides a chip system, which is applied to a first electronic device, and the chip system includes: a processing circuit and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processing circuit, and the processing circuit is used to run the code instructions so that the chip system executes the monitoring method in any possible implementation of any of the above aspects.

[0064] In a seventh aspect, an embodiment of the present application provides a readable storage medium, comprising instructions, which, when executed on a first electronic device, enable the first electronic device to execute a monitoring method in any possible implementation of any of the above aspects.

[0065] In an eighth aspect, an embodiment of the present application provides a computer program product, which, when running on a computer, enables the computer to execute the monitoring method in any possible implementation of any of the above aspects.

[0066] The beneficial effects of the third to eighth aspects can refer to the beneficial effects of the first to second aspects mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] FIG1 is a schematic diagram of the system architecture of a health monitoring system 1000 provided in an embodiment of the present application;

[0068] 2A-2C are schematic diagrams of the device configurations of three types of headphones 10 provided in an embodiment of the present application;

[0069] 3A-3E are schematic diagrams of the device configurations of three watches 20 provided in embodiments of the present application;

[0070] 4A-4B are schematic diagrams of the device configurations of two mobile phones 30 provided in embodiments of the present application;

[0071] FIG5A is a schematic diagram of the hardware structure of an electronic device 100 provided in an embodiment of the present application;

[0072] FIG5B is a schematic diagram of the structure of a monitoring circuit provided in an embodiment of the present application;

[0073] FIG5C is a schematic diagram of a current signal generated by an excitation current generating unit provided in an embodiment of the present application;

[0074] FIG5D is a schematic diagram of the structure of another monitoring circuit provided in an embodiment of the present application;

[0075] FIG5E is a circuit connection diagram of a monitoring circuit provided in an embodiment of the present application;

[0076] 5F-5H are schematic diagrams of circuit connections when the analog switch according to an embodiment of the present application is connected to different ports;

[0077] FIG6A is a schematic diagram of the positional relationship between chest tissue and the human body provided in an embodiment of the present application;

[0078] 6B-6F are schematic diagrams showing the distribution of various electrode-skin contact points provided in embodiments of the present application;

[0079] FIG7 is a schematic diagram of a flow chart of a monitoring method provided in an embodiment of the present application;

[0080] FIG8A is a schematic diagram of a process for determining cardiac function indicators based on a cardiac impedance curve according to an embodiment of the present application;

[0081] FIG8B is a schematic diagram of a cardiac impedance curve in a two-dimensional coordinate system provided in an embodiment of the present application;

[0082] FIG8C is a schematic diagram of a first-order derivative curve of a cardiac impedance curve in a two-dimensional coordinate system provided by an embodiment of the present application;

[0083] 9A-9C are schematic diagrams of a set of interfaces for outputting cardiac function indicators provided in an embodiment of the present application;

[0084] 10A-10C are schematic diagrams of another set of interfaces for outputting cardiac function indicators provided in an embodiment of the present application;

[0085] FIG11 is a flow chart of an output method for determining cardiac function indicators using an earphone 10 according to an embodiment of the present application;

[0086] FIG12A is a schematic diagram of a flow chart of another monitoring method provided in an embodiment of the present application;

[0087] 12B-12D are a set of interfaces for outputting prompts on a mobile phone 30 according to an embodiment of the present application;

[0088] FIG13 is a schematic diagram of functional modules of an electronic device 100 provided in an embodiment of the present application;

[0089] FIG14 is a schematic diagram of functional modules of a health monitoring system 1000 provided in an embodiment of the present application;

[0090] FIG15 is a schematic diagram of a physical device of an electronic device 100 provided in an embodiment of the present application;

[0091] FIG16 is a flow chart of a monitoring method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0092] The following is a clear and detailed description of the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship between related objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0093] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0094] The term "user interface (UI)" in the following embodiments of this application refers to a medium interface for interaction and information exchange between an application or operating system and a user, which realizes the conversion between the internal form of information and the form acceptable to the user. The user interface is a source code written in a specific computer language such as Java and extensible markup language (XML). The interface source code is parsed and rendered on an electronic device and finally presented as content that the user can recognize. The commonly used form of user interface is graphical user interface (GUI), which refers to a user interface related to computer operations that is displayed in a graphical manner. It can be a visual interface element such as text, icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, widgets, etc. displayed on the display screen of an electronic device.

[0095] The following introduces some professional terms involved in the embodiments of this application.

[0096] Heart rate (HR): Heart rate refers to the number of times the heart beats per minute. Each time the heart beats, it completes one contraction and one relaxation.

[0097] Cardiac output (CO): Cardiac output refers to the total amount of blood pumped by one ventricle (left or right) per minute, also known as minute output. The output of the left and right ventricles is essentially equal.

[0098] Stroke volume (SV): Stroke volume is the amount of blood ejected by one ventricle of the heart (left or right) in a single pumping stroke. The product of stroke volume and heart rate is cardiac output.

[0099] Ejection fraction: The ejection fraction is the ratio of the volume of blood pumped out with each stroke to the total amount of blood in the heart.

[0100] Human body safety current: Human body safety current refers to the minimum safe current passing through the human body. When the current passing through the human body is less than or equal to the human body safety current, the current will not cause harm to the human body.

[0101] Thoracic cavity: The thoracic cavity is a hollow space formed by the sternum, thoracic vertebrae, and ribs. It is connected to the neck at the top and separated from the abdominal cavity by the diaphragm at the bottom. Organs such as the heart and lungs are located within the thoracic cavity.

[0102] Cardiac impedance curve: The cardiac impedance curve is a curve used to characterize the relationship between cardiac impedance and time. Among them, cardiac impedance is the ratio of the voltage at both ends of the heart to the current flowing through the heart. The heart is located in the chest tissue, and the chest tissue is a conductor. The impedance of the chest tissue can also be regarded as cardiac impedance (also called cardiac impedance). Therefore, electrodes are placed on the skin at both ends of the chest tissue (such as the left and right ends, or the upper and lower ends), and a low-amplitude constant current is input into the chest tissue through the electrodes. The user's cardiac impedance curve can be determined based on the current flowing through the chest tissue and the voltage at both ends of the chest tissue. The cardiac impedance curve can be used to determine cardiac function indicators such as cardiac output and stroke volume.

[0103] Skin resistance: Skin can conduct electricity, and skin resistance is the electrical resistance of the stratum corneum on the skin's surface. In the embodiments of the present application, two electrodes can be in contact with the skin, conducting current through the skin. If the distance between the two electrodes is less than a predetermined distance (e.g., 5 cm, 3 cm, etc.), the resistance provided by the skin between the two electrodes can be referred to as skin resistance.

[0104] Body resistance: In this embodiment of the present application, two electrodes can be in contact with the skin. If the line connecting the two contact points of the two electrodes with the skin can cross the two ends of the chest tissue (for example, the upper and lower ends or the left and right ends), then the resistance provided by the human body between the two electrodes can be called body resistance. Since this part of the body includes the heart, in this embodiment of the present application, the body resistance can also be called cardiac impedance.

[0105] ECG: The heart pumps blood rhythmically, with its contraction and relaxation rhythm controlled by its electrical activity. Under normal circumstances, the sinoatrial node regularly emits impulses, which, through a specialized conduction system, generate electrical impulses throughout the myocardium. These impulses generate an electric field that permeates the body. The resulting tiny currents are conducted through body tissues to the surface, generating different electrical potentials at different locations on the surface.

[0106] ECG Measurement Principle: ECG measurement involves measuring the potential difference between different parts of the body surface using electrodes in contact with the skin. Based on the relationship between the potential difference between these parts and time, the user's electrocardiogram (ECG) is determined. As explained above, the potential difference between different parts of the user's body surface is caused by the regular impulses emitted by the sinoatrial node in the heart. Therefore, when measuring the potential difference between different parts of the body, multiple electrodes can be placed in contact with the skin at different locations on the human body, and the potential difference between these different parts can be measured using a voltage measurement unit.

[0107] The following introduces the system architecture of a health monitoring system 1000 provided in an embodiment of the present application.

[0108] As shown in FIG1 , a health monitoring system 1000 may include an electronic device 100 and an electronic device 200. The electronic device 100 may be provided with a monitoring circuit, which may include multiple electrodes. When the multiple electrodes are in contact with designated locations on the user's skin, the electronic device 100 may determine the user's cardiac impedance curve through the monitoring circuit. The cardiac impedance curve may be used to determine the user's cardiac function indicators. The cardiac function indicators may include cardiac output and stroke volume, and optionally, may also include heart rate.

[0109] In some embodiments, after determining the cardiac impedance curve of the user, the electronic device 100 may determine and output the user's cardiac function index based on the user's cardiac impedance curve. After determining the cardiac function index, the electronic device 100 may output the cardiac function index. In some embodiments, the electronic device 100 may establish a communication connection with the electronic device 200, and the communication connection may be a wired communication connection or a wireless communication connection. The wireless communication connection may be a wireless communication connection established by the electronic device 100 and the electronic device 200 using any one of wireless communication technologies such as wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (IR), and NearLink. In this case, the electronic device 100 outputs the cardiac function index, which may refer to sending an output instruction 1 to the electronic device 200. The output instruction 1 may include the cardiac function index, and the output instruction 1 is used to instruct the electronic device 200 to output the cardiac function index.

[0110] In other embodiments, when electronic device 100 establishes a communication connection with electronic device 200, after determining the user's cardiac impedance curve, electronic device 100 may also send the cardiac impedance curve to electronic device 200. Electronic device 200 may determine the user's cardiac function index based on the cardiac impedance curve sent by electronic device 100. Electronic device 200 may then output the cardiac function index or send output instruction 2 to electronic device 100. Output instruction 2 may include the cardiac function index and may be used to instruct electronic device 100 to display the cardiac function index.

[0111] In health monitoring system 1000, electronic device 100 can be the headset shown in FIG1 , or a wearable device such as a watch or bracelet, or an electronic device such as a mobile phone or tablet computer. Electronic device 200 can be the mobile phone shown in FIG1 , or a wearable device such as a watch or bracelet, or an electronic device such as a tablet computer, and this application does not limit this.

[0112] It is understandable that the health monitoring system 1000 shown in FIG1 is only an example. In the embodiments of the present application, the health monitoring system 1000 may also include more, fewer, or different electronic devices from the above embodiments, and the present application does not limit this.

[0113] The following describes schematic diagrams of various electronic devices 100 provided in embodiments of the present application.

[0114] In some application scenarios, the electronic device 100 may be an earphone 10. Figures 2A to 2C show schematic diagrams of three types of earphones 10 provided in embodiments of the present application.

[0115] Exemplarily, the earphone 10 may be a Bluetooth earphone as shown in FIG. 2A below.

[0116] As shown in FIG2A , the earphone 10 may include a left earphone 11 and a right earphone 12. A wired connection may be provided between the left earphone 11 and the right earphone 12. The wired connection may be implemented by a connecting wire (e.g., an electrical connecting wire) as shown in FIG2A . It should be noted that the connecting wire between the left earphone 11 and the right earphone 12 may be used to conduct current.

[0117] The surface of the left earphone 11 may be provided with one or more electrodes, such as electrode 1. When the user wears the left earphone 11 on the left ear, electrode 1 may contact the user's skin. Similarly, the surface of the right earphone 12 may also be provided with one or more electrodes, such as electrode 2. When the user wears the right earphone 12 on the right ear, electrode 2 may contact the user's skin. In some embodiments, electrode 3 may also be provided on the surface of the left earphone 11, and electrode 4 may also be provided on the surface of the right earphone 12. Specifically, on the left earphone 11, electrode 3 and electrode 1 do not contact each other, and when the user wears the left earphone 11 on the left ear, electrode 3 may also contact the user's skin; on the right earphone 12, electrode 4 and electrode 2 do not contact each other, and when the user wears the right earphone 12 on the right ear, electrode 4 may also contact the user's skin.

[0118] The earphone 10 may further include an excitation current generating unit, a voltage measuring unit, and one or more analog switches (e.g., analog switch S1 and analog switch S2). The excitation current generating unit and the voltage measuring unit may be disposed inside the earphone 10, and the one or more analog switches may also be disposed inside the earphone 10 or configured as mechanical switches visible from the outside of the earphone 10. For example, in the embodiment shown in FIG2A , the excitation current generating unit and the analog switch S1 may be disposed inside the left earphone 11, and the voltage measuring unit and the analog switch S2 may be disposed inside the right earphone 12.

[0119] It can be understood that the embodiment shown in Figure 2A is only an example. In the embodiment of the present application, circuit components such as the excitation current generating unit, the voltage measuring unit, and the analog switch can also be set at other locations inside the earphone 10, or the analog switch can be set as a mechanical switch on the surface of the earphone 10, etc. This application does not limit this.

[0120] As another example, the earphone 10 may also be a Bluetooth earphone as shown in FIG. 2B below.

[0121] As shown in Figure 2B, the earphone 10 may include a left earphone 11 and a right earphone 12, and there is a wired connection between the left earphone 11 and the right earphone 12, and the wired connection can be achieved by the connecting bracket shown in Figure 2B. It should be noted that the connecting bracket between the left earphone 11 and the right earphone 12 can be used to conduct current. Compared with the connecting line shown in Figure 2A, the connecting bracket has a certain supporting capacity, and the supporting capacity of the connecting bracket can enable the connecting bracket to maintain a specific shape (for example, an arc). In some embodiments, the connecting bracket may also have a certain deformation ability, for example, the connecting bracket can be unfolded into a straight shape.

[0122] In the earphone 10 shown in FIG2B , the surfaces of the left earphone 11 and the right earphone 12 may also be provided with one or more electrodes (e.g., electrode 1, electrode 2, electrode 3, and electrode 4, etc.), and the distribution of the electrodes may refer to the relevant description of the embodiment shown in FIG2A above. Furthermore, the earphone 10 shown in FIG2B may also include circuit components such as an excitation current generating unit, a voltage measuring unit, and one or more analog switches (e.g., analog switch S1 and analog switch S2), and the positions of these multiple circuit components may also refer to the relevant description of the embodiment shown in FIG2A above.

[0123] As another example, the earphone 10 may also be a wired earphone as shown in FIG. 2C below.

[0124] As shown in FIG2C , the earphone 10 may include a left earphone 11, a right earphone 12, and a connecting cable 13. The connecting cable 13 is a multi-terminal connecting cable having three ports, two of which may be connected to the left earphone 11 and the right earphone 12, respectively. The remaining port may be left vacant or may be connected to another electronic device (e.g., a mobile phone, tablet computer, etc.). It should be noted that the connecting cable 13 may be used to conduct current.

[0125] In the earphone 10 shown in FIG2C , the surfaces of the left earphone 11 and the right earphone 12 may also be provided with one or more electrodes (e.g., electrode 1, electrode 2, electrode 3, and electrode 4, etc.), and the distribution of the electrodes may refer to the relevant description of the embodiment shown in FIG2A above. Furthermore, the earphone 10 shown in FIG2C may also include circuit components such as an excitation current generating unit, a voltage measuring unit, and one or more analog switches (e.g., analog switch S1 and analog switch S2), and the positions of these multiple circuit components may also refer to the relevant description of the embodiment shown in FIG2A above.

[0126] It is understandable that the embodiments shown in Figures 2A to 2C are just some examples. In the embodiments of the present application, the earphones 10 may also be earmuff-type earphones or other device forms different from the above embodiments, and the present application does not limit this.

[0127] It should be noted that in the earphone 10 shown in Figures 2A to 2C above, the connecting wire or connecting bracket between the left earphone 11 and the right earphone 12 is deformable. Therefore, the distance between the left earphone 11 and the right earphone 12 is adjustable, and the distance between the electrodes on the left earphone 11 and the electrodes on the right earphone 12 is also adjustable. In this way, during the measurement process, the user can adjust the distance between the left earphone 11 and the right earphone 12 according to the actual measurement scenario, thereby adjusting the distance between the electrodes on the left earphone 11 and the electrodes on the right earphone 12, and measuring more accurate results.

[0128] In some application scenarios, the electronic device 100 may be a watch 20. The watch 20 may include a movement and a strap. The multiple electrodes of the watch 20 may be disposed on the strap, on the movement, or separately on the movement and the strap. Figures 3A to 3E show schematic diagrams of three different device configurations of watches 20 provided in embodiments of the present application.

[0129] For example, as shown in FIG3A , a watch 20 may include a movement 21 and a watch strap 22 . The movement 21 may include a display screen that can be used to display monitoring results and information such as time. The watch 20 may include multiple electrodes, such as electrodes 1 and 2 , and optionally, electrodes 3 and 4 . The multiple electrodes may be provided on the watch strap 22 .

[0130] The watchband 22 may include a front and a back. When the watch 20 is placed on a table (or other horizontal surface) with the display screen facing upward, the side of the watchband 22 facing upward is the front of the watchband 22, and the side of the watchband 22 in contact with the table (or other horizontal surface) is the back of the watchband 22. The watchband 22 may be provided with multiple electrodes, and these multiple electrodes may be provided on the same side of the watchband 22. For example, these multiple electrodes may all be provided on the front of the watchband 22, or all on the back of the watchband 22. Furthermore, the watchband 22 may include two ends, namely, end A and end B as shown in FIG3A . Electrode 1 and electrode 2 may be provided at different ends of the watchband 22. For example, in the embodiment shown in FIG3A , electrodes 1 and 3 may be provided at end A of the watchband 22, and electrodes 2 and 4 may be provided at end B of the watchband 22, with all of these multiple electrodes provided on the front of the watchband 22. Furthermore, the multiple electrodes provided on the watchband 22 do not contact each other.

[0131] It should be noted that in the above case, the distance between electrode 1 and electrode 2 needs to be greater than the minimum length, which can be a preset average length of the human heart. In this way, when measuring, electrode 1 and electrode 2 can span across the heart and determine the cardiac impedance. In other embodiments, the distance between electrode 1 and electrode 2 also needs to be less than or equal to the maximum length, which can be the length of strap 22 or a preset length value. While ensuring that electrode 1 and electrode 2 can span across the heart, the closer the distance between electrode 1 and electrode 2 and the heart, the more accurate the measurement result. In this way, the accuracy of the measurement result can be improved.

[0132] It is understood that the watch 20 shown in FIG3A is merely an example. In some embodiments, the movement 21 may be provided with one or more buttons (e.g., a crown, etc.), and this application does not limit this. Furthermore, this application does not limit the shape of the movement 21 and display screen, or the shape and length of the strap 22.

[0133] In other embodiments, the multiple electrodes in the watch 20 may also be disposed on the movement 21, for example, on the back of the movement 21 and on the buttons of the movement 21. The movement 21 may include a front and a back. When the user wears the watch 20, the side that contacts the user's skin is the back of the movement 21, and the side opposite the back is the front of the movement 21. For example, the electrode distribution on the buttons of the movement 21 can refer to the embodiment shown in Figure 3B below, and the electrode distribution on the back of the movement 21 can refer to the embodiment shown in Figure 3C below.

[0134] As shown in FIG3B , in a watch 20, movement 21 may be provided with one or more buttons (including a crown, etc.), one or more of which may be provided with electrodes. For example, one of the buttons may be provided with electrode 2, and optionally, another button may be provided with electrode 4, with electrodes 2 and 4 not in contact with each other. Meanwhile, the back of movement 21 may be provided with electrode 1, and optionally, electrode 3, with electrodes 1 and 3 not in contact with each other.

[0135] As shown in FIG3C , in a watch 20, the back of the movement 21 may be provided with electrode 1, and optionally, electrode 3. When electrodes 1 and 3 are provided on the back of the movement 21, electrodes 1 and 3 do not contact each other. At the same time, the movement 21 may be provided with one or more buttons (including a crown, etc.), one or more of which may be provided with electrodes. For example, one of the buttons may be provided with electrode 2, and optionally, another button may be provided with electrode 4, with electrodes 2 and 4 not contacting each other.

[0136] In other embodiments, the multiple electrodes in the watch 20 may also be respectively provided on the movement 21 and the strap 22. For example, the electrode distribution on the movement 21 may refer to the embodiment shown in FIG3D below, and the electrode distribution on the strap 22 may refer to the embodiment shown in FIG3E below.

[0137] As shown in FIG3D , in the watch 20, one or more buttons (including a crown, etc.) may be provided on the movement 21, and one or more of the one or more buttons may be provided with electrodes. For example, one of the buttons may be provided with an electrode 2, and optionally, another button may be provided with an electrode 4, and electrodes 2 and 4 do not contact each other. At the same time, an electrode 1 may be provided on the strap 22, and optionally, an electrode 3 may be provided on the strap 22, and electrodes 1 and 3 do not contact each other. It should be noted that the electrodes on the strap 22 are provided on the back of the strap 22, and the back of the strap 22 refers to the side of the strap 22 that contacts the user's wrist when the user wears the watch 20. Moreover, when the user wears the watch 20, electrodes 1 and 3 can contact the user's wrist.

[0138] As shown in FIG3E , in the watch 20, the back of the watchband 22 may be provided with electrode 1, and optionally, electrode 3. The positional relationship of electrode 1 and electrode 3 relative to the movement 21 may be the same, for example, both located on the left (or right) side of the movement 21. The positional relationship of electrode 1 and electrode 3 relative to the movement 21 may also be different, for example, electrode 1 located on the left side of the movement 21 and electrode 3 located on the right side of the movement 21. When electrodes 1 and 3 are provided on the back of the watchband 22, electrodes 1 and 3 do not contact each other. At the same time, one or more buttons (including a crown, etc.) may be provided on the movement 21, and one or more of the one or more buttons may be provided with electrodes. For example, one of the buttons may be provided with electrode 2, and optionally, another button may be provided with electrode 4, and electrodes 2 and 4 do not contact each other.

[0139] In other embodiments, electrodes 1 and 3 may also be provided on the front of the strap 22, where the front of the strap 22 is the side opposite to the back of the strap 22. In this case, electrodes 2 and 4 may be provided on the back of the movement 21, or on the side of the button that contacts the user's wrist, which is not limited in this application.

[0140] It can be understood that Figures 3A to 3E are just three examples. In the embodiment of the present application, the electrodes can also be set at other positions of the watch 20. In addition, the watch 20 in the above embodiment can also be replaced by a wearable device such as a bracelet, and the present application does not limit this.

[0141] FIG4A shows a schematic diagram of the device form of a mobile phone 30 provided in an embodiment of the present application.

[0142] As shown in Figure 4B, the mobile phone 30 may include one or more buttons and multiple electrodes. One or more of the multiple electrodes may be set on the one or more buttons. Exemplarily, the one or more buttons may include a volume button 31, a volume button 32, a fingerprint button 33, etc. The multiple electrodes may include electrode 1 and electrode 2. Optionally, the multiple electrodes may also include electrode 3 and electrode 4. The multiple electrodes may be respectively set on different buttons, or respectively set in different areas of the same button. For example, electrode 1 may be set on the volume button 31, and electrode 3 may be set on the volume button 32. Electrode 2 may be set in the upper half area of ​​the fingerprint button 33, and electrode 4 may be set in the lower half area of ​​the fingerprint button 33. It should be noted that electrode 1 and electrode 3 do not contact each other, and electrode 2 and electrode 4 do not contact each other.

[0143] FIG4B shows a schematic diagram of the device form of another mobile phone 30 provided in an embodiment of the present application.

[0144] As shown in Figure 4B, the mobile phone 30 may include multiple electrodes, a front camera, a microphone, etc. The multiple electrodes may include electrode 1 and electrode 2, and optionally, may also include electrode 3 and electrode 4. The mobile phone 30 may have four sides, an upper side, a lower side, a left side, and a right side. Among them, the upper side is the side closest to the front camera and / or microphone, the lower side is the side parallel to the upper side, the left side and the right side are two sides parallel to each other, and the left side and the right side are both perpendicular to the upper side. The multiple electrodes of the mobile phone 30 can be respectively arranged on the left and right sides of the mobile phone 30, for example, electrode 1 and electrode 3 are arranged on the left side of the mobile phone 30, and electrode 2 and electrode 4 are arranged on the right side of the mobile phone 30. It should be noted that electrode 1 and electrode 3 do not contact each other, and electrode 2 and electrode 4 do not contact each other.

[0145] It is understood that Figures 4A and 4B are just two examples. In some embodiments, the mobile phone 30 may also be a mobile phone with a foldable screen, or include more, fewer, or different buttons than the embodiment shown in Figure 4A above, or may be a mobile phone with a different form than the embodiment shown above, and the electrodes in the mobile phone 30 may also be set in different positions than the embodiment described above (for example, respectively set on the top and bottom of the mobile phone 30, or set on the back of the mobile phone 30, etc.), and this application does not limit this. In other embodiments, the mobile phone 30 may also be replaced by an electronic device such as a tablet computer, and this application does not limit this.

[0146] FIG5A shows a schematic diagram of the hardware structure of an electronic device 100 provided in an embodiment of the present application.

[0147] The electronic device 100 may be the headset 10 in the embodiment shown in Figures 2A to 2C above, or the watch 20 (or other wearable device such as a wristband) in the embodiment shown in Figures 3A to 3C, or the mobile phone shown in Figures 4A to 4B. In some embodiments, the electronic device 100 may also be a tablet computer, a handheld computer, a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, an in-vehicle device, a smart home device, and / or a smart city device. The embodiments of the present application do not impose any particular restrictions on the specific type of the electronic device.

[0148] As shown in FIG5A , electronic device 100 may include a processor 110, internal memory 121, a charging management module 140, a power management module 141, a battery 142, a wireless communication module 160, an audio module 170, and a sensor module 180. In some embodiments, electronic device 100 may further include any one or more of the following: a button 190, a motor 191, an indicator 192, a display screen 194, etc. Sensor module 180 may include an electrode sensor 180E and a touch sensor 180K. In some embodiments, sensor module 180 may further include any one or more of the following: a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, an ambient light sensor, a bone conduction sensor, an airbag sensor, etc.

[0149] It should be understood that the structure illustrated in the embodiments of the present invention does not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown, or may combine or separate certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0150] The processor 110 may include one or more processing units. For example, the processor 110 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU). The different processing units may be independent devices or integrated into one or more processors.

[0151] The controller can generate operation control signals according to the instruction operation code and timing signal to complete the control of instruction fetching and execution.

[0152] Processor 110 may also include a memory for storing instructions and data. In some embodiments, the memory in processor 110 is a cache memory. This memory can store instructions or data that have just been used or are being recycled by processor 110. If processor 110 needs to use the same instruction or data again, it can directly access the memory. This avoids duplicate accesses, reduces processor 110 latency, and thus improves system efficiency.

[0153] In some embodiments, the processor 110 may include one or more interfaces. The interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface.

[0154] The charging management module 140 is configured to receive charging input from a charger. The charger can be either a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 can receive charging input from the wired charger. In some wireless charging embodiments, the charging management module 140 can receive wireless charging input via the wireless charging coil of the electronic device 100. While charging the battery 142, the charging management module 140 can also provide power to the electronic device through the power management module 141.

[0155] The power management module 141 is used to connect the battery 142, the charging management module 140, and the processor 110. The power management module 141 receives input from the battery 142 and / or the charging management module 140 and provides power to the processor 110, the internal memory 121, the display 194, and the wireless communication module 160. The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle count, and battery health status (leakage, impedance). In some other embodiments, the power management module 141 can also be set in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 can also be set in the same device.

[0156] The wireless communication module 160 can provide wireless communication solutions for the electronic device 100, including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (IR), and NearLink. The wireless communication module 160 can be one or more devices that integrate at least one communication processing module.

[0157] Electronic device 100 implements display functionality through a GPU, display screen 194, and an application processor. A GPU is a microprocessor for image processing that connects display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or modify display information.

[0158] Display screen 194 is used to display images, videos, etc. Display screen 194 includes a display panel. The display panel can be a liquid crystal display (LCD). The display panel can also be made of an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a MiniLED, a MicroLED, a Micro-oLed, a quantum dot light-emitting diode (QLED), etc. In some embodiments, electronic device 100 can include one or N display screens 194, where N is a positive integer greater than 1.

[0159] The internal memory 121 may include one or more random access memories (RAMs) and one or more non-volatile memories (NVMs). The RAM can be directly read and written by the processor 110 and can be used to store executable programs (e.g., machine instructions) of the operating system or other running programs, as well as user and application data. The NVM can also store executable programs and user and application data, and can be pre-loaded into the RAM for direct reading and writing by the processor 110.

[0160] The electronic device 100 can implement audio functions such as music playback and recording through the audio module 170 and the application processor. The audio module 170 may include any one or more of the following: a speaker 170A, a receiver 170B, and a microphone 170C.

[0161] The audio module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. The audio module 170 can also be used to encode and decode audio signals. In some embodiments, the audio module 170 can be provided in the processor 110, or some functional modules of the audio module 170 can be provided in the processor 110.

[0162] The speaker 170A, also called a "speaker", is used to convert audio electrical signals into sound signals. The electronic device 100 can listen to music or listen to hands-free calls through the speaker 170A.

[0163] The receiver 170B, also called a "handset", is used to convert audio electrical signals into sound signals. When the electronic device 100 receives a call or a voice message, the user can place the receiver 170B close to the ear to hear the voice.

[0164] Microphone 170C, also known as "microphone" or "microphone", is used to convert sound signals into electrical signals. When making a call or sending a voice message, the user can speak by putting their mouth close to the microphone 170C to input the sound signal into the microphone 170C. The electronic device 100 can be provided with at least one microphone 170C. In other embodiments, the electronic device 100 can be provided with two microphones 170C, which can not only collect sound signals but also realize noise reduction function. In other embodiments, the electronic device 100 can also be provided with three, four or more microphones 170C to collect sound signals, reduce noise, identify the source of sound, realize directional recording function, etc.

[0165] In some embodiments, the audio module 170 may further include an earphone jack for connecting a wired earphone. The earphone jack may be a USB interface, a 3.5mm open mobile terminal platform (OMTP) standard interface, or a cellular telecommunications industry association of the USA (CTIA) standard interface.

[0166] Electrode sensor 180E may refer to multiple electrodes in a monitoring circuit, such as electrodes 1, 2, 3, and 4 in the embodiment shown in FIG2A . The specific contents of the monitoring circuit can be referred to in the description of the embodiments shown in FIG5D to FIG5H below and will not be described in detail here.

[0167] The touch sensor 180K is also called a "touch-sensitive device." The touch sensor 180K can be disposed on the display screen 194. The touch sensor 180K and the display screen 194 form a touch screen, also called a "touch screen." The touch sensor 180K is used to detect touch operations applied thereto or in the vicinity thereof. The touch sensor can transmit the detected touch operations to the application processor to determine the type of touch event. Visual output related to the touch operations can be provided via the display screen 194. In other embodiments, the touch sensor 180K can also be disposed on the surface of the electronic device 100, at a location different from that of the display screen 194.

[0168] Optionally, the sensor module 180 may also include but is not limited to any one or more of the following: pressure sensor, gyroscope sensor, air pressure sensor, magnetic sensor, acceleration sensor, distance sensor, proximity light sensor, ambient light sensor, fingerprint sensor, temperature sensor, bone conduction sensor, air pressure sensor, etc.

[0169] The pressure sensor is used to sense pressure signals and convert them into electrical signals. In some embodiments, the pressure sensor can be provided on the display screen 194. When a touch operation is applied to the display screen 194, the electronic device 100 detects the intensity of the touch operation using the pressure sensor. The electronic device 100 can also calculate the location of the touch based on the detection signal from the pressure sensor. In some embodiments, touch operations applied to the same touch location but with different touch operation intensities can correspond to different operation instructions.

[0170] The gyroscope sensor can be used to determine the motion posture of the electronic device 100. In some embodiments, the angular velocity of the electronic device 100 around three axes (ie, x, y, and z axes) can be determined by the gyroscope sensor.

[0171] The air pressure sensor is used to measure air pressure. In some embodiments, the electronic device 100 calculates the altitude using the air pressure value measured by the air pressure sensor to assist in positioning and navigation.

[0172] The magnetic sensor includes a Hall sensor. In some embodiments, the electronic device 100 can use the magnetic sensor to implement functions such as a compass.

[0173] The accelerometer can detect the magnitude of acceleration of the electronic device 100 in all directions (generally three axes). When the electronic device 100 is stationary, it can detect the magnitude and direction of gravity. It can also be used to identify the electronic device's posture, enabling applications such as switching between landscape and portrait modes and pedometers.

[0174] The distance sensor is used to measure the distance. The electronic device 100 can measure the distance by infrared or laser.

[0175] The proximity light sensor may include, for example, a light emitting diode (LED) and a light detector, such as a photodiode. The LED may be an infrared light emitting diode. The electronic device 100 emits infrared light through the LED. The electronic device 100 uses the photodiode to detect infrared reflected light from a nearby object. When sufficient reflected light is detected, it can be determined that there is an object near the electronic device 100. When insufficient reflected light is detected, the electronic device 100 can determine that there is no object near the electronic device 100.

[0176] The ambient light sensor is used to sense the ambient light brightness.

[0177] The fingerprint sensor is used to collect fingerprints. The electronic device 100 can use the collected fingerprint characteristics to achieve fingerprint unlocking, access application locks, fingerprint photography, fingerprint call answering, etc.

[0178] The temperature sensor is used to detect temperature. In some embodiments, the electronic device 100 uses the temperature detected by the temperature sensor to implement a temperature processing strategy. In some embodiments, the temperature sensor can be used to detect the temperature of the electronic device 100. In some embodiments, the temperature sensor can also be used to detect the body temperature of a user. In other embodiments, the temperature sensor can also be used to detect the temperature of the environment in which the electronic device 100 is located.

[0179] The bone conduction sensor can acquire vibration signals. In some embodiments, the bone conduction sensor can also contact the human pulse to receive blood pressure signals. In some embodiments, the application processor can parse heart rate information based on the blood pressure signals acquired by the bone conduction sensor 180M to implement heart rate detection.

[0180] The airbag sensor can be used to detect the user's blood pressure.

[0181] The buttons 190 include a power button, a volume button, and the like. The buttons 190 may be mechanical buttons or touch buttons. The electronic device 100 may receive key inputs and generate key signal inputs related to user settings and function control of the electronic device 100.

[0182] Motor 191 can generate vibration prompts. Motor 191 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback. For example, touch operations acting on different applications (such as taking pictures, audio playback, etc.) can correspond to different vibration feedback effects. For touch operations acting on different areas of the display screen 194, motor 191 can also correspond to different vibration feedback effects. Different application scenarios (for example: time reminders, receiving messages, alarm clocks, games, etc.) can also correspond to different vibration feedback effects. The touch vibration feedback effect can also support customization.

[0183] The indicator 192 may be an indicator light, which may be used to indicate the charging status, power level changes, messages, missed calls, notifications, etc.

[0184] It should be noted that, in the embodiment of the present application, the hardware structure of the electronic device 200 may refer to the hardware structure of the electronic device 100 shown in FIG. 5A , and this application will not elaborate on it here.

[0185] An embodiment of the present application provides a monitoring method, and the electronic device 100 may include a monitoring circuit, and the monitoring circuit may include an electrode 1 and an electrode 2, and the electrode 1 and the electrode 2 are respectively arranged at different positions on the surface of the electronic device 100. The electronic device 100 can receive and respond to the user's operation of turning on cardiac function monitoring, or receive and respond to the start instruction sent by the electronic device 200, and determine and output the user's cardiac function index through the electrode 1 and the electrode 2. The cardiac function index may include cardiac output and stroke volume. When the electronic device 100 performs cardiac function monitoring, the electrode 1 contacts the contact point 1 on the skin, and the electrode 2 contacts the contact point 2 on the skin, and the contact point 1 and the contact point 2 are respectively located at the two ends of the chest tissue (for example, the upper end and the lower end, or the left end and the right end). Among them, the electronic device 100 can be a portable device such as headphones, watches, bracelets or mobile phones.

[0186] In this way, the user can monitor cardiac function through the electronic device 100. Moreover, since the electronic device 100 is a device frequently used in daily life and is easy to carry, the user can obtain cardiac function monitoring results in real time.

[0187] The following describes a monitoring circuit in an electronic device 100 provided in an embodiment of the present application.

[0188] FIG5B shows a schematic structural diagram of a monitoring circuit provided in an embodiment of the present application.

[0189] As shown in FIG5B , the monitoring circuit may include an excitation current generating unit, a voltage measuring unit, an electrode 1 , an electrode 2 , and an analog switch S0 .

[0190] The two ends of the analog switch S0 can be connected to the excitation current generating unit and the electrode 1 respectively.

[0191] The excitation current generating unit may include a positive electrode and a negative electrode, each of which may be connected to an analog switch S0 and an electrode 2, respectively. The excitation current generating unit may generate a constant current. The current signal generated by the excitation current generating unit may be described in detail in the embodiment shown in FIG. 5D below and will not be described in detail here.

[0192] The voltage measurement unit can be connected in parallel with the excitation current generating unit. For example, the voltage measurement unit can include a positive electrode and a negative electrode. One end of the voltage measurement unit can be connected to electrode 2 and the negative electrode of the excitation current generating unit, and the other end can be connected to the positive electrode of the excitation current generating unit. The voltage measurement unit can measure the voltage across electrodes 1 and 2.

[0193] When both electrodes 1 and 2 are in good contact with the user's skin, and their contact points are located at opposite ends of the chest tissue, due to the body's resistance, electrode 1 can be considered connected to electrode 2 through the body's resistance. In this case, if analog switch S0 is closed, a circuit is formed between electrodes 1 and 2. By measuring the current flowing through the body's resistance and the voltage across the body's resistance in this circuit, the user's cardiac impedance can be determined. The user's cardiac impedance is the ratio of the voltage across the body's resistance to the current flowing through the body's resistance.

[0194] It's important to note that cardiac function measurement requires determining the user's cardiac impedance, and therefore the current flowing through the user's heart and the voltage across the heart. Compared to ECG measurement, cardiac function measurement requires an excitation current generator to generate current flowing through the user's heart. Therefore, the monitoring circuit used to measure the user's cardiac impedance requires an excitation current generator, while the circuit used to measure ECG does not.

[0195] It is understandable that Figure 5B only exemplifies a monitoring circuit that can measure the user's cardiac impedance. In an embodiment of the present application, the monitoring circuit may also include more circuit components (such as electrodes, etc.) than the embodiment shown in Figure 5B, or include circuit components different from the above embodiment. This application does not limit this.

[0196] FIG5C shows a schematic diagram of a current signal generated by an excitation current generating unit provided in an embodiment of the present application.

[0197] As shown in FIG5C , in a two-dimensional coordinate system, the horizontal axis may represent time, and the vertical axis may represent current value. The current signal generated by the excitation current generating unit may be the current signal I shown in FIG5C . The current signal I may be a sinusoidal signal with a constant frequency, and the frequency of the current signal I may be f1 kilohertz (kHz). In some embodiments, f1 may be greater than or equal to 1.

[0198] It is understandable that the current signal shown in FIG5C is only an example. In other embodiments, the current signal may also be a cosine signal, or a square wave signal, etc., which is not limited in this application.

[0199] In some embodiments, the monitoring circuit in the electronic device 100 can not only measure the user's cardiac impedance, but also determine whether the electrodes are in good contact with the user's skin.

[0200] For example, FIG5D shows a schematic structural diagram of another monitoring circuit provided in an embodiment of the present application.

[0201] As shown in FIG5D , the monitoring circuit may include an excitation current generating unit, a voltage measuring unit, one or more analog switches, and a plurality of electrodes. The one or more analog switches may include an analog switch S1 and an analog switch S2, and the plurality of electrodes may include electrode 1, electrode 2, electrode 3, and electrode 4.

[0202] In the monitoring circuit, the excitation current generating unit may include a positive electrode and a negative electrode, and the positive electrode and the negative electrode may be connected to the analog switch S2 and the analog switch S1, respectively. For example, the positive electrode may be connected to the analog switch S2, and the negative electrode may be connected to the analog switch S1. The excitation current generating unit may generate current. It should be noted that the waveform diagram of the current signal generated by the excitation current generating unit may refer to the relevant description in the embodiment shown in Figure 5C above. In some embodiments, the frequency of the current signal generated by the excitation current generating unit may be different in different scenarios. For example, when the monitoring circuit measures the user's cardiac impedance, the frequency of the current signal generated by the excitation current generating unit may be greater than or equal to 1kHz; when the monitoring circuit determines whether the electrode is in good contact with the user's skin, the frequency of the current signal may be less than 1kHz. In other embodiments, the excitation current generating unit may also generate the same current signal in different scenarios, for example, generating a current signal with a frequency greater than or equal to 1kHz, etc., which is not limited in this application.

[0203] One end of the voltage measuring unit can be connected to electrode 4, and the other end can be connected to electrode 3. The voltage measuring unit can measure the voltage across electrodes 3 and 4. In other embodiments, the two ends of the voltage measuring unit can also be connected to electrode 1 and electrode 2 respectively. In this case, the voltage measuring unit can measure the voltage across electrodes 1 and 2.

[0204] The analog switch S1 may include two ports, port A1 and port A2. Port A1 may be connected to electrode 1, and port A2 may be connected to electrode 4. The analog switch S1 may select to connect port A1 or port A2, or may select to connect neither port.

[0205] The analog switch S2 may include two ports, port B1 and port B2. Port B1 may be connected to electrode 2, and port B2 may be connected to electrode 3. The analog switch S2 may select to connect port B1 or port B2, or may select to connect neither port.

[0206] When none of the electrodes in the monitoring circuit are in contact with the user's skin (or the contact is poor), any two electrodes in the monitoring circuit are not connected to each other because they are not in contact with each other. When multiple electrodes in the monitoring circuit are in good contact with the user's skin, due to the resistance of the human body (such as skin resistance, body resistance, etc.), an electrode in the monitoring circuit can be connected to another electrode through the skin, body, etc.

[0207] In the embodiment of the present application, the contact point between electrode 1 and the user's skin can be referred to as contact point 1, the contact point between electrode 2 and the user's skin can be referred to as contact point 2, the contact point between electrode 3 and the user's skin can be referred to as contact point 3, and the contact point between electrode 4 and the user's skin can be referred to as contact point 4. When all electrodes in the monitoring circuit are in contact with the user's skin, since the distance between electrode 1 and electrode 3 is relatively close, and the distance between electrode 2 and electrode 4 is relatively close, electrode 1 and electrode 3 can be regarded as being connected through skin resistance 1, which is the resistance of the skin located between electrode 1 and electrode 3. Electrode 2 and electrode 4 can be regarded as being connected through skin resistance 2, which is the resistance of the skin located between electrode 2 and electrode 4. Similarly, electrode 1 and electrode 2, and electrode 3 and electrode 4 can also be regarded as being connected through skin resistance. If contact points 1 and 2 are located at opposite ends of the chest tissue, the resistance between contact points 1 and 2 can be equivalent to the user's body resistance (also known as cardiac resistance). In this case, electrodes 1 and 2 can be considered connected through this body resistance, and electrodes 3 and 4 can also be considered connected through this body resistance. In this case, the monitoring circuit can determine the user's cardiac impedance and, thereby, the user's cardiac output and stroke volume.

[0208] FIG5E shows a circuit connection diagram of a monitoring circuit provided in an embodiment of the present application.

[0209] As shown in FIG5E , the monitoring circuit may include the following circuit components: electrode 1 , electrode 2 , electrode 3 , electrode 4 , analog switch S1 , analog switch S2 , an excitation current generating unit AC, and a voltage measuring unit V, etc.

[0210] The positive electrode of the voltage measuring unit V can be connected to the electrode 4, and the negative electrode can be connected to the electrode 3. The voltage measuring unit V can be used to measure the voltage across the electrodes 3 and 4. In other embodiments, the positive electrode of the voltage measuring unit can also be connected to the electrode 3, and the negative electrode can be connected to the electrode 4.

[0211] The positive pole of the excitation current generating unit AC can be connected to the analog switch S2, and the negative pole of the excitation current generating unit AC can be connected to the analog switch S1. The analog switch S1 can include two ports, port A1 and port A2. Among them, port A1 can be connected to electrode 1, and port A2 can be connected to electrode 4. The analog switch S1 can receive and respond to instructions sent by the electronic device 100 (or other electronic devices) to select whether to connect port A1 or port A2, or not to connect either port. Similarly, the analog switch S2 can also include two ports, port B1 and port B2, wherein port B1 can be connected to electrode 2, and port B2 can be connected to electrode 3. The analog switch S1 can receive and respond to instructions sent by the electronic device 100 (or other electronic devices) to select whether to connect port B1 or port B2, or not to connect either port.

[0212] The excitation current generating unit AC can be used to generate a current of constant magnitude, and this current is less than or equal to the human body safety current and is harmless to the human body. When the excitation current generating unit AC is in the loop, the excitation current generating unit AC can output current through the positive electrode and adjust the magnitude of the output current based on the current flowing into the negative electrode, thereby maintaining the stability of the current magnitude in the loop. Therefore, the excitation current generating unit AC can also determine whether the excitation current generating unit AC is in the loop based on whether current flows into the negative electrode, thereby determining whether the electrode is in good contact with the skin.

[0213] When all electrodes in the monitoring circuit are in contact with the user's skin, that is, electrode 1 is in contact with contact point 1, electrode 2 is in contact with contact point 2, electrode 3 is in contact with contact point 3, and electrode 4 is in contact with contact point 4, the monitoring circuit may also include the contact resistance generated by each electrode. These contact resistances may include the contact resistance R1 corresponding to electrode 1, the contact resistance R2 corresponding to electrode 2, the contact resistance R3 corresponding to electrode 3, and the contact resistance 4 corresponding to electrode 4. Moreover, electrodes 1 and 3, electrodes 2 and 4, electrodes 1 and 2, and electrodes 3 and 4 may be connected through the skin. The skin resistance between electrode 1 and electrode 3 may be referred to as R 皮肤1 ; The skin resistance between electrode 2 and electrode 4 can be called R 皮肤2 If contact point 1 and contact point 2 are located at the two ends of the chest tissue, then electrode 1 and electrode 2 can also be connected through the user's body, and the resistance between electrode 1 and electrode 2 can be regarded as the user's body resistance R躯体 At this time, the resistance between electrode 3 and electrode 4 can also be regarded as the user's body resistance R 躯体 .

[0214] In addition, when contact point 1 and contact point 2 are located at the two ends of the chest tissue respectively, and electrode 3 and electrode 4 are both in contact with the skin, electrode 3 can be connected to electrode 4 through the user's body, that is, the resistance between electrode 3 and electrode 4 can also be regarded as the body resistance R 躯体 Therefore, as shown in FIG5E , the electrode 3 can be connected to the body resistance R 躯体 And dotted line 2 is connected to electrode 4. It should be noted that the dotted lines (dashed line 1 and dotted line 2) here do not refer to physical circuit connection lines, but are used to help illustrate that electrode 3 can be connected to electrode 4 through the user's body. That is, the user's body can be equivalent to the dotted line 1 and body resistance R shown in Figure 5E. 躯体 Similarly, when the electrode 1 is connected to the electrode 2 through the user's body, the user's body can also be equivalent to the dotted line 3 shown in FIG5E, and the body resistance R 躯体 Similarly, when the electrode 1 is connected to the electrode 3 through the user's local skin, the skin between the electrode 1 and the electrode 3 can also be equivalent to the dotted line 5, R shown in FIG5E. 皮肤1 In the case where the electrode 2 is connected to the electrode 4 through the user's local skin, the skin between the electrode 2 and the electrode 4 can also be equivalent to the dotted line 7, R shown in FIG. 5E 皮肤2 And dotted line 8. It can be understood that when a loop can be formed between the two electrodes through the user's body or skin, the dotted line at both ends of the skin resistance or other resistance can be regarded as conductive, otherwise, the dotted line can be regarded as disconnected (i.e., non-conductive).

[0215] When all electrodes in the monitoring circuit are in contact with the user's skin, the analog switch S1 and the analog switch S2 can selectively connect to different ports, thereby forming a loop in different electrodes.

[0216] 5F to 5H show schematic diagrams of circuit connections when all electrodes in the monitoring circuit are in contact with the user's skin and the analog switch is connected to different ports.

[0217] For example, when all electrodes in the monitoring circuit are in contact with the user's skin, when the analog switch S1 is connected to port A1 and the analog switch S2 is connected to port B2, a loop can be formed between electrode 1 and electrode 3. Therefore, the dotted line 5 and the dotted line 6 shown in Figure 5E can be regarded as conductive. At this time, the monitoring circuit can form a loop 1 between electrode 1 and electrode 3 as shown in Figure 5F.

[0218] As shown in FIG5F , the circuit 1 may include an excitation current generating unit AC, an electrode 1 and an electrode 3. Since the electrodes 1 and 3 are in good contact with the user's skin, the electrodes 1 and 3 can be connected through the skin resistance R 皮肤1 The circuit 1 may also include the contact resistance R1 of the electrode 1 and the contact resistance R3 of the electrode 3. That is, the excitation current generating unit AC, the contact resistance R1, the contact resistance R3 and the skin resistance R 皮肤1 They can be connected in series to form a loop 1. In the loop 1, the excitation current generating unit AC can generate current, and the excitation current generating unit AC can also determine the magnitude of the current in the loop 1 and adjust the magnitude of the current generated by the excitation current generating unit AC in real time.

[0219] When the analog switch S1 is connected to port A1 and the analog switch S2 is connected to port B2, if the excitation current generating unit AC determines that there is current between electrode 1 and electrode 3 (or determines that the current between electrode 1 and electrode 3 is greater than or equal to the preset current threshold), it indicates that loop 1 can be formed in the monitoring circuit, that is, both electrode 1 and electrode 3 are in good contact with the user's skin; if the excitation current generating unit AC determines that there is no current between electrode 1 and electrode 3 (or determines that the current between electrode 1 and electrode 3 is less than the preset current threshold), it indicates that loop 1 cannot be formed in the monitoring circuit, that is, at least one of electrode 1 and electrode 3 is in poor contact with the user's skin.

[0220] Therefore, the monitoring circuit can determine whether there is poor contact between electrode 1 and electrode 3 and the skin by controlling the analog switch S1 to connect to port A1 and the analog switch S2 to connect to port B2.

[0221] As another example, when all electrodes in the monitoring circuit are in contact with the user's skin, when the analog switch S1 is connected to port A2 and the analog switch S2 is connected to port B1, a loop can be formed between electrode 2 and electrode 4. Therefore, the dotted line 7 and the dotted line 8 shown in Figure 5E can be regarded as conductive. At this time, the monitoring circuit can form a loop 2 between electrode 2 and electrode 4 as shown in Figure 5F.

[0222] As shown in FIG5G , the circuit 2 may include an excitation current generating unit AC, an electrode 2 and an electrode 4. Since the electrodes 2 and 4 are in good contact with the user's skin, the electrodes 2 and 4 can be connected through the skin resistance R 皮肤2 The circuit 2 may also include the contact resistance R2 of the electrode 2 and the contact resistance R4 of the electrode 4. That is, the excitation current generating unit AC, the contact resistance R2, the contact resistance R4 and the skin resistance R 皮肤2 They can be connected in series to form loop 2. In loop 2, the excitation current generating unit AC can generate current, and the excitation current generating unit AC can also determine the magnitude of the current in loop 2 and adjust the magnitude of the current generated by the excitation current generating unit AC in real time.

[0223] When the analog switch S1 is connected to port A2 and the analog switch S2 is connected to port B1, if the excitation current generating unit AC determines that there is current between electrode 2 and electrode 4 (or determines that the current between electrode 2 and electrode 4 is greater than or equal to the preset current threshold), it indicates that loop 2 can be formed in the monitoring circuit, that is, both electrode 2 and electrode 4 are in good contact with the user's skin; if the excitation current generating unit AC determines that there is no current between electrode 2 and electrode 4 (or determines that the current between electrode 2 and electrode 4 is less than the preset current threshold), it indicates that loop 2 cannot be formed in the monitoring circuit, that is, at least one of electrode 2 and electrode 4 is in poor contact with the user's skin.

[0224] Therefore, the monitoring circuit can determine whether there is poor contact between the electrode 2 and the electrode 4 and the skin by controlling the analog switch S1 to connect to the port A2 and the analog switch S2 to connect to the port B1.

[0225] As another example, when all electrodes in the monitoring circuit are in contact with the user's skin, and contact point 1 and contact point 2 are located at opposite ends of the chest tissue, when analog switch S1 connects to port A1 and analog switch S2 connects to port B1 (or when analog switch S1 connects to port A2 and analog switch S2 connects to port B1), a loop can be formed between electrode 1 and electrode 2, and between electrode 3 and electrode 4. Therefore, the dotted line 1, dotted line 2, dotted line 3, and dotted line shown in FIG5E can all be considered conductive. In this case, as shown in FIG5H , the monitoring circuit can form loop 3 between electrode 1 and electrode 2, and loop 4 between electrode 2 and electrode 4.

[0226] As shown in FIG5H , the loop 3 between electrode 1 and electrode 2 may include an excitation current generating unit AC, electrode 1 and electrode 2 , and the loop 4 between electrode 3 and electrode 4 may include electrode 3 , electrode 4 and a voltage measuring unit V.

[0227] In loop 3, since electrodes 1 and 2 are in good contact with the user's skin, and the line between contact point 1 and contact point 2 can cross the two ends of the user's heart, electrodes 1 and 2 can be connected through the body resistance R 躯体 The circuit 3 may also include the contact resistance R1 of the electrode 1 and the contact resistance R2 of the electrode 2. That is, the excitation current generating unit AC, the contact resistance R1, the contact resistance R2 and the body resistance R 躯体 The circuit 3 can be connected in series. In the circuit 3, the excitation current generating unit AC can generate current, and the excitation current generating unit AC can also determine the magnitude of the current in the circuit 3 and adjust the magnitude of the current generated by the excitation current generating unit AC in real time so that the current flowing through the body resistance R 躯体 The magnitude of the current remains stable.

[0228] In loop 4, since electrodes 3 and 4 are in good contact with the user's skin, and the distance between electrode 1 and electrode 3 is small, and the distance between electrode 2 and electrode 4 is small, electrodes 3 and 4 can also be connected through the body resistance R 躯体 The circuit 4 may also include the contact resistance R3 of the electrode 3 and the contact resistance R4 of the electrode 4. That is, the contact resistance R3, the voltage measuring unit V, the contact resistance R4 and the body resistance R 躯体 Can be connected in series to form loop 4. Due to the body resistance R 躯体 It is also a component of loop 3. The current generated by the excitation current generating unit AC will flow through the body resistance R 躯体 , and the body resistance R 躯体 In loop 4, the voltage measuring unit V can measure the voltage between electrode 3 and electrode 4, that is, the body resistance R 躯体 The voltage across both ends.

[0229] Therefore, when the analog switch S1 is connected to the port A1 and the analog switch S2 is connected to the port B1, the monitoring circuit 3 can determine the current flowing through the body resistance R by the excitation current generating unit AC. 躯体 The body resistance R can also be determined by the voltage measurement unit V 躯体 The voltage across the two ends is used to determine the user's cardiac impedance. For example, the cardiac impedance can be the body resistance R 躯体 The voltage across the body and the resistance R 躯体 The ratio of the current.

[0230] It is understandable that Figures 5D to 5H are only examples. In the embodiments of the present application, the monitoring circuit may also include more, fewer, or different circuit components than the above embodiments, or adopt a circuit structure different from the above embodiments, and the present application does not limit this.

[0231] The following describes the positional relationship between the electrode 1 and the electrode 2 provided in the embodiment of the present application and the skin contact point.

[0232] FIG6A shows a schematic diagram of the positional relationship of human chest tissue provided in an embodiment of the present application.

[0233] As shown in FIG6A , the heart can be located in the chest tissue, and the heart impedance can be equivalent to the impedance of the chest tissue, which can also be referred to as the user's body impedance. In the human body, the upper part of the chest tissue is the user's neck, the lower part of the chest tissue is the user's abdomen, the left side of the chest tissue is the user's left hand, and the right side of the chest tissue is the user's right hand. It should be noted that in the embodiment of the present application, the upper, lower, left, and right sides of the chest tissue are determined based on the blood flow direction of the human body, rather than based on the actual spatial position of the human body parts. That is, the user's left hand is always located on the left side of the chest tissue; the user's right hand is always located on the right side of the chest tissue; the user's head is always located above the chest tissue; and the user's abdomen is always located below the chest tissue.

[0234] In the embodiment of the present application, the contact point between electrode 1 and the skin can be referred to as contact point 1, and the contact point between electrode 2 and the skin can be referred to as contact point 2. When contact point 1 and contact point 2 are respectively located at the two ends of the chest tissue (for example, above and below, or left and right), the impedance between electrode 1 and electrode 2 can be considered as cardiac impedance. Therefore, when the electronic device 100 performs cardiac function monitoring, electrode 1 and electrode 2 need to meet the following monitoring conditions: electrode 1 and electrode 2 are respectively located at the two ends of the chest tissue.

[0235] The following describes the location distribution of various contact points provided in the embodiments of the present application in conjunction with specific scenarios.

[0236] In some application scenarios, the electronic device 100 may be an earphone 10. FIG6B shows a schematic diagram of the distribution of contact points between electrodes on the earphone 10 and the skin during cardiac function monitoring.

[0237] As shown in FIG6B , when a user uses the earphone 10 shown in FIG2A to perform cardiac function monitoring, the user can wear the right earphone 12 on the right ear and place the left earphone 11 against the abdomen, so that the electrodes on the left earphone 11 (e.g., electrodes 1 and 3) can contact the skin of the abdomen, and the electrodes on the right earphone 12 (e.g., electrodes 2 and 4) can contact the skin of the right ear. In this case, the contact point 1 between the electrode 1 on the left earphone 11 and the skin is located on the abdomen, and the contact point 2 between the electrode 2 on the right earphone 12 and the skin is located on the right ear. Since the abdomen is below the chest tissue and the right ear is above the chest tissue, contact points 1 and 2 are respectively located above and below the chest tissue, satisfying the monitoring conditions in the embodiment shown in FIG6A . At this time, the impedance between electrode 1 and electrode 2 can be regarded as cardiac impedance, and measuring the voltage and current between electrode 1 and electrode 2 can determine the user's cardiac impedance.

[0238] It can be understood that the embodiment shown in Figure 6B is only an example. In the embodiment of the present application, the user can also use the earphone 10 shown in Figures 2B and 2C above to measure cardiac function. Moreover, the user can also measure the user's cardiac function through other measurement methods, such as wearing the left earphone 11 on the left ear, and the electrode on the right earphone 12 contacts the abdominal skin, or, the left hand contacts the electrode of the left earphone 11, and the right hand contacts the electrode of the right earphone 12, etc. This application does not limit this.

[0239] In some application scenarios, the electronic device 100 may be a watch 20 . FIG6C shows a schematic diagram of the distribution of contact points between the electrodes on the watch 20 and the skin during cardiac function monitoring.

[0240] As shown in Figure 6C, when a user uses the watch 20 shown in Figure 3A to measure cardiac function, the user can place the ends of the watchband 22 in contact with the user's chest and abdomen, respectively, so that the electrodes on one end of the watchband 22 (e.g., electrodes 1 and 3) can contact the skin on the user's chest, and the electrodes on the other end of the watchband 22 (e.g., electrodes 2 and 4) can contact the skin on the user's abdomen. In this case, point 1 between electrode 1 and the skin is located on the chest, and point 2 between electrode 2 and the skin is located on the abdomen. Since the abdomen is located below the thoracic tissue and the chest is located above the thoracic tissue, contact points 1 and 2 are located above and below the thoracic tissue, respectively, meeting the monitoring conditions in the embodiment shown in Figure 6A. In this case, the impedance between electrodes 1 and 2 can be considered as cardiac impedance, and measuring the voltage and current between electrodes 1 and 2 can determine the user's cardiac impedance. It should be noted that in the scenario shown in Figure 6C, the length of the watchband 22 must at least span the upper and lower ends (or left and right ends) of the thoracic tissue to ensure that electrodes 1 and 2 can detect the user's cardiac impedance. Furthermore, while ensuring that the distance between electrodes 1 and 2 is greater than the ends of the chest tissue, the distance between electrodes 1 and 2 should be sufficiently small to ensure that contact points 1 and 2 are sufficiently close to the heart, thereby obtaining more accurate measurement results. It will be appreciated that, compared to the watch 20 shown in FIG3A , the connection between the left earphone 11 and the right earphone 12 in the above embodiment is longer, making it easier to ensure that electrodes 1 and 3 span the ends of the chest tissue.

[0241] FIG6D shows another schematic diagram of the distribution of contact points between the electrodes on the watch 20 and the skin during cardiac function monitoring.

[0242] As shown in FIG6D , when a user uses the watch 20 shown in FIG3B and FIG3C to measure cardiac function, the user can wear the watch 20 on a wrist (e.g., the left wrist) so that the electrodes on the back of the movement 21 (e.g., electrodes 1 and 3) can contact the user's wrist. At the same time, the user can place the fingers of the other hand (i.e., the right hand) in contact with the electrodes on the keypad (e.g., electrodes 2 and 4). In this case, the contact point 1 between electrode 1 and the skin is located on the user's left wrist, and the contact point 2 between electrode 2 and the user is located on the user's right finger. Since the left hand is located on the left side of the chest tissue and the right hand is located on the right side of the chest tissue, contact points 1 and 2 are located on the left and right sides of the chest tissue, respectively, meeting the monitoring conditions in the embodiment shown in FIG6A . At this point, the impedance between electrode 1 and electrode 2 can be regarded as cardiac impedance, and measuring the voltage and current between electrode 1 and electrode 2 can determine the user's cardiac impedance.

[0243] It should be noted that the watch 20 in the embodiments shown in Figures 3D to 3E can also measure the user's cardiac impedance in a manner similar to the embodiment shown in Figure 6D. In this case, the user's wrist wearing watch 20 can contact one or more electrodes on the watchband 22, and the user's other hand (i.e., the hand not wearing watch 20) can contact the electrodes on the buttons. In this way, the contact points between electrodes 1 and 2 and the user's skin are located on the user's left and right hands, respectively. Therefore, contact points 1 and 2 are located on the left and right sides of the chest tissue, respectively, meeting the monitoring conditions in the embodiment shown in Figure 6A. In this case, the impedance between electrodes 1 and 2 can be regarded as cardiac impedance, and measuring the voltage and current between electrodes 1 and 2 can determine the user's cardiac impedance.

[0244] It should be understood that the embodiments shown in Figures 6C and 6D are merely two examples. In the embodiments of this application, users can also use wearable devices such as wristbands to measure cardiac function using the methods shown in the above embodiments. This application does not limit the specific form of the wearable device. Furthermore, users can also use other measurement methods to measure their cardiac function, such as contacting the electrodes at both ends of the strap 22 with both hands, etc. This application does not limit this.

[0245] In some application scenarios, the electronic device 100 may be a mobile phone 30 . FIG6E shows a schematic diagram of the distribution of contact points between electrodes on the mobile phone 30 and the skin during cardiac function monitoring.

[0246] For example, as shown in FIG6E , when a user uses the mobile phone 30 shown in FIG4A to measure cardiac function, the user can hold the mobile phone 30 with their left hand so that their left hand contacts one or more electrodes (e.g., electrodes 1 and 3). At the same time, the user can place their right hand fingers in contact with one or more other electrodes of the mobile phone 30 (e.g., electrodes 2 and 4). In this case, point 1, where electrode 1 contacts the skin, is located on the left hand, and point 2, where electrode 2 contacts the skin, is located on the right hand. Since the left hand is located on the left side of the chest tissue and the right hand is located on the right side of the chest tissue, contact points 1 and 2 are located on the left and right sides of the chest tissue, respectively, satisfying the monitoring conditions in the embodiment shown in FIG6A . At this point, the impedance between electrode 1 and electrode 2 can be considered as cardiac impedance, and measuring the voltage and current between electrode 1 and electrode 2 can determine the user's cardiac impedance.

[0247] It is understandable that the embodiment shown in Figure 6E is only an example. In the embodiment of the present application, the user can also measure cardiac function using the method shown in the above embodiment through an electronic device such as a tablet computer, or use the mobile phone 30 shown in Figure 4B to measure cardiac function. This application does not limit this.

[0248] In some application scenarios, the electronic device 100 may be the earphone 10 shown in FIG2C , and the electronic device 200 may be a mobile phone provided with electrodes (e.g., the mobile phone 30 shown in FIG4A or FIG4B ). FIG6F shows a schematic diagram of the distribution of contact points between the electrodes in the health monitoring system 1000 and the skin during a monitoring process.

[0249] As shown in FIG6F , the user can wear the earphone 10 shown in FIG2C , and at the same time, the user can hold the mobile phone 30 with one hand. The earphone 10 is a wired earphone, and the other end of the earphone 10 is connected to the mobile phone 30. When the user wears the left earphone 11 and the right earphone 12, the user can hold the mobile phone 30 with the left hand (or right hand). In this case, the electrodes on the user's right earphone 12 can contact the right ear, and the electrodes on the mobile phone 30 can contact the user's left hand. Since the right ear is located on the right side of the chest tissue and the left hand is located on the left side of the chest tissue, the electrodes on the right earphone 12 and the electrodes on the mobile phone 30 are respectively located on the left and right sides of the chest tissue, meeting the monitoring conditions in the embodiment shown in FIG6A . At this time, the impedance between the electrodes on the right earphone 12 and the electrodes on the mobile phone 30 can be regarded as the cardiac impedance. Measuring the voltage and current between these two electrodes can determine the user's cardiac impedance.

[0250] It should be noted that in the application scenario shown in Figure 6F, the electrodes on the earphone 10, the electrodes on the mobile phone 30, and the connecting wires between the earphone 10 and the mobile phone 30 can be constructed into a monitoring circuit as shown in Figure 5B or 5D above, and other circuit components in the monitoring circuit can be located in the earphone 10 or the mobile phone 30, and this application does not limit this.

[0251] It is understandable that the embodiment shown in Figure 6F is only an example of how the user's cardiac impedance can be determined through multiple devices. In an embodiment of the present application, the user can also use a wearing method and a holding method that are different from the above-mentioned embodiment. For example, the user can wear the left earphone 11 and hold the mobile phone 30 in the right hand at the same time, and determine the user's cardiac impedance based on the electrodes on the left earphone 11 and the electrodes on the mobile phone 30. This application is not limited here. The specific process of the earphone 10 and the mobile phone 30 executing a monitoring method provided in an embodiment of the present application can refer to the relevant description in the embodiment shown in Figure 12A below, which will not be described in detail here.

[0252] The following describes a monitoring method process provided in an embodiment of the present application.

[0253] FIG7 shows a flow chart of an execution monitoring method provided in an embodiment of the present application.

[0254] As shown in FIG7 , the specific process of the electronic device 100 executing the monitoring method may include the following steps:

[0255] S701, the electronic device 100 starts cardiac function monitoring.

[0256] In some embodiments, the electronic device 100 can receive and respond to the user's operation 1 on the electronic device 100 to turn on cardiac function monitoring. Operation 1 can be a preset operation, and when the device form of the electronic device 100 is different, operation 1 can also be different. For example, if the electronic device 100 is an earphone (such as earphone 10), operation 1 can be a double-click operation of the user on the earphone 10 (left earphone 11 or right earphone 12), or a pressing operation on a designated button on the earphone 10, etc. If the electronic device 100 is a wearable device such as a watch 20, operation 1 can be an operation of the user on a button on the watch 20, or an operation on a designated control displayed on the display screen of the watch 20 (such as a cardiac function measurement control in a health application, etc.). If the electronic device 100 is a mobile phone 30, operation 1 can also be an operation on a designated control displayed on the display screen 31 of the mobile phone 30 (such as a cardiac function measurement control in a health application, etc.), etc.

[0257] In other embodiments, the electronic device 100 may also receive and respond to a start-up instruction sent by the electronic device 200 to start cardiac function monitoring. It should be noted that in this case, the electronic device 100 may establish a communication connection with the electronic device 200, which may be a wired communication connection or a wireless communication connection. For example, if the electronic device 100 is the headset 10 in the embodiment shown in Figure 2A or Figure 2B above, the communication connection between the electronic device 100 and the electronic device 200 may be a wireless communication connection such as a Bluetooth connection or a StarFlash connection; if the electronic device 100 is the headset 10 shown in Figure 2C above, the communication connection between the electronic device 100 and the electronic device 200 may be a wired connection; if the electronic device 100 is the mobile phone 30 in the embodiment shown in Figure 4B above, the communication connection between the electronic device 100 and the electronic device 200 may be a Bluetooth connection or a local area network connection, etc. It will be understood that the embodiments herein are merely examples. In the embodiments of the present application, the communication connection between the electronic device 100 and the electronic device 200 may also be a communication connection different from the above embodiments, and the present application does not limit this.

[0258] In some embodiments, after receiving the user's operation 1 or receiving a start command sent by the electronic device 200, the electronic device 100 may output an operation prompt, which is used to inform the user of the positional relationship between the electrodes on the electronic device 100 and the user during cardiac function monitoring. The electronic device 100 may use any one or more methods, such as text, pictures, animations, voice, flashing indicator lights, vibrations, etc., to inform the user of the positional relationship between the electrodes and the user, so that the electronic device 100 can determine the user's cardiac impedance.

[0259] For example, if the electronic device 100 is the earphone 10 shown in FIG. 2A , the operation prompt may be a voice announcement: "Please wear one earphone and place the other earphone on the skin of the abdomen"; if the electronic device 100 is the watch 20 shown in FIG. 3B and FIG. 3C , the operation prompt may be text displayed on the display: "Please wear the watch and place the fingers of your other hand on the electrodes," etc. It will be understood that the various embodiments herein are merely illustrative of the various ways in which operation prompts may be output. In the embodiments of the present application, the output method of the operation prompt may be different from that of the aforementioned embodiments, and the specific content of the operation prompt may also be different from that of the aforementioned embodiments, and the present application does not limit these.

[0260] In other embodiments, the electronic device 100 may also enable cardiac function monitoring when it detects that a monitoring condition is met. Optionally, when it detects that a monitoring condition is met, an operation prompt may be output, which is used to inform the user of the positional relationship between the electrodes on the electronic device 100 and the user during cardiac function monitoring. The monitoring conditions may include, but are not limited to, any one or more of the following: detecting an abnormal physiological state of the user (e.g., a heart rate that does not fall within a preset heart rate range), detecting an abnormal psychological state of the user (e.g., being frightened), detecting that the user is exercising, detecting that the user has insomnia, detecting an abnormal body posture of the user (e.g., falling), detecting an abnormality in the user's sports equipment, detecting that the user's location is within a preset area (e.g., the user is at a high altitude), etc.

[0261] The following describes a specific method in which the electronic device 100 determines whether the monitoring conditions are met.

[0262] In some embodiments, the electronic device 100 can obtain user information and determine whether the electronic device 100 meets the monitoring conditions based on the user information. User information may include but is not limited to any one or more of the following: physiological information, psychological information, motion information, sports equipment information, posture information, location information, and interaction information. Among them, physiological information can be used to characterize the user's physiological state, and physiological information may include but is not limited to any one or more of the following: blood oxygen concentration, heart rate, blood sugar, body temperature, blood pressure, disease information, etc.; psychological information can be used to characterize the user's psychological state, and psychological information may include but is not limited to any one or more of the following: stress value, low mood, stable mood, high mood, being frightened, etc.; motion information can be used to characterize the user's motion state, and motion information may include but is not limited to any one or more of the following: swimming, diving, cycling, running, climbing, skipping rope, yoga, etc.; sports equipment information can be used to characterize the state of sports equipment, and sports equipment information may include but is not limited to any one or more of the following: oxygen remaining in the oxygen cylinder, weight of the smart backpack , the resistance of the bicycle, etc.; posture information can be used to characterize the user's body posture, and the posture information may include but is not limited to any one or more of the following: falling, stepping on air, standing still, etc.; location information can be used to characterize the user's location, and the location information may include but is not limited to any one or more of the following: the user's geographic location, the latitude and longitude information of the user's location, the altitude information of the user's location, the depth information of the user's location, etc.; interaction information may include interaction operations between the user and the electronic device 100 (or electronic device 200), such as receiving an operation from the user to turn on monitoring, etc., and interaction information may also include communication interactions between the electronic device 100 and the electronic device 200, such as a startup instruction sent by the electronic device 200 to the electronic device 100, etc.

[0263] It should be noted that in the embodiment of the present application, the way in which the electronic device 100 obtains user information may include but is not limited to the following ways: the electronic device 100 detects user information, the electronic device 100 receives user information sent by the electronic device 200, and the electronic device 100 receives and obtains user information in response to the user entering user information (such as disease information).

[0264] The following describes some methods for electronic devices 100 to detect user information provided by embodiments of the present application.

[0265] For example, the electronic device 100 can detect the user's motion information and posture information through devices such as gyroscope sensors (also called gyroscopes) and acceleration sensors; the electronic device 100 can detect the user's heart rate, blood oxygen concentration, blood pressure and other physiological information through devices such as photoplethysmography (PPG) modules; the electronic device 100 can also collect the user's facial expressions through a camera, and determine the user's emotional state through algorithm models such as image analysis and facial expression analysis; the electronic device 100 can also determine the user's pressure value and other psychological information based on physiological information; the electronic device 100 can also detect the user's interaction information through a touch sensor; the electronic device 100 can detect the user's location information through a position sensor (such as a global positioning chip, etc.); the electronic device 100 can also detect the air pressure of the user's environment based on a pressure sensor, and determine the user's altitude and other location information based on the pressure value, and so on.

[0266] It will be understood that the embodiments herein are merely examples. In the embodiments of the present application, the electronic device 100 may include more, fewer, or different devices than those in the above-described embodiments. Moreover, the electronic device 100 may also collect user information through sensors or other devices that are different from those in the above-described embodiments. This application does not limit this.

[0267] The following describes some methods for electronic devices 100 provided in embodiments of the present application to determine whether monitoring conditions are met based on user information.

[0268] As another example, the electronic device 100 can determine whether the physiological information meets any of the following items: the heart rate does not belong to the preset heart rate range, the blood pressure does not belong to the preset blood pressure range, the blood oxygen concentration does not belong to the preset blood oxygen concentration range, the body temperature does not belong to the preset body temperature range, etc.; if the physiological information meets any of the above items, the electronic device 100 can determine that the user's physiological state is abnormal, that is, determine that the monitoring conditions are met.

[0269] For another example, the electronic device 100 may determine whether the user is experiencing insomnia based on motion information, posture information, and a preset sleep period (e.g., 23:00-06:00). Alternatively, the electronic device 100 may determine whether the user is experiencing insomnia based on user interaction information during the sleep period. If the user is experiencing insomnia, the electronic device 100 may determine that the monitoring conditions are met.

[0270] As another example, the electronic device 100 can determine whether the user's motion state meets any of the following based on the motion information: diving state, climbing state, cycling state, yoga state, swimming state, running state, etc.; if the motion state meets any of the above items, the electronic device 100 can determine that the monitoring conditions are met.

[0271] As another example, the electronic device 100 can determine whether the psychological information meets any of the following conditions: the user is frightened, the user is depressed, the user is in high spirits, etc.; if the psychological information meets any of the above conditions, the electronic device 100 can determine that the user's psychological state is abnormal, that is, it determines that the monitoring conditions are met.

[0272] As another example, the electronic device 100 can determine whether any of the following is met based on the location information: the user is in a high altitude area, the user is in a deep water area, etc.; if the location information meets any of the above items, the electronic device 100 can determine that the user's location is within the preset area, that is, it is determined that the monitoring conditions are met.

[0273] As another example, the electronic device 100 can determine whether the posture information meets any of the following conditions: the user falls, the user steps on air, etc. If the posture information meets any of the above conditions, the electronic device 100 can determine that the user's body posture is abnormal, that is, the monitoring condition is met.

[0274] As another example, the electronic device 100 can determine whether the sports equipment information meets any of the following conditions: the remaining oxygen in the oxygen cylinder is lower than the preset oxygen amount, the bicycle's travel resistance is greater than the preset resistance, the weight of the smart backpack is greater than the preset weight, etc.; if the sports equipment information meets any of the above conditions, the electronic device 100 can determine that the user's sports equipment is abnormal, that is, the monitoring conditions are met.

[0275] It will be understood that the above embodiments are merely illustrative of various ways of determining whether monitoring conditions are met based on user information. In the embodiments of the present application, the electronic device 100 may also determine whether monitoring conditions are met based on various types of user information. The electronic device 100 may also determine whether monitoring conditions are met based on other information in the user information, and the monitoring conditions may also include more, fewer, or different conditions than those in the above embodiments. This application does not limit these conditions.

[0276] In some application scenarios, if the electronic device 100 is an earphone 10, and before cardiac function monitoring is turned on, the earphone 10 is playing audio, then after cardiac function monitoring is turned on, the earphone 10 can pause playing the audio.

[0277] S702, the electronic device 100 outputs prompt 1, which is used to prompt the user to start monitoring heart function.

[0278] Step S702 is an optional step.

[0279] The electronic device 100 may output the prompt 1 in any one or more ways, such as display screen display, voice, vibration, and indicator light flashing.

[0280] For example, if the electronic device 100 is an earphone 10, the earphone 10 can output the prompt 1 in a voice manner, such as playing the voice "Cardiac function monitoring starts, please ensure that the electrodes are in good contact with the skin!"; another example, if the electronic device 100 is a watch 20, the watch 20 can output the prompt 1 by displaying it on the display screen, such as displaying the text "Cardiac function monitoring starts!" on the display screen; another example, if the electronic device 100 is a mobile phone 30, the mobile phone 30 can output the prompt 1 by displaying it on the display screen and vibrating it, for example, while displaying the text "Cardiac function monitoring starts!", it vibrates through a motor to remind the user to check the prompt 1. It will be understood that the multiple embodiments herein are merely illustrative of the various ways in which the prompt 1 can be output. In the embodiments of the present application, the output method of the prompt 1 may also be different from that of the above embodiments, and the specific content of the prompt 1 may also be different from that of the above embodiments, and the present application does not limit them here.

[0281] S703: The electronic device 100 determines whether the electrodes in the monitoring circuit are in good contact with the skin.

[0282] Steps S703 to S704 are optional steps.

[0283] In some embodiments, the monitoring circuit in the electronic device 100 may be the monitoring circuit shown in FIG. 5B . In this case, after turning on cardiac function monitoring, the electronic device 100 may control the analog switch S0 in the monitoring circuit to close and determine whether there is current in the current monitoring circuit. If it is determined that there is current in the monitoring circuit, it is determined that the electrode is in good contact with the skin, and the electronic device 100 may execute the following step S705. If it is determined that there is no current in the monitoring circuit, it is determined that the electrode is in poor contact with the skin, and the electronic device 100 may execute the following step S704.

[0284] In some embodiments, the electronic device 100 may also pre-set a current threshold and determine whether the electrode is in good contact with the skin based on whether the current in the monitoring circuit reaches the current threshold. This application does not limit this.

[0285] In other embodiments, the monitoring circuit in the electronic device 100 may also be the monitoring circuit shown in Figures 5D to 5E above. In this case, the specific process of the electronic device 100 determining whether the electrode is in good contact with the skin may include the following steps:

[0286] 1. The electronic device 100 controls the analog switch 1 to connect the port A1.

[0287] 2. The electronic device 100 controls the analog switch 2 to connect the port B2.

[0288] After starting cardiac function monitoring, the electronic device 100 can send instruction 1 to analog switch 1 to instruct analog switch 1 to connect port A1. In addition, the electronic device 100 can also send instruction 2 to analog switch 2 to instruct analog switch 2 to connect port B2.

[0289] 3. The electronic device 100 determines whether there is current between the electrode 1 and the electrode 3.

[0290] When analog switch 1 is connected to port A1 and analog switch 2 is connected to port B2, if electrodes 1 and 3 are in good contact with the user's skin, the monitoring circuit can form a loop as shown in FIG. 5F between electrodes 1 and 3. When a loop is formed between electrodes 1 and 3, electronic device 100 can determine that current exists between electrodes 1 and 3. When a loop is not formed between electrodes 1 and 3, no current exists between electrodes 1 and 3.

[0291] Therefore, the electronic device 100 can determine whether the electrode 1 and the electrode 3 are in good contact with the skin based on whether there is current between the electrode 1 and the electrode 3 (or based on whether the current between the electrode 1 and the electrode 3 is greater than a preset threshold).

[0292] If the electronic device 100 determines that there is current between the electrode 1 and the electrode 3 , the electronic device 100 may perform the following step 5 to determine whether the electrode 1 and the electrode 3 are in good contact with the skin.

[0293] If the electronic device 100 determines that there is no current between the electrode 1 and the electrode 3 , the electronic device 100 may perform the following step 4 to determine whether at least one of the electrodes 1 and 3 has poor contact with the user's skin.

[0294] 4. At least one of the electrodes between electrode 1 and electrode 3 has poor contact with the skin.

[0295] 5. Both electrodes 1 and 3 are in good contact with the skin.

[0296] When it is determined that both electrode 1 and electrode 3 are in good contact with the skin, the electronic device 100 may perform the following step 6.

[0297] 6. The electronic device 100 controls the analog switch 1 to connect the port A2.

[0298] 7. The electronic device 100 controls the analog switch 2 to connect the port B1.

[0299] After determining that electrodes 1 and 3 are in good contact with the skin, the electronic device 100 can send instruction 3 to analog switch 1, which is used to instruct analog switch 1 to connect to port A2. At the same time, the electronic device 100 can also send instruction 4 to analog switch 2, which is used to instruct analog switch 2 to connect to port B1.

[0300] 8. The electronic device 100 determines whether there is current between the electrode 2 and the electrode 4.

[0301] When analog switch 1 is connected to port A2 and analog switch 2 is connected to port B1, if electrodes 2 and 4 are in good contact with the user's skin, the monitoring circuit can form a loop as shown in FIG. 5G between electrodes 2 and 4. When a loop is formed between electrodes 2 and 4, electronic device 100 can determine that current exists between electrodes 2 and 4. When a loop is not formed between electrodes 2 and 4, no current exists between electrodes 2 and 4.

[0302] Therefore, the electronic device 100 can determine whether the electrodes 2 and 4 are in good contact with the skin based on whether there is current between the electrodes 2 and 4 (or based on whether the current between the electrodes 2 and 4 is greater than a preset threshold).

[0303] If the electronic device 100 determines that there is current between the electrode 2 and the electrode 4 , the electronic device 100 may perform the following step 10 to determine that both the electrode 2 and the electrode 4 are in good contact with the skin.

[0304] If the electronic device 100 determines that there is no current between the electrode 2 and the electrode 4 , the electronic device 100 may perform the following step 9 to determine whether at least one of the electrodes 2 and 4 has poor contact with the user's skin.

[0305] 9. At least one of the electrodes between electrode 2 and electrode 4 has poor contact with the skin.

[0306] 10. Both electrodes 2 and 4 are in good contact with the skin.

[0307] It can be understood that the above two embodiments are merely illustrative of two ways of determining whether the electrode is in good contact with the skin. In the embodiments of the present application, the monitoring circuit may also adopt a circuit structure or circuit components that are different from those in the above embodiments, and the method of determining whether the electrode is in good contact with the skin may also be changed accordingly according to changes in the monitoring circuit. This application does not limit this.

[0308] When it is determined that there is poor electrode contact, the electronic device 100 may execute the following step S704.

[0309] When it is determined that all electrodes are in good contact, the electronic device 100 may execute the following step S705 .

[0310] S704, the electronic device 100 outputs prompt 2, which is used to prompt the user that the electrode is not in good contact with the skin.

[0311] If the electronic device 100 determines that at least one electrode has poor contact with the skin, the electronic device 100 may output prompt 2, which may be used to prompt the user that the electrodes in the monitoring circuit have poor contact with the skin.

[0312] In some embodiments, prompt 2 may further prompt the user of the positional relationship between the electrode that has poor contact with the skin and the electronic device 100. For example, if the electronic device 100 determines that one of the electrodes 1 and 3 has poor contact, and the electronic device 100 is the earphone 10 shown in FIG2A above, prompt 2 may be "The left earphone has poor contact with the skin, please adjust the position of the left earphone"; for another example, if the electronic device 100 determines that one of the electrodes 2 and 4 has poor contact, and the electronic device 100 is the watch 20 shown in FIG3B to FIG3C above, prompt 2 may be "The finger has poor contact with the electrode, please adjust the finger position", etc.

[0313] The electronic device 100 may also output prompt 2 by using any one or more of the following methods: display screen display, voice, vibration, flashing indicator light, etc.

[0314] S705 , the electronic device 100 determines a cardiac impedance curve through a monitoring circuit. The cardiac impedance curve is used to represent the relationship between the user's cardiac impedance and time.

[0315] In some embodiments, after the electronic device 100 turns on cardiac function monitoring, it can determine the user's cardiac impedance curve through the monitoring circuit.

[0316] In other embodiments, the electronic device 100 may also determine the cardiac impedance curve of the user through the monitoring circuit after executing the above step S703 and determining that all electrodes in the monitoring circuit are in good contact with the skin.

[0317] Taking the monitoring circuit in the embodiment shown in FIG. 5B as an example, when all electrodes in the monitoring circuit are in good contact with the skin, the electronic device 100 can control the analog switch S0 to close, obtain a current curve through the excitation current generating unit, and use the voltage measuring unit to obtain a voltage curve. The voltage curve is used to represent the relationship between the voltage across the user's body and time. The user's cardiac impedance curve is determined based on the current and voltage curves. The user's cardiac impedance is equal to the ratio of the voltage across the user's body to the current flowing through the user's body.

[0318] Taking the monitoring circuit in the embodiment shown in Figures 5D to 5E above as an example, when all electrodes in the monitoring circuit are in good contact with the skin, the electronic device 100 can control analog switch S1 to connect to port A1, and at the same time, control analog switch S2 to connect to port B1. At this time, the monitoring circuit can form a loop between electrodes 1 and 2 and measure the current flowing through the user's body to obtain a current curve. At the same time, the monitoring circuit can also form a loop between electrodes 3 and 4 to measure the voltage across the user's body to obtain a voltage curve. Thereafter, the electronic device 100 can determine the current curve and voltage curve based on the monitoring circuit, and determine the user's cardiac impedance curve based on the current curve and voltage curve.

[0319] It can be understood that the above embodiments are just some examples. In the embodiments of the present application, the monitoring circuit may also adopt a monitoring circuit different from the embodiments shown in the above Figures 5B, 5D to 5E, and the present application does not limit this.

[0320] S706: The electronic device 100 determines a cardiac function index based on the cardiac impedance curve.

[0321] The cardiac impedance curve can be used to determine cardiac function indicators, which may include but are not limited to any one or more of the following: cardiac output, stroke volume, heart rate, and ejection fraction.

[0322] The specific process of the electronic device 100 determining cardiac output and stroke volume based on the cardiac impedance curve can be referred to the relevant description in the embodiment shown in Figure 8A below, and will not be described in detail here. In addition, since the ejection fraction refers to the ratio of the stroke volume to the total cardiac blood volume, the ejection fraction can be obtained based on the stroke volume and the total cardiac blood volume. In some embodiments, the total cardiac blood volume can be obtained by an estimation algorithm built into the electronic device 100. In other embodiments, the total cardiac blood volume can also be a preset value, which can be estimated based on the total cardiac blood volume data of multiple test subjects using algorithms such as deep learning.

[0323] S707: The electronic device 100 outputs the cardiac function index.

[0324] In some embodiments, the electronic device 100 may output the cardiac function indicator using one or more methods, such as display screen display, voice, vibration, and flashing indicator lights. For example, when the electronic device 100 outputs the cardiac function indicator using a display screen display, the interface displayed by the electronic device 100 may refer to the relevant descriptions of the embodiments shown in Figures 9A to 9C and 10A to 10C below.

[0325] In other embodiments, the electronic device 100 outputs the cardiac function indicator, which may also mean that the electronic device 100 sends an output instruction 1 to the electronic device 200. The output instruction 1 may include the cardiac function indicator, and the output instruction 1 can be used to instruct the electronic device 200 to output the cardiac function indicator.

[0326] In some embodiments, if the electronic device 100 is a headset 10, before outputting the cardiac function index, the electronic device 100 can determine the output method of the cardiac function index based on factors such as whether the user is wearing it, whether the electronic device 100 is connected to the electronic device 200, etc. The specific judgment process can refer to the relevant description in the embodiment shown in Figure 11 below, which will not be described in detail here.

[0327] In some embodiments, the electronic device 100 may store value intervals of different cardiac function indicators. For example, Table 1 shows the value intervals of cardiac function indicators stored in the electronic device 100 provided in an embodiment of the present application.

[0328] Table 1

[0329] As shown in Table 1, the electronic device 100 can store value ranges of multiple cardiac function indicators. For example, the value range of cardiac output can be 4.5-6 liters, the value range of stroke volume can be 60-80 ml, and the value range of heart rate can be 60-100 beats / minute.

[0330] It is understandable that the embodiment shown in Table 1 is only an example. In the embodiments of the present application, the cardiac function index may also include more, fewer, or different cardiac function indicators than the above embodiments, and the value range of the cardiac function index may also be different from the above embodiments. The present application does not limit this.

[0331] In some embodiments, after determining the cardiac function indicators, the electronic device 100 may determine the results for each cardiac function indicator based on the relationship between the actual value of the cardiac function indicator and a preset value range. For example, the results for cardiac output and stroke volume may be determined. The results may be normal or abnormal. Optionally, when the result is abnormal, the result may be further subdivided into various categories, such as high, low, excessively high, or excessively low.

[0332] For example, if the actual value of cardiac output is 7 liters, and the value range of cardiac output stored in the electronic device 100 is 4.5-6 liters, the electronic device 100 can determine that the user's cardiac output is high; if the actual value of stroke volume is 80 milliliters, and the value range of stroke volume stored in the electronic device 100 is 60-80 milliliters, the electronic device 100 can determine that the user's stroke volume is normal. It will be understood that the embodiments herein are merely two examples, and in the embodiments of the present application, the actual value and the preset value range of the cardiac function index may also be different from those in the above embodiments, and the present application does not limit them here.

[0333] After determining the determination result of each cardiac function index, the electronic device 100 may output the determination result of each cardiac function index at the same time as outputting the cardiac function index.

[0334] In some embodiments, the electronic device 100 may also determine a comprehensive determination result of the user's cardiac function based on the relationship between the actual value of the cardiac function indicator and a preset value range. The comprehensive determination result is used to indicate the user's cardiac function status, such as whether the user's cardiac function is normal. In other embodiments, the electronic device 100 may also determine a comprehensive determination result of the user's cardiac function based on the determination result of each cardiac function indicator. The comprehensive determination result may include normal and abnormal. Optionally, the abnormality may also include, but is not limited to, any one or more of the following: sub-health, disease risk, high risk, etc. For example, if the determination result of each cardiac function indicator of the user is normal, the comprehensive determination result may be normal; if the determination result of at least one cardiac function indicator of the user is abnormal, the comprehensive determination result may be abnormal.

[0335] After determining the comprehensive determination result, the electronic device 100 may output the comprehensive determination result while outputting the cardiac function index.

[0336] In some embodiments, the electronic device 100 may store value ranges for cardiac function indicators in different states. The user's state may include a resting state and an exercise state, and may optionally include, but is not limited to, any one or more of the following: a sleeping state, a high altitude state, a startled state, an oxygen-deficient state, a diving state, a meditative state, etc. The electronic device 100 may determine the user's state based on the user information. The specific content and acquisition method of the user information can be found in the relevant description of step S701 above and will not be repeated here.

[0337] Illustratively, Table 2 shows the value ranges of cardiac function indicators in different states stored in an electronic device 100 provided by an embodiment of the present application.

[0338] Table 2

[0339] As shown in Table 2, the electronic device 100 can store value ranges for multiple cardiac function indicators in different states. For example, in a resting state, the value range of cardiac output can be 4.5-6 liters, the value range of stroke volume can be 60-80 ml, and the value range of heart rate can be 60-100 beats / minute. In an exercise state, the value range of cardiac output can be 9-18 liters, the value range of stroke volume can be 90-120 ml, and the value range of heart rate can be 100-150 beats / minute.

[0340] It can be understood that the embodiment shown in Table 2 is only an example. In the embodiment of the present application, the electronic device 100 can also store more, less or different user status and cardiac function indicators than the above embodiments, and the value range of the cardiac function indicators can also be different from the above embodiments. This application does not limit this.

[0341] In this case, after turning on cardiac function monitoring (i.e., after step S701), the electronic device 100 can determine the user's state. For example, the electronic device 100 can determine whether the user is in a motion state based on a device such as an accelerometer or gyroscope, or determine whether the user is in a sleep state based on a sleep monitoring module, or determine the user's current state based on the user's state setting operation. This application does not limit the specific method by which the electronic device 100 determines the user's state.

[0342] After determining the current user state and the user's cardiac function index, the electronic device 100 can determine the determination results and / or the comprehensive determination result for each cardiac function index based on the relationship between the actual value of the cardiac function index and the value range of the cardiac function index in the current user state. The electronic device 100 can then output the determination results and / or the comprehensive determination result for each cardiac function index at the same time as outputting the cardiac function index.

[0343] In other embodiments, the electronic device 100 may output a status prompt while outputting cardiac function indicators. The status prompt is used to prompt the user of the current status and health advice in the current status. The user status can be determined based on user information. For example, if the electronic device 100 determines that the user is in a high altitude state based on the user's location information, the status prompt may be "You are currently in a high altitude area, it is recommended to reduce exercise"; another example, if the electronic device 100 determines that the user is in a sub-healthy state based on the user's physiological information, the status prompt may be "You are currently in poor physical condition, it is recommended that you avoid high-intensity exercise", etc. It can be understood that the embodiments here are just some examples. In the embodiments of the present application, the user status may also include more than the above embodiments, or different from the above embodiments, and the status prompt may include more, fewer or different status prompts than the above embodiments, and the present application does not limit them here.

[0344] By using the monitoring method provided in the embodiment of the present application, the user's cardiac function can be monitored at any time in the user's daily life, and the user's cardiac function indicators such as cardiac output and stroke volume can be obtained in real time.

[0345] In some embodiments, the electronic device 100 may also send the cardiac impedance curve to the electronic device 200, and the electronic device 200 may determine the cardiac function index based on the cardiac impedance curve. After determining the cardiac function index, the electronic device 200 may output the cardiac function index. In other embodiments, after determining the cardiac function index, the electronic device 200 may also send an output instruction 2 to the electronic device 100. The output instruction 2 may include the cardiac function index. The output instruction 2 may be used to instruct the electronic device 100 to output the cardiac function index. Optionally, the electronic device 200 may also determine a determination result based on the cardiac impedance curve. The specific content of the determination result can refer to the relevant description in step S707 shown in Figure 7 above. In this case, the electronic device 200 may also output the determination result, or the output instruction 2 may also include the determination result.

[0346] In this way, when the computing capability of the electronic device 100 is limited, the cardiac impedance curve can be determined by the electronic device 100 and the cardiac function index can be calculated by the electronic device 200 .

[0347] It will be understood that the embodiments herein are merely illustrative, and some of the steps in the method flow shown in FIG7 may be performed by the electronic device 200. In the embodiments of the present application, the electronic device 200 may also perform more, fewer, or different steps than those in the above embodiments, and the present application does not limit this.

[0348] In some embodiments, the electronic device 100 may also determine a current curve and a voltage curve, and send the current curve and voltage curve to the electronic device 200. The electronic device 200 then determines a cardiac impedance curve based on the current curve and the voltage curve, and then determines a cardiac function index based on the cardiac impedance curve. The current curve represents the relationship between the current flowing through the user's heart and time, and the voltage curve represents the relationship between the voltage across the user's heart and time.

[0349] The following describes a specific process for determining cardiac function indicators based on the cardiac impedance curve provided in an embodiment of the present application.

[0350] FIG8A shows a schematic diagram of a process for determining cardiac function indicators based on a cardiac impedance curve according to an embodiment of the present application.

[0351] As shown in FIG8A , the specific process of the electronic device 100 determining the cardiac function index based on the cardiac impedance curve may include the following steps:

[0352] S801: The electronic device 100 obtains characteristic points of a cardiac impedance curve.

[0353] Characteristic points of the cardiac impedance curve can include peaks and troughs. A peak is the local highest point on the curve, while a trough is the local lowest point. The peaks and troughs of the cardiac impedance curve represent the heart's systole, diastole, and pumping time. As the heart undergoes cyclical contraction and relaxation, blood flow in the thoracic tissue also undergoes cyclical changes, causing the impedance of the thoracic tissue to also vary cyclically. During systole, blood is ejected into the aorta, dilating the aortic lumen, increasing its cross-sectional area and blood volume. Because blood is a good conductor of electricity, the resistance of the thoracic tissue decreases, reducing cardiac impedance. During diastole, blood returns to the heart, causing the aortic lumen to contract, reducing its cross-sectional area and blood volume. This increases the resistance of the thoracic tissue and cardiac impedance. Therefore, cardiac impedance decreases during systole and increases during diastole.

[0354] According to the above analysis, from one peak point to the next trough point of the cardiac impedance curve, the user's cardiac impedance gradually decreases, and the heart completes a contraction; from one trough point to the next peak point of the cardiac impedance curve, the user's cardiac impedance gradually increases, and the heart completes a diastole. Therefore, the electronic device 100 can determine the user's heart systole, diastole, and heart pumping time based on the time corresponding to the peak point and the time corresponding to the trough point in the cardiac impedance curve. The heart pumping time is the time when the heart ends diastole and begins to contract. In some embodiments, parameters such as the heart's systole, diastole, and heart pumping time can be used to calculate the user's heart rate, and can also be used to calculate cardiac output and stroke volume.

[0355] For example, FIG8B shows a schematic diagram of a cardiac impedance curve in a two-dimensional coordinate system provided in an embodiment of the present application.

[0356] As shown in FIG8B , the two-dimensional coordinate system may include a horizontal axis and a vertical axis. The horizontal axis may represent time, and the vertical axis may represent the magnitude of cardiac impedance. The cardiac impedance curve may be curve Q in the two-dimensional coordinate system. In curve Q, multiple peak points may be included, such as peak point P1 and peak point P2. Curve Q may also include multiple trough points, such as trough point G1 and trough point G2. Among them, the two peak points adjacent to trough point G1 are peak point P1 and peak point P2, and the two trough points adjacent to peak point P2 are trough point G1 and trough point G2. In addition, the coordinates of the above-mentioned multiple feature points in the two-dimensional coordinate system are peak point P1 (x1, y1), trough point G1 (x2, y2), peak point P2 (x3, y3), trough point G2 (x4, y4), and x1 <x2<x3<x4。

[0357] When the cardiac impedance curve is curve Q as shown in Figure 8B , the user's heart systole can be the time difference between peak point P1 and trough point G1 (x2-x1), the time difference between peak point P2 and trough point G2 (x4-x3), or the average of these two time differences, i.e., (x2-x1+x4-x3) / 2. The user's heart diastole can be the time difference between trough point G1 and peak point P2, i.e., (x3-x2). The corresponding moments of peak points P1 and P2 can be considered the heart's pumping moment.

[0358] It is understood that the embodiment shown in FIG8B is merely an example of how to determine the systolic period, diastolic period, and pumping time of the heart based on the characteristic points of the cardiac impedance curve. In the embodiment of the present application, the cardiac impedance curve may also be a cardiac impedance curve different from that of the above embodiment, and the electronic device 100 may also determine the systolic period, diastolic period, and pumping time of the heart based on more, fewer, or different characteristic points than those of the above embodiment, and the present application does not limit this.

[0359] S802: The electronic device 100 determines the user's heart rate based on the cardiac impedance curve.

[0360] Each time the heart beats, it completes one contraction and one relaxation. In some embodiments, the electronic device 100 can determine the user's heart rate based on the sampling time length of the cardiac impedance curve and the number of peaks and troughs in the sampling interval.

[0361] For example, taking the cardiac impedance curve Q shown in FIG8B , if the sampling time interval is [x1, x3], then within this sampling interval, curve Q includes two peaks P1 and P2 and one trough G1. The time required for the user's heart to beat once can be (x3 - x1). The electronic device 100 can then calculate the number of heartbeats per minute based on the time required for a single heartbeat.

[0362] In some embodiments, the electronic device 100 may also determine the time required for a single heart beat based on the diastole and systole of the heart, and calculate the number of heart beats per minute to obtain the user's heart rate.

[0363] In other embodiments, the electronic device 100 may also determine the user's heart rate based on the duration of the sampling interval and the number of times the heart pumps blood during the sampling interval.

[0364] S803: The electronic device 100 obtains a first-order derivative curve of the cardiac impedance curve.

[0365] The electronic device 100 can derive the cardiac impedance curve to obtain a first-order derivative curve of the cardiac impedance curve (hereinafter referred to as the first-order derivative curve).

[0366] S804: The electronic device 100 obtains characteristic points of the first-order derivative curve.

[0367] The characteristic points of the first-order derivative curve may include peak points, trough points, and points where the first-order derivative value is zero (also called zero points). The characteristic points of the first-order derivative curve may characterize the rate of change and trend of change of cardiac impedance.

[0368] For example, FIG8C shows a schematic diagram of a first-order derivative curve of a cardiac impedance curve in a two-dimensional coordinate system provided in an embodiment of the present application.

[0369] As shown in FIG8C , the two-dimensional coordinate system may include an abscissa axis and a ordinate axis, wherein the abscissa axis may represent time and the ordinate axis may represent the first-order derivative of cardiac impedance. The first-order derivative curve may be a curve L in the two-dimensional coordinate system. The curve L may include a plurality of characteristic points, for example, a peak point P3, a zero point Z, and a trough point G3, wherein the coordinates of the characteristic points are respectively a peak point P3 (m1, n1), a zero point Z (m2, 0), a trough point G3 (m3, n3), and m1. <m2<m3,n1> 0>n2.

[0370] According to the characteristics of the first-order derivative, in the time period [m1, m2] corresponding to the peak point P3 to the zero point Z, the cardiac impedance gradually increases, and the growth rate becomes slower and slower; in the time period [m2, m3] corresponding to the zero point Z to the trough point G3, the cardiac impedance gradually decreases, and the decrease becomes faster and faster.

[0371] S805 , the electronic device 100 determines the user's cardiac output and stroke volume based on the user's heart rate, characteristic points of the cardiac impedance curve, and characteristic points of the first-order derivative curve using a cardiac function evaluation model.

[0372] The electronic device 100 may store one or more cardiac function assessment models, which may be trained using algorithmic models such as XGBoost and CNN convolutional neural networks. The electronic device 100 may input the heart rate, characteristic points of the cardiac impedance curve, and characteristic points of the first-order derivative curve into the cardiac function assessment model, and the cardiac function assessment model may determine the cardiac output and stroke volume based on the above inputs. In other embodiments, the electronic device 100 may also use parameters such as the heart's diastole, systole, and pumping time as inputs to the cardiac function assessment model, so that the cardiac function assessment model can calculate the cardiac output and stroke volume.

[0373] For example, the cardiac function assessment model can calculate cardiac output and stroke volume using the Kubicek formula based on heart rate, characteristic points of the cardiac impedance curve, characteristic points of the first-order derivative curve, etc.

[0374] It is understandable that the embodiment shown in FIG8A is only an example. In the embodiment of the present application, the electronic device 100 may also adopt a method different from the above embodiment to determine the cardiac output and stroke volume based on the cardiac impedance curve. The present application does not limit this.

[0375] In some embodiments, electronic device 100 may also send the cardiac impedance curve to electronic device 200, which may determine the user's cardiac function index through the same or similar process as shown in FIG8A above. After determining the cardiac function index, electronic device 200 may output the cardiac function index or send the cardiac function index to electronic device 100.

[0376] The following is a schematic diagram of an interface for outputting two groups of cardiac function indicators provided in an embodiment of the present application.

[0377] In some application scenarios, the electronic device 100 (or electronic device 200) for outputting cardiac function indicators may be a mobile phone, a tablet computer, a computer, or other electronic device.

[0378] For example, if the electronic device 100 is the mobile phone 30 in the embodiment shown in FIG. 4A , the electronic device 100 may display an output interface 900 as shown in FIG. 9A after determining the cardiac function index.

[0379] As shown in Figure 9A, output interface 900 may include multiple cardiac function indicators, such as a stroke volume of 75 ml, a cardiac output of 4.5 L / min, and a heart rate of 60 beats / min. Optionally, electronic device 100 may also display the results of the cardiac function indicators near the cardiac function indicators, such as determination results 901, 902, and 903. Determination result 901 is displayed near the stroke volume to indicate whether the stroke volume is normal; determination result 902 is displayed near the cardiac output to indicate whether the cardiac output is normal; and determination result 903 is displayed near the heart rate to indicate whether the heart rate is normal. In the embodiment shown in Figure 9A, the user's cardiac output, stroke volume, and heart rate are all normal. Optionally, output interface 900 may also display an assessment result 904, which may be the text "Your cardiac ejection function is normal. Exercise regularly to stay healthy."

[0380] As another example, if the electronic device 100 is a mobile phone 30 , the electronic device 100 may also display an output interface 910 as shown in FIG9B after determining the cardiac function index.

[0381] As shown in FIG9B , the output interface 900 may include multiple cardiac function indicators, such as a stroke volume of 50 ml, a cardiac output of 3.0 L / min, and a heart rate of 60 beats / min. Optionally, the electronic device 100 may also display the results of the cardiac function indicators near the cardiac function indicators, such as determination results 911, 912, and 913. Each of these determination results may be used to indicate whether the corresponding cardiac function indicator is normal. In the embodiment shown in FIG9B , the user's cardiac output and stroke volume are both low, indicating abnormalities, while the heart rate is normal. Optionally, the output interface 900 may also display an assessment result 914, which may be text such as "Your cardiac ejection function is weak. We recommend paying more attention and consulting a professional doctor if necessary." Furthermore, the output interface 910 may also optionally display a data sharing control 915. This data sharing control 915 may be used to trigger the electronic device 100 to send the cardiac function indicator and the results of the cardiac function indicator to another electronic device (e.g., an electronic device selected by the user in the address book of the electronic device 100, or an electronic device preset by the user).

[0382] As another example, if the electronic device 100 is a mobile phone 30 and the user is in motion while the electronic device 100 is performing cardiac function monitoring, the electronic device 100 may also display the output interface 920 shown in FIG. 9C after determining the cardiac function index.

[0383] As shown in Figure 9C, the output interface 920 may include a cardiac function index schematic diagram 921 and an evaluation result 922. Among them, the cardiac function index schematic diagram 921 can be used to characterize the relationship between the user's stroke volume (or cardiac output) and exercise heart rate. The evaluation result 922 can be used to indicate whether the user's cardiac function is normal. Optionally, the evaluation result 922 can also be used to indicate the exercise intensity and exercise time supported by the user's heart. For example, the evaluation result 922 can be the text "You easily completed 40 minutes of high-intensity exercise, your heart function is normal, and it is recommended to continue to maintain the exercise habit."

[0384] In other embodiments, if the electronic device 100 is a mobile phone 30, and the user is in motion while the electronic device 100 is performing cardiac function monitoring, the electronic device 100 may first display the output interface 900 shown in Figure 9A above. Afterwards, the electronic device 100 may receive and respond to the user's swipe-up operation on the output interface 900, and display the content of the output interface 920 shown in Figure 9C in the output interface 900.

[0385] It can be understood that the embodiments shown in Figures 9A to 9C above are just three examples. In the embodiments of the present application, the output interface of the electronic device 100 for outputting cardiac function indicators may also include more, less or different content than in the above embodiments, and the present application does not limit this.

[0386] In some application scenarios, the electronic device 100 (or electronic device 200) for outputting cardiac function indicators may be a wearable device such as a watch or a bracelet.

[0387] For example, if the electronic device 100 is a watch 20 , after determining the cardiac function index, the electronic device 100 may display an output interface 1010 as shown in FIG10A .

[0388] As shown in Figure 10A, output interface 1010 may include multiple cardiac function indicators, such as stroke volume of 75 ml, cardiac output of 4.5 L / min, and heart rate of 60 beats / min. Optionally, electronic device 100 may also display the determination results of the cardiac function indicators near the cardiac function indicators, such as determination results 1011, 1012, and 1013. Each of these determination results can be used to indicate whether the corresponding cardiac function indicator is normal. The determination results can be represented by a horizontal line, an upward arrow, or a downward arrow. A horizontal line indicates that the cardiac function indicator is normal; an upward arrow indicates that the cardiac function indicator is elevated; and a downward arrow indicates that the cardiac function indicator is low. In the embodiment shown in Figure 10A, the determination results for the user's cardiac output, stroke volume, and heart rate are all horizontal lines, indicating that the determination results for all three cardiac function indicators are normal.

[0389] In some embodiments, if the user is exercising while the electronic device 100 is performing cardiac function monitoring, the electronic device 100 may also receive and respond to the user's upward swipe operation on the output interface 1010 shown in FIG10A by displaying a cardiac function index schematic diagram 1014 as shown in FIG10B on the output interface 1010. In other embodiments, if the user is exercising while the electronic device 100 is performing cardiac function monitoring, the electronic device 100 may also directly display the output interface 1010 as shown in FIG10B after determining the cardiac function index.

[0390] As shown in FIG10B , a cardiac function index diagram 1014 can be used to represent the relationship between the user's stroke volume (or cardiac output) and exercise heart rate. Optionally, a data sharing control 1015 can also be displayed in the output interface 1010. The data sharing control 1015 can be used to trigger the electronic device 100 to send the cardiac function index and the determination result of the cardiac function index to another electronic device (e.g., an electronic device selected by the user in the address book of the electronic device 100, or an electronic device preset by the user).

[0391] As another example, FIG10C shows an output interface 1020 provided in an embodiment of the present application when a determination result is abnormal.

[0392] As shown in FIG10C , output interface 1020 may include multiple cardiac function indicators, such as a stroke volume of 50 ml, a cardiac output of 3.0 L / min, and a heart rate of 60 beats / min. The electronic device 100 may also display the determination results of the cardiac function indicators near the cardiac function indicators, such as determination results 1021, 1022, and 1023. The functional and formal descriptions of the determination results can refer to the relevant descriptions in the embodiment shown in FIG10A above. In the embodiment shown in FIG10B , the user's cardiac output determination result 1021 and the stroke volume determination result 1022 are both downward arrows, indicating that the user's cardiac output and stroke volume are low. Furthermore, the heart rate determination result is a horizontal line, indicating that the user's heart rate is normal. It is understandable that in other embodiments, the electronic device 100 may also use symbols different from the above-mentioned arrows, or use labels of different colors to output the judgment results of each cardiac function indicator. For example, a red label prompts the user that the cardiac function index is high, a yellow label prompts the user that the cardiac function index is low, a green label prompts the user that the cardiac function index is normal, etc. This application does not limit the output form of the judgment results.

[0393] It can be understood that the embodiments shown in Figures 10A to 10C above are just some examples. In the embodiments of the present application, the output interface of the electronic device 100 for outputting cardiac function indicators may also include more, less or different content than in the above embodiments, and the present application does not limit this.

[0394] In some application scenarios, if the electronic device 100 used to output cardiac function indicators is headphones 10, before outputting the cardiac function indicators, the electronic device 100 can determine the output method of the cardiac function indicators based on factors such as whether the user is wearing it, whether the electronic device 100 is connected to the electronic device 200, etc.

[0395] The following describes a process for determining an output method of a cardiac function indicator when the electronic device 100 is a headset 10, provided in an embodiment of the present application.

[0396] As shown in FIG11 , when the electronic device 100 is a headset 10, the specific process of the headset 10 determining the output mode of the cardiac function indicator may include the following steps:

[0397] S1101: The earphone 10 determines whether the earphone 10 is worn by the user.

[0398] The earphone 10 can respectively determine whether the left earphone 11 and the right earphone 12 are worn by the user.

[0399] In some embodiments, headphone wearing detection can be achieved by connecting a pull-up resistor to the pin of the headphone 10. For example, when the left headphone 11 is inserted, the front end of the left headphone 11 (i.e., the contact of the left channel) will connect the detection pin to the left channel. At this time, because the left channel is connected to the ground and the resistance is very small, it is equivalent to the detection pin being grounded, so the detection pin changes from a high level to a low level. After the detection pin detects that the high level changes to a low level, an interrupt signal can be sent to the processor of the headphone 10 (such as a CPU). The processor can determine whether the left headphone 11 is worn based on whether the interrupt signal is received. It can be understood that the right headphone 12 can also be determined in a similar manner to determine whether it is worn by the user.

[0400] In other embodiments, earphone wearing monitoring can also be achieved through devices such as gyroscope sensors and acceleration sensors in the earphone 10.

[0401] It is understandable that the wearing detection methods here are just two examples. In the embodiment of the present application, the headset 10 can also use other methods to determine whether it is worn by the user, and the present application does not limit this.

[0402] If it is detected that the left earphone 11 and / or the right earphone 12 is worn by the user, the earphone 10 may execute the following step S1102 .

[0403] If it is detected that neither the left earphone 11 nor the right earphone 12 is worn by the user, the earphone 10 may execute the following step S1103 or the following step S1105.

[0404] S1102 , the earphone 10 plays the cardiac function index at volume 1 .

[0405] In some embodiments, if the earphone 10 has played audio before cardiac function monitoring, the volume 1 may be the volume at which the earphone 10 previously played the audio.

[0406] Cardiac function indicators may include cardiac output and stroke volume, and optionally, may also include indicators such as heart rate.

[0407] In some embodiments, the earphone 10 may also play the determination result while playing the cardiac function index. The specific content of the determination result can refer to the relevant description in step S707 shown in FIG. 7 above, which will not be repeated here.

[0408] S1103 , the earphone 10 determines whether a communication connection has been established between the earphone 10 and the electronic device 200 .

[0409] When the user is not wearing the headset 10, the headset 10 can further determine whether a communication connection is established with another electronic device (herein referred to as the electronic device 200). The communication connection can be a wired communication connection or a wireless communication connection.

[0410] If the earphone 10 establishes a communication connection with the electronic device 200 , the earphone 10 may execute the following step S1104 .

[0411] If the headset 10 has not established a communication connection with any electronic device, the headset 10 may execute the following step S1105.

[0412] S1104 , the earphone 10 sends an output instruction 1 to the electronic device 200 , where the output instruction 1 includes a cardiac function indicator.

[0413] S1105 , the earphone 10 plays the cardiac function index at volume 2 , which is greater than volume 1 .

[0414] When the user is not wearing the earphone 10, the earphone 10 can play the cardiac function index at volume 2. Volume 2 is greater than volume 1.

[0415] In this way, when the user is not wearing the earphone 10, the earphone 10 can increase the volume of the cardiac function index so that the user can hear the playback content.

[0416] It can be understood that the embodiment shown in Figure 11 is only an exemplary description. Factors such as whether the earphone 10 is worn and whether the earphone 10 has established a communication connection with other electronic devices will affect the way in which the earphone 10 outputs the cardiac function index. In an embodiment of the present application, the earphone 10 can also use a different method from the embodiment shown in Figure 11 to determine the way in which the earphone 10 outputs the cardiac function index, such as receiving and responding to the user's operation on a designated button on the earphone 10, playing the cardiac function index, etc. This application does not limit this.

[0417] In some embodiments, such as the application scenario shown in FIG6F , the headset 10 and the mobile phone 30 can collaboratively monitor the user's cardiac function. A multi-device collaborative monitoring method provided by an embodiment of the present application is described below.

[0418] FIG12A shows a schematic flow chart of another monitoring method provided in an embodiment of the present application.

[0419] For example, as shown in FIG12A , the specific process of the monitoring method may include the following steps:

[0420] S1201, the earphone 10 starts cardiac function monitoring.

[0421] The specific content of step S1201 can refer to the relevant description of step S701 shown in Figure 7 above, and will not be repeated here.

[0422] S1202: The headset 10 sends a start notification to the mobile phone 30. The start notification is used to notify the mobile phone 30 to start monitoring heart function.

[0423] The headset 10 can send a start notification to the mobile phone 30 via a communication connection with the mobile phone 30. In some embodiments, the communication connection between the headset 10 and the mobile phone 30 can be a wired communication connection. In other embodiments, the communication connection between the headset 10 and the mobile phone 30 can also be a wireless communication connection such as a Bluetooth connection.

[0424] S1203: The earphone 10 obtains a wearing status of the earphone 10 , where the wearing status indicates whether the left earphone 11 and the right earphone 12 are worn by the user.

[0425] The earphone 10 can perform wearing detection to determine whether the left earphone 11 is worn by the user, and whether the right earphone 12 is worn by the user, and determine the wearing status of the earphone 10 based on the results of the wearing detection.

[0426] S1204: The earphone 10 determines a working electrode based on the wearing condition of the earphone 10. The working electrode is an electrode used in the monitoring process.

[0427] When it is determined that the user is wearing the left earphone 11 and not wearing the right earphone 12 , the earphone 10 may determine the electrodes (eg, electrode 1 and electrode 3 ) on the left earphone 11 as working electrodes.

[0428] When it is determined that the user is not wearing the left earphone 11 and is wearing the right earphone 12 , the earphone 10 may determine the electrodes (eg, electrode 2 and electrode 4 ) on the right earphone 12 as working electrodes.

[0429] When it is determined that the user is wearing the left earphone 11 and the right earphone 12, the earphone 10 may determine the electrode on the left earphone 11 as the working electrode, or determine the electrode on the right earphone 12 as the working electrode.

[0430] S1205 , the headset 10 outputs prompt 3 based on the working electrode of the headset 10 , where prompt 3 is used to remind the user of the hand and holding posture of holding the mobile phone 30 .

[0431] When it is determined that the electrode on the left earphone 11 is the working electrode, prompt 3 may prompt the user to hold the mobile phone 30 with the right hand, and the right hand contacts at least one electrode on the mobile phone 30 when holding it.

[0432] When it is determined that the electrode on the right earphone 12 is the working electrode, prompt 3 may prompt the user to hold the mobile phone 30 with the left hand, and the left hand contacts at least one electrode on the mobile phone 30 when holding it.

[0433] In this way, it can be ensured that the contact points between the working electrode of the headset 10 and the user's skin and the contact points between the working electrode of the mobile phone 30 and the user's skin are respectively located at the two ends of the chest tissue, and the resistance between the working electrodes of the two devices is determined to be the user's body resistance.

[0434] S1206 , the mobile phone 30 determines the working electrodes in the mobile phone 30 based on the user's holding posture of the mobile phone 30 .

[0435] After receiving the start notification sent by the headset 10 , the mobile phone 30 can determine the posture of the user holding the mobile phone 30 and determine the working electrodes of the mobile phone 30 .

[0436] In some embodiments, because the mobile phone 30 can determine the position of each electrode on the mobile phone 30 relative to the mobile phone 30, the mobile phone 30 can determine, based on the user's posture of holding the mobile phone 30, the electrodes that the user's skin can contact when the user is holding the mobile phone 30. It should be noted that in some embodiments, the mobile phone 30 can obtain the user's posture of holding the mobile phone 30 using sensors such as a gyroscope. In other embodiments, the mobile phone 30 can also determine the user's posture of holding the mobile phone 30 based on other methods, and this application does not limit this.

[0437] For example, if the mobile phone 30 is the mobile phone 30 shown in Figure 4B, and the user's holding posture is to hold the left and right sides of the mobile phone 30 with one hand, the mobile phone 30 can determine that the user can touch all the electrodes on the mobile phone 30, so the mobile phone 30 can select any one (or two) of the electrodes as the working electrode of the mobile phone 30.

[0438] S1207: The earphone 10 determines whether the working electrode of the earphone 10 is in good contact with the skin.

[0439] Steps S1207 to S1210 are all optional steps. In some embodiments, if the headset 10 has more than one working electrode, the headset 10 may execute steps S1207 to S1208; if the mobile phone 30 has more than one working electrode, the mobile phone 30 may execute steps S1209 to S1210. Furthermore, steps S1207 and S1209 may be executed simultaneously, or only one of them may be executed, or they may be executed in a sequential order. The present embodiment of the application does not limit the order in which steps S1207 and S1209 are executed.

[0440] If the earphone 10 includes at least two working electrodes and the mobile phone 30 also includes at least two working electrodes, the two working electrodes of the earphone 10 and the two working electrodes of the mobile phone 30 can form a new monitoring circuit, and the circuit components in the monitoring circuit can be set in the earphone 10 and / or the mobile phone 30. In some embodiments, the connection method of each circuit component in the monitoring circuit can refer to the relevant description in the embodiment shown in Figure 5E above, wherein the two working electrodes of the earphone 10 can correspond to electrodes 1 and 3 shown in Figure 5E, and the two working electrodes of the mobile phone 30 can correspond to electrodes 2 and 4 shown in Figure 5E. In other embodiments, the monitoring circuit composed of the working electrodes in the earphone 10 and the mobile phone 30 can also be a monitoring circuit different from the above-mentioned embodiment, and this application is not limited thereto.

[0441] The manner in which the earphone 10 determines whether the working electrode of the earphone 10 is in good contact with the skin can be referred to the relevant description in step S703 shown in FIG7 above, which will not be repeated here.

[0442] When the earphone 10 determines that the working electrode of the earphone 10 is in good contact with the skin, the earphone 10 may execute the following step S1211. Optionally, the earphone 10 may also send a contact notification to the mobile phone 30 to notify the mobile phone 30 that the working electrode of the earphone 10 is in good contact.

[0443] When the earphone 10 determines that the working electrode of the earphone 10 is in poor contact with the skin, the earphone 10 may execute the following step S1208.

[0444] S1208: The earphone 10 outputs prompt 4, which is used to remind the user that the working electrode of the earphone 10 is in poor contact with the skin.

[0445] In some embodiments, the headset 10 may output prompt 4 using one or more methods, such as voice playback, flashing indicator lights, and vibration. In other embodiments, if the headset 10 includes a display screen, the headset 10 may also output prompt 4 using the display screen. In other embodiments, the headset 10 may also send a reminder instruction 11 to the mobile phone 30, instructing the mobile phone 30 to output prompt 4, notifying the user that the working electrode of the headset 10 is not in contact with the user's skin.

[0446] S1209, the mobile phone 30 determines whether the working electrode of the mobile phone 30 is in good contact with the skin.

[0447] The manner in which the mobile phone 30 determines whether the working electrode of the mobile phone 30 is in good contact with the skin can be referred to the relevant description in step S703 shown in FIG. 7 , which will not be repeated here.

[0448] When the mobile phone 30 determines that the working electrode of the mobile phone 30 is in good contact with the skin, the mobile phone 30 may execute the following step S1211. Optionally, the mobile phone 30 may also send a contact notification to the headset 10 to notify the headset 10 that the working electrode of the mobile phone 30 is in good contact.

[0449] When the mobile phone 30 determines that the working electrode of the mobile phone 30 is not in good contact with the skin, the mobile phone 30 may execute the following step S1209 .

[0450] S1210, the mobile phone 30 outputs prompt 5, which is used to prompt the user that the working electrode of the mobile phone 30 is in poor contact with the skin.

[0451] In some embodiments, the mobile phone 30 may output the prompt 5 by displaying on a screen, playing voice, flashing an indicator light, vibrating, or in one or more other ways. In other embodiments, the mobile phone 30 may also send a reminder instruction 2 to the headset 10, which is used to instruct the headset 10 to output the prompt 5, notifying the user that the working electrode of the mobile phone 30 is not in good contact with the user's skin.

[0452] S1211: The earphone 10 and the mobile phone 30 determine a cardiac impedance curve through the working electrodes. The cardiac impedance curve is used to represent the relationship between the user's cardiac impedance and time.

[0453] In some embodiments, if the earphone 10 and the mobile phone 30 have executed the above steps S1207 to S1210, the earphone 10 and the mobile phone 30 will then execute step S1211 after determining that the working electrodes are in good contact.

[0454] S1212: The earphone 10 determines a cardiac function index based on the cardiac impedance curve.

[0455] S1213, the earphone 10 outputs the cardiac function index.

[0456] The specific contents of steps S1211 to S1213 may refer to the relevant descriptions of steps S705 to S707 shown in FIG7 , which will not be repeated here.

[0457] By using the monitoring method provided in the embodiment of the present application, the user's cardiac function can be monitored through the earphones 10 and the mobile phone 30 (or other multiple electronic devices).

[0458] It should be noted that the embodiment shown in Figure 12A is only an exemplary illustration of how the user's cardiac function can be monitored through the collaboration of multiple devices. In the embodiment of the present application, the electronic device that executes the monitoring method shown in the above Figure 12A can also be other electronic devices different from the headset 10 and mobile phone 30, such as the headset 10 and tablet computer, the headset 10 and watch, etc., and this application does not limit this.

[0459] In other embodiments, step S1201 shown in Figure 12A, and any one or more steps in steps S1212 to S1213 can also be executed by the mobile phone 30. The embodiment of the present application does not limit the execution entity of step S1201, and steps S1212 to S1213.

[0460] In some application scenarios, when the mobile phone 30 and the headset 10 cooperate to perform cardiac function monitoring, the mobile phone 30 can also output prompts to remind the user how to hold the phone, or remind the user whether the electrodes are in good contact with the skin.

[0461] For example, when the left earphone is worn, the mobile phone 30 may display a guidance interface 1200 as shown in FIG12B based on the wearing detection result sent by the earphone 10 .

[0462] As shown in FIG12B , the guidance interface 1200 includes an operation guide, which may include an animation 1201 and text 1202. The operation guide may be used to guide the user on how to hold the phone and / or wear the earphones. For example, if the left earphone is worn, the animation 1201 may be a dynamic image of the right hand holding the phone, and the text 1202 may include "Detected that the left earphone is worn, it is recommended to hold the phone with the right hand."

[0463] As another example, when it is detected that the left earphone 11 is not in good contact with the user's skin, the mobile phone 30 may display a prompt interface 1210 as shown in FIG12C .

[0464] As shown in FIG12C , prompt interface 1210 may include a poor contact prompt, which may include animation 1211 and text 1212. The poor contact prompt may be used to inform the user that there is currently poor contact between the electrodes and the user's skin. For example, if the left earphone is in poor contact with the skin, animation 1211 may be a dynamic image of the user wearing the left earphone, and text 1212 may include "Poor contact between the left earphone and the skin detected. Please adjust the wearing method."

[0465] As another example, when it is detected that the electrodes on the mobile phone 30 are not in good contact with the skin, the mobile phone 30 may display a prompt interface 1220 as shown in FIG12D .

[0466] As shown in FIG12D , prompt interface 1220 may include a poor contact prompt, which may include animation 1221 and text 1222. The poor contact prompt may be used to inform the user that there is currently poor contact between the electrode and the user's skin. For example, if the phone's electrode is in poor contact with the skin, animation 1221 may be a dynamic image of the user's finger touching the electrode, and text 1222 may include "Poor contact between the phone's electrode and skin detected. Please touch the fingerprint key."

[0467] It is understandable that Figures 12B to 12D are just some examples. In the embodiments of the present application, the mobile phone 30 can also output more, fewer or different prompts than the above embodiments, and the present application does not limit this.

[0468] The following introduces the functional modules of an electronic device 100 provided in an embodiment of the present application.

[0469] FIG13 shows a schematic diagram of functional modules of an electronic device 100 provided in an embodiment of the present application.

[0470] As shown in Figure 13, the electronic device 100 may include an interaction module 1301, a data monitoring module 1302, a data processing module 1303 and an output module 1304. Optionally, the electronic device 100 may also include any one or more of the following: a contact detection module 1305 and a status detection module 1306.

[0471] Among them, the interaction module 1301 can receive user operations, such as the user's operation of turning on cardiac function monitoring, the user's operation of viewing cardiac function indicators, etc. In some embodiments, the interaction module 1301 can receive and respond to the user's operation of turning on cardiac function monitoring, and send a start instruction to the data monitoring module 1302, and the start instruction is used to instruct the data monitoring module 1302 to start monitoring the current flowing through the user's body and the voltage across the user's chest tissue. In other embodiments, the interaction module 1301 can receive and respond to the user's operation of turning on cardiac function monitoring, and send a contact detection instruction to the contact detection module 1305, and the contact detection instruction is used to instruct the contact detection module 1305 to determine the contact between the electrodes in the monitoring circuit and the skin. In some embodiments, the interaction module 1301 can also receive and respond to the user's operation of turning on cardiac function monitoring, and send a detection instruction to the state detection module 1306, and the detection instruction is used to instruct the state detection module 1306 to determine the user's current state. In other embodiments, the interaction module 1301 may also receive and respond to the user's operation of setting the current state (such as resting state, sleeping state, motion state, etc.), determine the user state, and send the user state to the data processing module 1303.

[0472] The data monitoring module 1302 can receive and respond to the start instruction to start monitoring the current flowing through the user's body and the voltage across the user's chest tissue. It should be noted that the start instruction can be sent by the interaction module 1301 or the electronic device 200. In some embodiments, the data monitoring module 1302 can also determine the user's cardiac impedance curve based on the current flowing through the user's body and the voltage across the user's chest tissue. After determining the cardiac impedance curve, the data monitoring module 1302 can send the cardiac impedance curve to the data processing module 1303. It should be noted that the start instruction received by the data monitoring module 1302 can be sent by the interaction module 1301 or the contact detection module 1305.

[0473] The data processing module 1303 can determine multiple cardiac function indicators of the user based on the cardiac impedance curve. These indicators may include cardiac output and stroke volume, and optionally, the user's heart rate. The data processing module 1303 can also send the cardiac function indicators to the output module 1304. In some embodiments, the data processing module 1303 can store value ranges for multiple cardiac function indicators. The data processing module 1303 can also determine a determination result based on the actual value of the cardiac function indicator and a preset value range. The determination result can be used to indicate whether a single cardiac function indicator is normal and / or whether the user's cardiac function is normal. Optionally, the data processing module 1303 can also store value ranges for multiple cardiac function indicators under different states. In this case, the data processing module 1303 can determine the determination result based on the user state sent by the state detection module 1306, the actual value of the cardiac function indicator, and the preset value range for the current user state. After determining the determination result, the data processing module 1303 can also send the determination result to the output module 1304.

[0474] Output module 1304 can output the cardiac function indicator sent by data processing module 1303. Optionally, it can also output the determination result sent by the data processing module. In some embodiments, output module 1304 can also receive and, in response to the contact detection result sent by contact detection module 1305, output prompt 2, which is used to inform the user that the electrode is not in contact with the skin. In some embodiments, output module 1304 can also determine the output method or output volume. In some embodiments, output module 1304 outputs the cardiac function indicator by sending output instruction 1 to electronic device 200, where output instruction 1 includes the cardiac function indicator and is used to instruct electronic device 200 to output the cardiac function indicator.

[0475] The contact detection module 1305 can receive and respond to the contact detection instruction sent by the interaction module 1301 to determine whether the electrodes in the monitoring circuit are in good contact with the skin. When it is determined that all electrodes are in good contact with the skin, the contact detection module 1305 can send a start instruction to the data monitoring module 1302, and the start instruction is used to instruct the data monitoring module 1302 to start monitoring the current flowing through the user's body and the voltage across the user's chest tissue. When it is determined that there is poor contact between the electrode and the skin, the contact detection module 1305 can send a contact detection result to the output module 1304, and the contact detection result is used to indicate that there are electrodes in the monitoring circuit that are in poor contact with the skin, or, to indicate that there are electrodes in the monitoring circuit that are in poor contact with the skin.

[0476] The state detection module 1306 can determine the user's current state. The user's state can include resting state, moving state, and optionally, sleeping state. In some embodiments, the state detection module 1306 can monitor the user's state in real time. In other embodiments, the state detection module 1306 can also receive and respond to detection instructions sent by the interaction module 1301 to determine the current user's state. After determining the user's state, the state detection module 1306 can send the user's state to the data processing module 1303.

[0477] It can be understood that the embodiment shown in Figure 13 is only an example. In the embodiments of the present application, the electronic device 100 may also include more, fewer or different functional modules than the embodiment shown in Figure 13 above. In addition, multiple functional modules in the above embodiments may also be combined into one functional module, or a functional module in the above embodiments may also be split into multiple functional modules. This application does not limit this.

[0478] The following introduces the functional modules of a health monitoring system 1000 provided in an embodiment of the present application.

[0479] FIG14 shows a schematic diagram of functional modules of a health monitoring system 1000 provided in an embodiment of the present application.

[0480] As shown in Figure 14, the health monitoring system 1000 may include an electronic device 100 and an electronic device 200. The electronic device 100 may include a data monitoring module 1302 and a communication module 1307, and the electronic device 200 may include a communication module 1401, an interaction module 1402, a data processing module 1403, and an output module 1404.

[0481] The data monitoring module 1302 may receive and respond to the activation instruction sent by the communication module 1307 to begin monitoring the current flowing through the user's body and the voltage across the user's chest tissue. In some embodiments, the data monitoring module 1302 may also determine the user's cardiac impedance curve based on the current flowing through the user's body and the voltage across the user's chest tissue. After determining the cardiac impedance curve, the data monitoring module 1302 may send the cardiac impedance curve to the communication module 1307.

[0482] The communication module 1307 can receive a start instruction sent by the communication module 1401 in the electronic device 200 and send the start instruction to the data monitoring module 1302. The communication module 1307 can also receive a cardiac impedance curve sent by the data monitoring module 1302 and send the cardiac impedance curve to the communication module 1401.

[0483] The communication module 1401 can receive the start instruction sent by the interaction module 1402 and send the start instruction to the communication module 1307. The communication module 1401 can also receive the cardiac impedance curve sent by the communication module 1307 and send the cardiac impedance curve to the data processing module 1403.

[0484] The interaction module 1402 may receive and respond to the user's operation of starting cardiac function monitoring by sending a start instruction to the communication module 1401 .

[0485] Data processing module 1403 can determine multiple cardiac function indicators, such as cardiac output and stroke volume, based on the cardiac impedance curve transmitted by communication module 1401. Data processing module 1403 can transmit the cardiac function indicators to output module 1404. Optionally, data processing module 1403 can also determine a determination result. The specific content of the determination result can be found in the description of the above embodiment and will not be repeated here. Data processing module 1403 can also transmit the determination result to output module 1404.

[0486] The output module 1404 can output the cardiac function index sent by the data processing module 1403 , and optionally, can also output the determination result sent by the data processing module 1403 .

[0487] It is understandable that the embodiment shown in FIG14 is only an example. In the embodiment of the present application, the health monitoring system 1000 may also include more, fewer, or different functional modules than the embodiment shown in FIG14. Some functional modules in the electronic device 200 (for example, any one or more of the modules such as the interaction module, the data processing module, and the output module) may also be provided in the electronic device 100. Some functional modules may constitute one functional module, and one functional module may also be split into multiple functional modules. This application does not limit this. For the specific functional description of the contact detection module and the state detection module, reference may be made to the relevant description in the embodiment shown in FIG13 above.

[0488] In other embodiments, the electronic device 100 may further include any one or more of the following: an interaction module 1301, a data processing module 1303, an output module 1304, a contact detection module 1305, and a state detection module 1306, and the specific functions of the above-mentioned modules can refer to the relevant description in the embodiment shown in Figure 13 above. In addition, it should be noted that the interaction module, the data processing module, and the output module can be simultaneously set in the same electronic device (such as the electronic device 100 or the electronic device 200), or can be set in the electronic device 100 and the electronic device 200 separately. The same functional modules can also be set in the electronic device 100 and the electronic device 200, for example, the output module 1304 is set in the electronic device 100, and the output module 1404 is set in the electronic device 200, etc. This application does not limit this.

[0489] For the convenience of subsequent description, the above-mentioned electronic device 100 and electronic device 200 can be collectively referred to as devices. It should be understood that the division of the various units in the device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. In addition, the units in the device can be implemented in the form of a processor calling software; for example, the device includes a processor, the processor is connected to a memory, the memory stores instructions, and the processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units of the device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units can be realized by designing the hardware circuits. The hardware circuit can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units by designing the logical relationship of the components in the circuit. For another example, in another implementation, the hardware circuit can be implemented by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units. All units of the above devices can be implemented in the form of software called by the processor, or in the form of hardware circuits, or in part by software called by the processor, and the rest by hardware circuits.

[0490] In an embodiment of the present application, a processor is a circuit with data processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a CPU, a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor can implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by an ASIC or PLD, such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0491] It can be seen that each unit in the above device can be one or more processors (or processing circuits) configured to implement the above method, such as: CPU, GPU, NPU, TPU, DPU, microprocessor, DSP, ASIC, FPGA, or a combination of at least two of these processor forms.

[0492] In addition, the various units in the above devices can be fully or partially integrated together, or can be implemented independently. In one implementation, these units are integrated together and implemented in the form of a system-on-a-chip (SOC). The SOC may include at least one processor for implementing any of the above methods or implementing the functions of the various units of the device. The type of the at least one processor can be different, for example, including a CPU and FPGA, a CPU and an artificial intelligence processor, a CPU and a GPU, etc.

[0493] A possible physical structure of the electronic device 100 provided in an embodiment of the present application is introduced below.

[0494] For example, FIG15 shows a schematic diagram of the physical structure of an electronic device 100 provided in an embodiment of the present application.

[0495] As shown in Figure 15, electronic device 100 may be the electronic device 100 in the above embodiment. Electronic device 100 may include: a processor 1501 and a memory 1502. Optionally, electronic device 100 may also include a transmitter 1503 and a receiver 1504. The processor 1501, memory 1502, transmitter 1503, and receiver 1504 may be interconnected or connected to each other via a bus 1505.

[0496] Exemplarily, the memory 1502 is used to store computer programs and data of the electronic device 100. The memory 1502 may include, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or portable read-only memory (CD-ROM).

[0497] The software or program codes required for all or part of the functions of the electronic device 100 in the above method embodiment are stored in the memory 1502 .

[0498] In one possible implementation, if the software or program code required for some functions is stored in the memory 1502, the processor 1501, in addition to calling the program code in the memory 1502 to implement some functions, can also cooperate with other components (such as the transmitter 1503 and the receiver 1504, etc.) to jointly complete other functions described in the method embodiment (such as the function of receiving or sending data).

[0499] The transmitter 1503 and the receiver 1504 are used to support the electronic device 100 to communicate, such as receiving or sending data or signals.

[0500] In some embodiments, the transmitter 1503 can send the cardiac impedance curve monitored by the electronic device 100 to the electronic device 200. In other embodiments, the transmitter 1503 can also send the current curve and voltage curve collected by the electronic device 100 to the electronic device 200.

[0501] In some embodiments, the transmitter 1503 may also send an output instruction 1 to the electronic device 200. The output instruction 1 may include a cardiac function index and is used to instruct the electronic device 200 to output the cardiac function index. Optionally, the output instruction 1 may also include a determination result.

[0502] In some embodiments, the receiver 1504 may receive a start instruction sent by the electronic device 200 to the electronic device 100 , and the start instruction may be used to trigger the electronic device 100 to start cardiac function monitoring.

[0503] In some embodiments, the receiver 1504 may receive user information sent by the electronic device 200 to the electronic device 100 .

[0504] In some embodiments, the receiver 1504 may receive the cardiac function indicator and / or determination result sent by the electronic device 200 to the electronic device 100 .

[0505] For example, the processor 1501 may be the CPU, GPU, NPU, TPU, DPU, microprocessor, DSP, ASIC, FPGA, or a combination of at least two of these processor types, as described above. The processor 1501 may be configured to read the program stored in the memory 1502 and execute the operations performed by the electronic device 100 in any of the above embodiments.

[0506] The specific operations and beneficial effects of each unit in the electronic device 100 shown in FIG15 can be found in the corresponding description in the above method embodiment, which will not be repeated here.

[0507] It can be understood that the embodiment shown in Figure 15 is only an example. In the embodiment of the present application, the electronic device 100 may also include more, fewer or different devices than the embodiment shown in Figure 15 above, and the present application does not limit this.

[0508] The following introduces a chip system provided by an embodiment of the present application.

[0509] The present application also provides a chip system, which includes at least one processor for implementing the functions involved in the electronic device 100 in any of the above embodiments.

[0510] In one possible design, the chip system further includes a memory, which is used to store program instructions and data, and the memory is located inside or outside the processor.

[0511] The chip system can be composed of chips, or can include chips and other discrete devices.

[0512] Optionally, there may be one or more processors in the chip system. The processor may be implemented in hardware or software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, etc. When implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

[0513] Optionally, the memory in the chip system may be one or more. The memory may be integrated with the processor or may be provided separately from the processor, which is not limited in the embodiments of the present application. For example, the memory may be a non-transient processor, such as a read-only memory (ROM), which may be integrated with the processor on the same chip or provided on different chips. The embodiments of the present application do not specifically limit the type of memory or the configuration of the memory and the processor.

[0514] Exemplarily, the chip system may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD) or other integrated chips.

[0515] It can be understood that the above chip system is only an example. In the embodiments of the present application, the chip system may also include more, fewer or different devices than the above embodiments, and the present application does not limit this.

[0516] The following describes a specific process of a monitoring method provided in an embodiment of the present application.

[0517] As shown in FIG16 , the specific process of the first electronic device executing the monitoring method may include the following steps:

[0518] S1601: A first electronic device receives a first instruction, where the first instruction is used to instruct the first electronic device to start cardiac function monitoring.

[0519] The first electronic device may be the electronic device 100 in the above embodiment, such as the earphone 10, the watch 20, the mobile phone 30, etc.

[0520] The first electronic device is provided with a first circuit, which includes a first electrode, a second electrode, a third electrode, a fourth electrode, an excitation current generating unit, and a voltage measuring unit. In an embodiment of the present application, the first circuit can be the monitoring circuit in the above-mentioned embodiment, such as the monitoring circuit in the embodiment shown in FIG5D. The first electrode can be electrode 1, the second electrode can be electrode 2, the third electrode can be electrode 3, and the fourth electrode can be electrode 4.

[0521] In one possible implementation, receiving the first instruction specifically includes: receiving the first instruction sent by the second electronic device; or receiving a first operation of the user on the first electronic device to generate the first instruction. The second electronic device may be the electronic device 200 in the above embodiment.

[0522] In another possible implementation, receiving the first instruction specifically includes: detecting that a monitoring condition is satisfied, and generating the first instruction. Specific contents of the monitoring condition can be found in the description of step S701 shown in FIG. 7 , and will not be repeated here.

[0523] S1602: The first electronic device responds to the first instruction and determines through the first circuit that the first electrode is in good contact with the skin. The first circuit includes the first electrode, an excitation current generating unit, and a third electrode.

[0524] After receiving the first instruction, the first electronic device may execute step S1602 and step S1603. It should be noted that the first electronic device may execute step S1602 first and then step S1603; the first electronic device may also execute step S1603 first and then step S1602.

[0525] In addition, during the process of the first electronic device executing steps S1602 to S1604, the first electrode contacts the first position of the user's skin, the second electrode contacts the second position of the user's skin, and the first position and the second position are respectively located at the two ends of the chest tissue. Moreover, the third electrode contacts the third position of the user's skin, the fourth electrode contacts the fourth position of the user's skin, the distance between the third position and the first position is a fixed value (i.e., equal to the distance between the first electrode and the third electrode), and the distance between the fourth position and the second position is a fixed value (i.e., equal to the distance between the second electrode and the fourth electrode). The third position and the first position are located on the same side of the chest tissue, and the fourth position and the second position are located on the same side of the chest tissue. In an embodiment of the present application, the first position may also be contact point 1 in the above embodiment, the second position may also be contact point 2 in the above embodiment, the third position may also be contact point 3 in the above embodiment, and the fourth position may also be contact point 4 in the above embodiment.

[0526] The first loop may be loop 1 as shown in FIG. 5F above.

[0527] The specific manner in which the first electronic device determines that the first electrode is in good contact with the skin can be referred to the relevant description in step S703 shown in FIG7 , which will not be repeated here.

[0528] S1603: The first electronic device determines that the second electrode is in good contact with the skin through a second circuit, where the second circuit includes the second electrode, an excitation current generating unit, and a fourth electrode.

[0529] The second loop may be loop 2 as shown in FIG. 5G above.

[0530] The specific manner in which the first electronic device determines that the second electrode is in good contact with the skin can be referred to the relevant description in step S703 shown in FIG7 , which will not be repeated here.

[0531] S1604: The first electronic device determines first information through a third circuit, where the third circuit includes a first electrode, an excitation current generating unit, a voltage measuring unit, and a second electrode. The first electrode contacts a first location on the user's skin, and the second electrode contacts a second location on the user's skin, where the first location and the second location are located at opposite ends of chest tissue, respectively.

[0532] In some embodiments, the third loop may include loop 3 and loop 4 shown in FIG. 5H above.

[0533] In other embodiments, when the first electrode and the second electrode are in good contact with the user's skin, the first electrode, the excitation current generating unit and the second electrode can form a loop, the first electrode, the voltage measuring unit and the second electrode can form another loop, and the third loop can include the above two loops.

[0534] S1605, the first electronic device outputs first information, the first information includes one or more of the following: cardiac output, stroke volume, heart rate, ejection fraction, comprehensive result, first result, second result, third result and fourth result, the comprehensive result is used to indicate whether the user's heart function is normal, the first result is used to indicate whether the cardiac output is normal, the second result is used to indicate whether the stroke volume is normal, the third result is used to indicate whether the heart rate is normal, and the fourth result is used to indicate whether the ejection fraction is normal.

[0535] Cardiac output, stroke volume, heart rate, ejection fraction, and the like are cardiac function indicators in step S707 shown in FIG7 . The determination methods and functional descriptions of the first, second, third, and fourth results can refer to the descriptions of the determination results of the various cardiac function indicators in step S707 shown in FIG7 . The comprehensive result can be the comprehensive determination result in step S707 shown in FIG7 .

[0536] The specific manner in which the first electronic device outputs the first information can refer to the relevant description in step S707 shown in Figure 7 above, and can also refer to the relevant description in the embodiments shown in Figures 9A-9C and 10A-10C above, and can also refer to the relevant content in the embodiment shown in Figure 11, which will not be repeated here.

[0537] In this way, the first electronic device can obtain the user's cardiac function monitoring results in real time, which helps the user to understand their health status in a timely manner. In addition, the first electronic device can also determine whether the electrodes are in good contact with the user's skin.

[0538] In a possible implementation, the method further includes: outputting a first prompt in response to the first instruction, where the first prompt is used to prompt the user to start monitoring cardiac function.

[0539] The first prompt may be prompt 1 in step S702 shown in FIG. 7 .

[0540] In this way, the first electronic device can remind the user whether cardiac function monitoring is turned on through the first prompt.

[0541] In one possible implementation, before determining the first information through the third loop, the method also includes: determining that the user state is the first state; determining the first information through the third loop, specifically including: determining a cardiac function index through the third loop, the cardiac function index including any one or more of the following: cardiac output, stroke volume, heart rate, ejection fraction; determining the first information based on the first state and the cardiac function index.

[0542] In this way, the first electronic device can obtain the user status in real time and determine whether the user's cardiac function index is normal based on the user status.

[0543] In a possible implementation, the first state is a motion state, a resting state, or a sleeping state.

[0544] In another possible implementation, the first state may also include, but is not limited to, any one or more of the following: a frightened state, an oxygen-deficient state, a diving state, a meditative state, etc.

[0545] In one possible implementation, determining that the user status is the first status specifically includes: detecting that the user status is the first status; or, receiving and responding to the user's operation of setting the status, determining that the user status is the first status; or, receiving second information sent by a second electronic device, and determining that the user status is the first status based on the second information.

[0546] The second information may be the user information in step S701 and step S707 shown in FIG. 7 .

[0547] In this way, the first electronic device can determine the user status based on the user's operation of setting the status, or can determine the user status based on information sent by other electronic devices. The first electronic device can also detect the user status through devices such as sensors.

[0548] In a possible implementation, when the first state is an exercise state, the first information further includes a first graph, and the first graph is used to indicate the relationship between stroke volume and exercise heart rate.

[0549] For example, the first graphic may be the cardiac function index schematic diagram 921 in the output interface 920 shown in FIG. 9C .

[0550] In this way, when the user is in a state of exercise, the first electronic device can output a first graphic to prompt the user of the relationship between stroke volume and exercise heart rate.

[0551] In a possible implementation, outputting the first information specifically includes: sending a second instruction to the second electronic device, where the second instruction is used to instruct the first electronic device to output the first information.

[0552] In some embodiments, the second instruction may be the output instruction 1 in step S707 shown in FIG. 7 .

[0553] In this way, the first electronic device can also output the first information through the second electronic device.

[0554] In a possible implementation, the first electronic device is a headset, and the method further includes: before receiving the first instruction, the headset plays the first audio; when receiving the first instruction, pausing the playing of the first audio.

[0555] In one possible implementation, the first electronic device is an earphone, and playing the first audio specifically includes: playing the first audio at a first volume; outputting the first information specifically includes: if the user wears the left earphone or the right earphone, playing the first information at the first volume.

[0556] In a possible implementation, the first electronic device is an earphone, and the method further includes: if the user is not wearing the left earphone and the right earphone, playing the first information at a second volume, the second volume being greater than the first volume.

[0557] The first volume may also be the volume 1 in the embodiment shown in FIG. 11 , and the second volume may be the volume 2 in the embodiment shown in FIG. 11 .

[0558] In this way, when the first electronic device is a headset, the first electronic device can determine the output volume of the first information based on whether the user is wearing the headset.

[0559] In one possible implementation, the first electronic device is an earphone, and outputting the first information specifically includes: if the user is not wearing the left earphone and the right earphone, sending a second instruction to the second electronic device, the second instruction being used to instruct the first electronic device to output the first information.

[0560] In some embodiments, the second instruction may be the output instruction 1 in step S1104 shown in FIG. 11 .

[0561] In this way, when the first electronic device is a headset, the first electronic device can determine whether to output the first information through the second electronic device based on whether the user is wearing the headset.

[0562] In one possible implementation, the first electronic device is an earphone, which includes a left earphone and a right earphone. There is a wired connection between the left earphone and the right earphone, and the left earphone is provided with a first electrode and a third electrode, and the right earphone is provided with a second electrode and a fourth electrode.

[0563] When the first electronic device is an earphone, the specific shape description and electrode distribution of the earphone can refer to the relevant description of the earphone 10 in the embodiment shown in Figures 2A to 2C above.

[0564] In one possible implementation, the first electronic device is a wearable device, comprising a movement and a strap, wherein the first electrode and the third electrode are located at one end of the strap, and the second electrode and the fourth electrode are located at the other end of the strap, and the length of the strap is greater than a first length. The first length may be the shortest length that can span across two ends (e.g., upper and lower ends or left and right ends) of chest tissue.

[0565] In one possible implementation, the first electronic device is a wearable device, which includes a movement and a strap, the movement includes a first button and a second button, the first electrode and the third electrode are located on the back of the movement, the second electrode is located on the first button, and the fourth electrode is located on the second button.

[0566] In one possible implementation, the first electronic device is a wearable device, the wearable device includes a movement and a strap, the movement includes a first button and a second button, the first electrode and the third electrode are located on the strap, the second electrode is located on the first button, and the fourth electrode is located on the second button.

[0567] When the first electronic device is a wearable device, the specific morphology and electrode distribution of the wearable device can refer to the relevant description of the watch 20 in the embodiment shown in Figures 3A to 3E above.

[0568] In one possible implementation, the first electronic device is a mobile phone, which includes one or more buttons, and one or more of the first electrode, the second electrode, the third electrode, and the fourth electrode are set on the one or more buttons, and the first electrode, the second electrode, the third electrode, and the fourth electrode do not contact each other.

[0569] In one possible implementation, one or more buttons of the mobile phone include a volume button and a fingerprint button, and one or more of the first electrode, the second electrode, the third electrode and the fourth electrode are set on the one or more buttons, specifically including: the first electrode and the third electrode are set on the volume button, and the second electrode and the fourth electrode are set on the fingerprint key.

[0570] In one possible implementation, one or more buttons of the mobile phone include a first volume button, a second volume button and a fingerprint button, and one or more of the first electrode, the second electrode, the third electrode and the fourth electrode are set on the one or more buttons, specifically including: the first electrode is set on the first volume button, the third electrode is set on the second volume button, and the second electrode and the fourth electrode are set on the fingerprint key.

[0571] When the first electronic device is a mobile phone, the specific description of the mobile phone's shape and electrode distribution can refer to the relevant description of the mobile phone 30 in the embodiment shown in Figures 4A and 4B above.

[0572] In this way, when the first electronic device has different device forms, the electrodes can be set at different positions.

[0573] The various implementation modes of this application can be combined arbitrarily to achieve different technical effects.

[0574] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described herein are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

[0575] Those skilled in the art will appreciate that all or part of the process steps in the above-described method embodiments can be implemented by a computer program instructing the relevant hardware. The program can be stored in a computer-readable storage medium, and when executed, the program can include the process steps in the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM or random access memory (RAM), magnetic disks, or optical disks.

[0576] In short, the above description is only an embodiment of the technical solution of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made based on the disclosure of the present invention should be included in the scope of protection of the present invention.

Claims

1. A monitoring circuit, characterized in that: include: A first electrode, a second electrode, a third electrode, a fourth electrode, a first analog switch, a second analog switch, an excitation current generating unit, and a voltage measuring unit; The first analog switch includes a first port and a second port, and the second analog switch includes a third port and a fourth port; The first electrode is connected to the second electrode through the first port of the first analog switch, the excitation current generating unit and the third port of the second analog switch; The third electrode is connected to the fourth electrode through the fourth port of the second analog switch, the excitation current generating unit and the second port of the first analog switch; The voltage measuring unit is connected to the third electrode and the fourth electrode, or the voltage measuring unit is connected to the first electrode and the second electrode; When the first electrode contacts a first position of the user's skin, the second electrode contacts a second position of the user's skin, and the first position and the second position are respectively located at two ends of chest tissue, the excitation current generating unit is used to generate a current flowing through the user's heart, and the voltage measuring unit is used to measure the voltage at both ends of the user's heart.

2. The circuit according to claim 1, characterized in that The first electrode is connected to the second electrode through the first port of the first analog switch, the excitation current generating unit and the third port of the second analog switch, specifically comprising: The first electrode, the first analog switch, the excitation current generating unit, the second analog switch and the second electrode are connected in sequence, and the first electrode is connected to the first port of the first analog switch, and the second electrode is connected to the third port of the second analog switch; The third electrode is connected to the second electrode through the fourth port of the second analog switch, the excitation current generating unit and the second port of the first analog switch, specifically comprising: The third electrode, the second analog switch, the excitation current generating unit, the first analog switch and the fourth electrode are connected in sequence, and the third electrode is connected to the fourth port of the second analog switch, and the fourth electrode is connected to the second port of the first analog switch.

3. The circuit according to claim 1 or 2, characterized in that: The excitation current generating unit is connected to the first analog switch and the second analog switch.

4. The circuit according to any one of claims 1 to 3, characterized in that: The first analog switch is used to connect the first port or the second port; the second analog switch is used to connect the third port or the fourth port.

5. The circuit according to claim 4, characterized in that The excitation current generating unit is used to generate a current flowing through the user's heart, and the voltage measuring unit is used to measure the voltage across the user's heart, specifically including: When the first analog switch is connected to the first port and the second analog switch is connected to the third port, the excitation current generating unit is used to generate a current flowing through the user's heart, and the voltage measuring unit is used to measure the voltage across the user's heart; or, When the first analog switch is connected to the second port and the second analog switch is connected to the fourth port, the excitation current generating unit is used to generate a current flowing through the user's heart, and the voltage measuring unit is used to measure the voltage across the user's heart.

6. The circuit according to claim 4 or 5, characterized in that When the first analog switch is connected to the first port and the second analog switch is connected to the fourth port, the monitoring circuit is used to determine whether the first electrode and the third electrode are in good contact with the skin.

7. The circuit according to any one of claims 4 to 6, characterized in that: When the first analog switch is connected to the second port and the second analog switch is connected to the third port, the monitoring circuit is used to determine whether the second electrode and the fourth electrode are in good contact with the skin.

8. The circuit according to claim 6 or 7, characterized in that When the first analog switch connects to the first port and the second analog switch connects to the fourth port, or when the first analog switch connects to the second port and the second analog switch connects to the third port, the current frequency generated by the excitation current generating unit is less than the first frequency.

9. The circuit according to any one of claims 1 to 7, characterized in that: The current frequency generated by the excitation current generating unit is greater than the first frequency.

10. An electronic device, being a first electronic device, characterized in that: The first electronic device comprises the circuit of any one of claims 1-9.

11. The electronic device according to claim 10, characterized in that: The first electronic device is an earphone, which includes a left earphone and a right earphone. There is a wired connection between the left earphone and the right earphone, and the first electrode and the third electrode are arranged on the left earphone, and the second electrode and the fourth electrode are arranged on the right earphone.

12. The electronic device according to claim 10, characterized in that: The first electronic device is a wearable device, which includes a movement and a strap. The first electrode and the third electrode are located at one end of the strap, and the second electrode and the fourth electrode are located at the other end of the strap. The length of the strap is greater than the first length.

13. The electronic device according to claim 10, characterized in that: The first electronic device is a wearable device, which includes a movement and a strap. The movement includes a first button and a second button. The first electrode and the third electrode are located on the back of the movement. The second electrode is located on the first button, and the fourth electrode is located on the second button.

14. The electronic device according to claim 10, characterized in that: The first electronic device is a wearable device, which includes a movement and a strap. The movement includes a first button and a second button. The first electrode and the third electrode are located on the strap. The second electrode is located on the first button. The fourth electrode is located on the second button.

15. The electronic device according to claim 10, characterized in that: The first electronic device is a mobile phone, which includes one or more buttons, and one or more of the first electrode, the second electrode, the third electrode and the fourth electrode are arranged on the one or more buttons, and the first electrode, the second electrode, the third electrode and the fourth electrode are not in contact with each other.

16. A monitoring system, characterized in that: The monitoring system comprises a first electronic device and a second electronic device, wherein a wired connection exists between the first electronic device and the second electronic device, and the monitoring system comprises the circuit described in any one of claims 1-9.

17. The system according to claim 16, characterized in that The first electrode and the third electrode are located at the first electronic device, and the second electrode and the fourth electrode are located at the second electronic device.

18. The system according to claim 16 or 17, characterized in that The first electronic device is a headset, and the second electronic device is a mobile phone.

19. A monitoring method, characterized in that: Applied to a first electronic device, the first electronic device is provided with a first circuit, the first circuit includes a first electrode, a second electrode, a third electrode, a fourth electrode, an excitation current generating unit and a voltage measuring unit; the method includes: receiving a first instruction, wherein the first instruction is used to instruct the first electronic device to start cardiac function monitoring; In response to the first instruction, determining that the first electrode is in good contact with the skin through a first circuit, the first circuit comprising the first electrode, the excitation current generating unit and the third electrode; Determining that the second electrode is in good contact with the skin through a second circuit, wherein the second circuit includes the second electrode, the excitation current generating unit and the fourth electrode; Determine the first information through a third loop, the third loop comprising the first electrode, the excitation current generating unit, the voltage measuring unit and the second electrode; the first electrode contacts a first position of the user's skin, the second electrode contacts a second position of the user's skin, the first position and the second position are respectively located at two ends of the chest tissue; Output first information, the first information including one or more of the following: cardiac output, stroke volume, heart rate, ejection fraction, comprehensive result, first result, second result, third result and fourth result, the comprehensive result is used to indicate whether the user's heart function is normal, the first result is used to indicate whether the cardiac output is normal, the second result is used to indicate whether the stroke volume is normal, the third result is used to indicate whether the heart rate is normal, and the fourth result is used to indicate whether the ejection fraction is normal.

20. The method according to claim 19, characterized in that The receiving of the first instruction specifically includes: receiving the first instruction sent by the second electronic device; or, A first operation of a user on the first electronic device is received, and the first instruction is generated.

21. The method according to claim 19 or 20, characterized in that The method further comprises: In response to the first instruction, a first prompt is output, where the first prompt is used to prompt the user to start monitoring cardiac function.

22. The method according to any one of claims 19 to 21, characterized in that Before determining the first information through the third loop, the method further includes: Determine that the user state is a first state; The determining of the first information through the third loop specifically includes: Determine a cardiac function index through the third loop, wherein the cardiac function index includes any one or more of the following: cardiac output, stroke volume, heart rate, and ejection fraction; The first information is determined based on the first state and the cardiac function index.

23. The method according to claim 22, characterized in that The first state is a motion state, a resting state or a sleeping state.

24. The method according to claim 22 or 23, characterized in that The determining that the user state is the first state specifically includes: Detecting that the user state is the first state; or, receiving and responding to a user's operation of setting a state, and determining that the user state is the first state; or, Second information sent by a second electronic device is received, and based on the second information, a user status is determined to be the first status.

25. The method according to any one of claims 22 to 24, characterized in that When the first state is a motion state, the first information further includes a first graph, and the first graph is used to indicate the relationship between the stroke volume and the motion heart rate.

26. The method according to any one of claims 19 to 25, characterized in that The outputting of the first information specifically includes: A second instruction is sent to a second electronic device, where the second instruction is used to instruct the first electronic device to output the first information.

27. The method according to any one of claims 19 to 26, characterized in that The first electronic device is a headset, and the method further includes: Before receiving the first instruction, the earphone plays a first audio; When the first instruction is received, the playing of the first audio is paused.

28. The method according to claim 27, characterized in that The playing of the first audio specifically includes: Play the first audio at a first volume; The outputting of the first information specifically includes: If the user wears the left earphone or the right earphone, the first information is played at the first volume.

29. The method according to claim 28, characterized in that The method further comprises: If the user is not wearing the left earphone and the right earphone, the first information is played at the second volume, and the second volume is greater than the first volume.

30. An electronic device, being a first electronic device, characterized in that: It comprises one or more memories, one or more processors and a first circuit; the first circuit comprises a first electrode, a second electrode, a third electrode, a fourth electrode, a first analog switch, a second analog switch, an excitation current generating unit and a voltage measuring unit; the one or more memories are coupled to the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions, and when the one or more processors execute the computer instructions, the electronic device executes the method described in any one of claims 19 to 29.

31. A chip system, characterized in that: Applied to a first electronic device, the chip system includes: a processing circuit and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processing circuit, and the processing circuit is used to run the code instructions so that the chip system executes the method described in any one of claims 19-29.

32. A readable storage medium, comprising instructions, characterized in that: When the instructions are executed on the first electronic device, the first electronic device is caused to execute the method described in any one of claims 19 to 29.

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