Physiological parameter detection method and related device

Abstract

The invention discloses a physiological parameter detection method and related device.The method is applied to electronic equipment comprising a PPG module, the PPG module can comprise multiple detection modules, each detection module comprises a light source and a photoelectric detector, and the method can comprise the steps that multiple paths of PPG signals are collected through the multiple detection modules, wherein each path of PPG signal is obtained by emitting light rays towards the skin by a light source in one detection module and detecting the light rays reflected by the skin by a photoelectric detector in one detection module, and the plurality of paths of PPG signals at least comprise signals respectively collected by two detection modules at different intervals; the distance of one detection module refers to the distance between a light source and a photodetector in the detection module, and then physiological parameter values related to arterial activity of the user can be determined based on the multiple PPG signals. In this way, the physiological parameters can be measured more accurately by means of the multiple PPG signals.

Description

Technical Field

[0001] The present application relates to the field of terminal and computer technology, and in particular to a physiological parameter detection method and related devices. Background Art

[0002] With the continuous advancement of technology, more and more devices are designed to monitor users' physiological parameters, including: blood oxygen, blood sugar, heart rate, body temperature, blood pressure, blood lipids, blood ketones, respiratory rate, etc.

[0003] Among them, photoplethysmography (PPG) is a technology that uses optical sensors to sense the changes in hemoglobin concentration flowing inside blood vessels on the surface of the human body to obtain the human pulse. Now more and more devices are equipped with PPG modules to collect PPG signals, and then use the PPG signals to analyze the user's blood oxygen, heart rate, respiratory rate, blood pressure, blood sugar, muscle oxygen, vascular resistance, brain oxygen and other physiological parameters related to arterial activity. Summary of the invention

[0004] The present application provides a physiological parameter detection method and related devices, which improve the accuracy of physiological parameter measurement.

[0005] In a first aspect, an embodiment of the present application provides a physiological parameter detection method, which is applied to an electronic device including a photoplethysmography (PPG) module, the PPG module including n (n≥2) detection modules, each detection module including a light source and a photodetector, the method including: collecting n PPG signals through n detection modules; wherein each PPG signal is obtained by a light source in a detection module emitting light toward the skin, and a photodetector in a detection module detecting the light reflected back through the skin, the n PPG signals include at least two signals collected by detection modules with different spacings, and the spacing of a detection module refers to the distance between the light source and the photodetector in the detection module; determining the physiological parameter value of the user based on the n PPG signals, and the physiological parameter value is related to the arterial activity of the user.

[0006] Among them, the signals collected by the two detection modules with different spacings may include two PPG signals, wherein one PPG signal is a signal collected by the detection module with a long spacing, and in this PPG signal, the signal proportion corresponding to the deep tissue is larger, and the other PPG signal is a signal collected by the detection module with a short spacing, and in this PPG signal, the signal proportion corresponding to the shallow tissue is larger.

[0007] In this way, as long as the collected n PPG signals include signals collected by detection modules with different spacings, the electronic device can use the PPG signals collected by the detection modules with short spacings to eliminate or reduce the signals corresponding to the detection tissues in the PPG signals collected by the detection modules with long spacings, thereby improving the accuracy of physiological parameter measurement.

[0008] For example, the PPG module may include a first detection module and a second detection module, and the spacing between the first detection modules may be greater than the spacing between the second detection modules. The electronic device may respectively collect one PPG signal using the first detection module and one PPG signal using the second detection module, and then use the one PPG signal collected by the second detection module to eliminate or reduce the signal corresponding to the shallow tissue in the one PPG signal collected by the first detection module, and then use the processed one PPG signal collected by the first detection module to determine the user's physiological parameter value.

[0009] In combination with the first aspect, in one implementation, before collecting n PPG signals through n detection modules, the method also includes: collecting a first PPG signal through one detection module among the n detection modules; collecting n PPG signals through n detection modules specifically includes: when the physiological parameter value reflected by the first PPG signal is abnormal, or the pulse reflected by the first PPG signal is incomplete, collecting n PPG signals through n detection modules.

[0010] That is to say, when measuring physiological parameters, the electronic device can start only one detection module to measure the physiological parameters. If the detection effect is not good, other detection modules can be started to measure the physiological parameter values ​​using the PPG signals collected by multiple detection modules. In this way, the power consumption of the device can be reduced as much as possible while ensuring the measurement accuracy of the physiological parameters.

[0011] In combination with the first aspect, in one implementation, determining the physiological parameter value based on n-channel PPG signals specifically includes: determining the physiological parameter value based on the n-channel PPG signals and the first PPG signal.

[0012] That is to say, when the electronic device uses multiple PPG signals to determine the value of physiological parameters, it can also perform calculations in combination with the PPG signals collected when the physiological parameters were previously measured using only one detection module, so that the electronic device 100 can use the data collected by itself as much as possible to determine the user's physiological parameters, thereby further improving the accuracy of physiological parameter measurement.

[0013] In combination with the first aspect, in one implementation, the physiological parameter value is a blood oxygen value, and in any detection module in the PPG module, the light emitted by the light source includes at least two wavelengths of light; determining the physiological parameter value of the user based on n PPG signals specifically includes: calculating a ratio value R for each of the n PPG signals, the ratio value R being used to reflect the ratio of the absorption rates of light of different wavelengths in the PPG signal; and determining the user's blood oxygen value based on the n ratio values ​​R corresponding to the n PPG signals.

[0014] That is to say, this solution can be applied to blood oxygen detection, measuring the user's blood oxygen through multiple detection modules and improving the accuracy of blood oxygen measurement.

[0015] In combination with the first aspect, in one implementation, the user's blood oxygen value is determined based on n ratio values ​​R corresponding to n PPG signals: the n ratio values ​​R corresponding to the n PPG signals are input into a first blood oxygen model to obtain the user's blood oxygen value; the first blood oxygen model is used to characterize the mathematical relationship between multiple ratio values ​​and blood oxygen, and the first blood oxygen model is determined based on multiple sets of data sets, wherein one set of data sets includes the blood oxygen value of the test person, and k ratio values ​​R calculated from the PPG signals collected on the measured person using k (k≥1) detection modules.

[0016] In a second aspect, an embodiment of the present application provides a physiological parameter detection method, which is applied to an electronic device including a PPG module, the PPG module including m (m≥2) groups of detection modules, a group of detection modules including one or more detection modules, a detection module including a light source and a photodetector, the method including: collecting m groups of PPG signals through m groups of detection modules; wherein each group of PPG signals includes one PPG signal collected by each detection module in a group of detection modules, one PPG signal is obtained by a light source in a detection module emitting light toward the skin, and a photodetector in a detection module detects the light reflected back through the skin, the m groups of PPG signals include a first group of PPG signals, the first group of PPG signals include at least two signals collected by detection modules with different spacings, the spacing of a detection module refers to the distance between the light source and the photodetector in the detection module; m physiological parameter values ​​are determined based on the m groups of PPG signals, each physiological parameter value is determined based on a group of PPG signals; a physiological parameter value of the user is determined based on the m physiological parameter values, and the physiological parameter value is related to the arterial activity of the user.

[0017] Among them, the signals collected by the two detection modules with different spacings may include two PPG signals, wherein one PPG signal is a signal collected by the detection module with a long spacing, and in this PPG signal, the signal proportion corresponding to the deep tissue is larger, and the other PPG signal is a signal collected by the detection module with a short spacing, and in this PPG signal, the signal proportion corresponding to the shallow tissue is larger.

[0018] In this way, as long as the multi-channel PPG signals collected by a group of detection modules include signals collected by detection modules with different spacings, the electronic device can use the PPG signals collected by the detection modules with short spacings to eliminate or reduce the signals corresponding to the detection tissues in the PPG signals collected by the detection modules with long spacings, thereby improving the accuracy of calculating physiological parameters using the PPG signals collected by this group of detection modules.

[0019] For example, the PPG module may include a first group of detection modules and a second group of detection modules, wherein the first group of detection modules may include a first detection module and a second detection module, the spacing between the first detection modules may be greater than the spacing between the second detection modules, and the second group of detection modules may include one or more detection modules. The electronic device may respectively collect one PPG signal using the first detection module and one PPG signal using the second detection module, and then use the one PPG signal collected by the second detection module to eliminate or reduce the signal corresponding to the superficial tissue in the one PPG signal collected by the first detection module, and then use the processed one PPG signal collected by the first detection module to determine a physiological parameter value corresponding to the first group of detection modules, and similarly, use one or more PPG signals collected by the second group of detection modules to determine a physiological parameter value corresponding to the second group of detection modules, and then the electronic device may determine the user's physiological parameter value based on a physiological parameter value corresponding to the first group of detection modules and a physiological parameter value corresponding to the second group of detection modules.

[0020] It can be seen that using multiple physiological parameter values ​​collected by multiple groups of detection modules to finally determine the user's physiological parameter values ​​can minimize the impact of the PPG wearing position on the accuracy of physiological parameter measurement and improve the accuracy and stability of physiological parameter measurement.

[0021] In combination with the second aspect, in one implementation, the two groups of detection modules in the PPG module include at least the same light source and / or at least the same photodetector.

[0022] That is to say, the devices between different groups of detection modules can be reused, which can save the cost of the equipment and reduce power consumption.

[0023] In combination with the second aspect, in one implementation, the physiological parameter value of the user is the maximum value, minimum value, average value, median value or mode among the m physiological parameter values.

[0024] In other words, multiple physiological parameter values ​​can be used to comprehensively consider the final physiological parameter situation of the user, thereby reducing the error in evaluating the user's physiological parameters.

[0025] In combination with the second aspect, in one implementation, the physiological parameter value is a blood oxygen value. In any detection module in the PPG module, the light emitted by the light source includes at least two wavelengths of light. Among the m blood oxygen values, one blood oxygen value is determined by one or more ratio values ​​R corresponding to a group of PPG signals, and a ratio value R is determined based on one PPG signal in a group of PPG signals. The ratio value R is used to reflect the ratio of the absorption rates of light of different wavelengths in the PPG signal.

[0026] That is to say, this solution can be applied to blood oxygen detection, measuring the user's blood oxygen through multiple detection modules and improving the accuracy of blood oxygen measurement.

[0027] In combination with the second aspect, in one implementation, a blood oxygen value is obtained by inputting one or more ratio values ​​R into a first blood oxygen model, the first blood oxygen model is used to characterize the mathematical relationship between multiple ratio values ​​and blood oxygen, and the first blood oxygen model is determined based on multiple sets of data sets, wherein one set of data sets includes the blood oxygen value of the test person, and k ratio values ​​R calculated from PPG signals collected from the measured person using k (k≥1) detection modules.

[0028] In combination with the second aspect, in one implementation, before collecting m groups of PPG signals through m groups of detection modules, the method also includes: collecting a first PPG signal through one detection module among the m groups of detection modules; collecting m groups of PPG signals through m groups of detection modules specifically includes: when the physiological parameter value reflected by the first PPG signal is abnormal, or the pulse reflected by the first PPG signal is incomplete, collecting m groups of PPG signals through m groups of detection modules.

[0029] That is to say, when measuring physiological parameters, the electronic device can start only one detection module to measure the physiological parameters. If the detection effect is not good, other detection modules can be started to measure the physiological parameter values ​​using the PPG signals collected by multiple detection modules. In this way, the power consumption of the device can be reduced as much as possible while ensuring the measurement accuracy of the physiological parameters.

[0030] In combination with the second aspect, in one implementation, determining the physiological parameter value of the user based on the m physiological parameter values ​​corresponding to the m groups of PPG signals specifically includes: determining the physiological parameter value of the user based on the m physiological parameter values ​​corresponding to the m groups of PPG signals and the first PPG signal.

[0031] That is to say, when the electronic device uses multiple PPG signals to determine the value of physiological parameters, it can also perform calculations in combination with the PPG signals collected when the physiological parameters were previously measured using only one detection module, so that the electronic device 100 can use the data collected by itself as much as possible to determine the user's physiological parameters, thereby further improving the accuracy of physiological parameter measurement.

[0032] In combination with the first aspect and the second aspect, in one implementation, the method further includes: when the physiological parameter value reflected by the first PPG signal is normal, or the pulse reflected by the first PPG signal is complete, determining the physiological parameter value determined based on the first PPG signal as the physiological parameter value of the user.

[0033] That is to say, if the electronic device can accurately measure the physiological parameters of the user using only one detection module, there is no need to start multiple detection modules, thereby reducing the power consumption and computing power of the electronic device.

[0034] In combination with the first aspect and the second aspect, in one implementation, the physiological parameter value is the magnitude of a first physiological parameter, and the first physiological parameter includes any one or more of the following: blood oxygen, heart rate, respiratory rate, blood pressure, blood sugar, muscle oxygen, vascular resistance or brain oxygen.

[0035] In combination with the first aspect and the second aspect, in one implementation, the two detection modules in the PPG module include at least the same light source or at least the same photodetector.

[0036] That is to say, devices between different detection modules can be reused, which can save equipment costs and reduce power consumption.

[0037] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a PPG module, a memory, one or more processors, and one or more programs; the PPG module includes n (n≥2) detection modules, each detection module includes a light source and a photodetector, and when the one or more processors execute one or more programs, the electronic device implements the method described in the first aspect or any one of the implementation methods of the first aspect.

[0038] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising: a PPG module, a memory, one or more processors, and one or more programs; the PPG module comprises m (m≥2) groups of detection modules, each group of detection modules comprises one or more detection modules, each detection module comprises a light source and a photodetector, and when the one or more processors execute one or more programs, the electronic device implements the method described in the second aspect or any one of the implementation methods of the second aspect.

[0039] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, comprising instructions, which, when executed on an electronic device, cause the electronic device to execute a method as described in the first aspect or any one of the implementations in the first aspect, or the second aspect or any one of the implementations in the second aspect.

[0040] In a sixth aspect, an embodiment of the present application provides a computer program product. When the computer program product runs on a computer, it enables the computer to execute the method described in the first aspect or any one of the implementations of the first aspect, the second aspect or any one of the implementations of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1A A schematic diagram of the principle of blood oxygen detection;

[0042] Figure 1B This is a schematic diagram of the composition principle of the PPG signal collected when detecting blood oxygen;

[0043] Figure 2 A schematic diagram of the principle of blood oxygen detection provided in an embodiment of the present application;

[0044] Figure 3A A schematic diagram of the hardware structure of an electronic device 100 provided in an embodiment of the present application;

[0045] Figure 3B A schematic diagram of the structure of a PPG module 193 provided in an embodiment of the present application;

[0046] Figure 4 A schematic diagram of a physiological parameter detection method provided in an embodiment of the present application;

[0047] Figure 5 A schematic diagram of a PPG signal provided in an embodiment of the present application;

[0048] Figure 6 A flowchart of a detailed method for determining blood oxygen value using n-channel PPG signals provided in an embodiment of the present application;

[0049] Figure 7 A schematic diagram of the structure of a PPG module provided in an embodiment of the present application;

[0050] Figure 8 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0051] Fig. 9 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0052] Fig.10 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0053] Fig.11 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0054] Fig.12 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0055] Fig.13 A schematic diagram of a process flow of another physiological parameter detection method provided in an embodiment of the present application;

[0056] Fig.14 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0057] Fig.15 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0058] Fig.16 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0059] Fig.17 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0060] Fig.18 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0061] Fig.19 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0062] Fig. 20 Another structural schematic diagram of the PPG module provided in an embodiment of the present application;

[0063] Fig.21 A schematic diagram of a process flow of another physiological parameter detection method provided in an embodiment of the present application;

[0064] Fig. 22 A schematic diagram of a process flow of another physiological parameter detection method provided in an embodiment of the present application;

[0065] Fig.23 This is a schematic diagram of the structure of a physiological parameter detection device 200 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present application will be described clearly and in detail below 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 of associated 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.

[0067] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0068] The term "user interface (UI)" in the following embodiments of the present 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 can be recognized by the user. The commonly used form of user interface is a graphical user interface (GUI), which refers to a user interface related to computer operation 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.

[0069] Blood oxygen, also known as blood oxygen saturation (SpO2), refers to the oxygen in the blood. It measures the ability of the blood to transport oxygen and is one of the important indicators of the function of the respiratory and circulatory systems. Accurate monitoring of blood oxygen levels is of great value for the assessment of human health.

[0070] Figure 1A A schematic diagram of the principle of blood oxygen detection is shown.

[0071] like Figure 1A As shown in Figure 1, the current blood oxygen detection is mainly achieved through the PPG module. The PPG module includes a light source, such as Figure 1AThe light emitting diode (LED) and the photoelectric detector (PD) shown in the figure have a certain distance between them. The light source emits light toward the skin. The light passes through the skin tissue and is absorbed and scattered by the tissue, and finally returns to the surface of the skin to be detected by the photoelectric detector to obtain the PPG signal, thereby calculating the blood oxygen value based on the PPG signal.

[0072] It can be seen that a light source and a photodetector work in pairs, a light source emits light, and a photodetector is used to detect the light emitted by the light source and finally reflected back after being absorbed by the skin to obtain a PPG signal. For ease of description, the two paired light sources and photodetectors are collectively referred to as a detection module below. It should be understood that this name does not constitute a limitation on the embodiments of the present application.

[0073] For example, Figure 1B The figure shows a schematic diagram of the composition principle of the PPG signal collected when detecting blood oxygen.

[0074] like Figure 1B As shown, the light emitted by the light source will be absorbed and scattered by the shallow tissue and deep tissue after passing through the skin tissue. Finally, the light passing through the shallow tissue returns to the skin surface and is detected by the photodetector, thereby collecting the signal corresponding to the shallow tissue. The light passing through the deep tissue returns to the skin surface and is detected by the photodetector, thereby collecting the signal corresponding to the deep tissue. The signal corresponding to the shallow tissue and the signal corresponding to the deep tissue ultimately constitute the PPG signal collected by the photodetector.

[0075] Among them, since shallow tissue usually has no arteries, the signals corresponding to shallow tissue are the signals corresponding to tissues such as veins and capillaries, which contain no or less pulse blood oxygen information and cannot be used to analyze the user's blood oxygen condition. Deep tissue contains dermal arterioles, so the signals corresponding to deep tissue are the target signals for blood oxygen detection and can be used to analyze the user's blood oxygen condition.

[0076] However, the light emitted by the existing PPG module will inevitably pass through the superficial tissue of the skin. Therefore, the obtained PPG signal will definitely include the interference signal of the superficial tissue. Then, directly using the PPG signal collected by the photodetector to analyze the user's blood oxygen will affect the accuracy of the user's blood oxygen detection.

[0077] Moreover, in daily use, factors such as improper wearing, exercise of the wearer, and low temperature may cause the proportion of signals corresponding to shallow tissues in the PPG signal to increase. When the proportion of signals corresponding to shallow tissues is too large, it will cause abnormal PPG signals, thereby further reducing the accuracy of blood oxygen detection.

[0078] Considering that in a detection module, the longer the distance between the light source and the photodetector, the deeper the tissue depth that the light can reach, and conversely, the shorter the distance between the light source and the photodetector, the shallower the tissue depth that the light can reach.

[0079] Therefore, an embodiment of the present application designs a PPG module that includes at least two detection modules. In the two detection modules, the distances between the light source and the photodetector are different, so that the PPG signals acquired by the two detection modules contain signals corresponding to shallow tissue and deep tissue in different proportions.

[0080] Among them, the PPG signal acquired by the long-spacing detection module has a larger proportion of signals corresponding to deep tissues, and the PPG signal acquired by the short-spacing detection module has a larger proportion of signals corresponding to shallow tissues. Therefore, the PPG signal acquired by the short-spacing detection module can be used to exclude or reduce the interference of interfering signals in the PPG signal collected by the long-spacing detection module, thereby achieving more accurate blood oxygen detection.

[0081] Exemplarily, a spacing greater than a threshold is a long spacing, and a spacing less than a threshold is a short spacing. In the embodiment of the present application, the threshold may be 4 mm, that is, a long spacing may refer to a spacing greater than 4 mm, and a short spacing may refer to a spacing less than 4 mm. The embodiment of the present application does not limit the threshold.

[0082] It can be understood that in addition to blood oxygen detection which can calculate the blood oxygen value through the PPG signal obtained by the reflective PPG module, some other physiological parameters, such as heart rate, respiratory rate, blood pressure, blood sugar, muscle oxygen, vascular resistance, brain oxygen, etc., can also be measured through the PPG signal reflected by the skin tissue. Therefore, for physiological parameters related to arterial activity, the PPG module designed in the embodiment of the present application can be used for detection.

[0083] It can be seen that the embodiment of the present application provides a physiological parameter detection method, which can use the above-mentioned PPG module including multiple detection modules to collect multi-channel PPG signals, and then use the multi-channel PPG signals to calculate the user's physiological parameter values, thereby improving the accuracy of physiological parameter measurement.

[0084] It should be noted that different detection modules can share the same light source or the same photodetector. Therefore, the PPG module provided in the embodiment of the present application may include: one or more light sources and multiple photodetectors, or multiple light sources and one or more photodetectors.

[0085] For example, Figure 2 A schematic diagram showing the principle of blood oxygen detection provided in an embodiment of the present application is shown.

[0086] like Figure 2 As shown, the PPG module may include two light sources (LED1, LED2) and a photodetector (PD). The distance between LED1 and PD is greater than the distance between LED2 and PD. LED1 and PD constitute a detection module, and LED2 and PD constitute a detection module.

[0087] Then, in the actual process of measuring blood oxygen, LED1 and LED2 can be turned on at different time points, so that PD can collect light reflected from different light sources at different time points to obtain PPG signals, where the light reflected by LED1 corresponds to the PPG signal (hereinafter referred to as PPG signal 1) containing a larger proportion of signals corresponding to deep tissues, and the light reflected by LED2 corresponds to the PPG signal (hereinafter referred to as PPG signal 2) containing a larger proportion of signals corresponding to shallow tissues. Then, PPG signal 1 and PPG signal 2 can be used to calculate the user's blood oxygen value.

[0088] Understandably, Figure 2 The PPG module shown is only one example. In other embodiments of the present application, the number and position of the light source and the photodetector may also exist in other situations. Figure 2 The principle of blood oxygen detection described using blood oxygen as an example has similar measurement principles for other physiological parameters, such as heart rate, respiratory rate, blood pressure, blood sugar, muscle oxygen, vascular resistance, brain oxygen, etc., which will not be repeated here.

[0089] Figure 3A A schematic diagram of the hardware structure of the electronic device 100 provided in an embodiment of the present application.

[0090] The electronic device 100 may be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a wearable 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 special restrictions on the specific type of the electronic device.

[0091] Preferably, in the embodiment of the present application, the electronic device 100 may refer to a wearable device such as a watch, a bracelet, a ring, etc. worn on the user.

[0092] The electronic device 100 may include a processor 110, an internal memory 121, a charging management module 140, a power management module 141, a battery 142, a sensor module 180, a PPG module 193, and a display screen 194. Optionally, the electronic device 100 may also include any one or more of the following: a wireless communication module 160, an audio module 170, a button 190, a motor 191, an indicator 192, etc. Among them, the audio module 170 may include any one or more of the following: a speaker 170A, a receiver 170B, and a microphone 170C. The sensor module 180 may include a touch sensor 180A, etc.

[0093] 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 processor (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), etc. Different processing units may be independent devices or integrated into one or more processors.

[0094] In some embodiments, the processor 110 may be used to control the PPG module 193 to collect PPG signals, and calculate physiological parameter values ​​of the user based on the collected PPG signals.

[0095] 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.

[0096] The processor 110 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may store instructions or data that the processor 110 has just used or cyclically used. If the processor 110 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

[0097] In some embodiments, the processor 110 may include one or more interfaces. The interface 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, etc.

[0098] The charging management module 140 is used to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 may receive charging input from a wired charger. In some wireless charging embodiments, the charging management module 140 may receive wireless charging input via a wireless charging coil of the electronic device 100. While the charging management module 140 is charging the battery 142, it may also power the electronic device via the power management module 141.

[0099] 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 screen 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 number, battery health status (leakage, impedance), etc. 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.

[0100] The wireless communication module 160 can provide wireless communication solutions for application in 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), NearLink, intrabody communication (IBC), etc. Exemplarily, when two electronic devices communicate using a human body communication solution, the two electronic devices are equipped with at least one electrode in contact with the skin, and the two electronic devices send and receive information to each other through the human body through the above-mentioned electrode in contact with the skin. The wireless communication module 160 can be one or more devices that integrate at least one communication processing module.

[0101] The electronic device 100 implements the display function through a GPU, a display screen 194, and an application processor. The GPU is a microprocessor for image processing, which connects the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs that execute program instructions to generate or change display information.

[0102] The display screen 194 is used to display images, videos, etc. The display screen 194 includes a display panel. The display panel can be a liquid crystal display (LCD), and 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), Miniled, MicroLed, Micro-oLed, quantum dot light emitting diodes (QLED), etc. In some embodiments, the electronic device 100 may include 1 or N display screens 194, where N is a positive integer greater than 1.

[0103] In some embodiments, the display screen 194 may be used to display physiological parameter values ​​of the user.

[0104] The internal memory 121 may include one or more random access memories (RAM) and one or more non-volatile memories (NVM). The random access memory can be directly read and written by the processor 110, and can be used to store executable programs (such as machine instructions) of the operating system or other running programs, and can also be used to store user and application data. The non-volatile memory can also store executable programs and store user and application data, etc., and can be loaded into the random access memory in advance for direct reading and writing by the processor 110.

[0105] In some embodiments, the internal memory 121 may be used to store the PPG signals collected by the PPG module 193 and the physiological parameter values ​​of the user calculated by the processor 110 .

[0106] The electronic device 100 can implement audio functions such as music playing and recording through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, and the application processor.

[0107] 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 arranged in the processor 110, or some functional modules of the audio module 170 can be arranged in the processor 110.

[0108] The speaker 170A, also called a "speaker", is used to convert an audio electrical signal into a sound signal. The electronic device 100 can listen to music or listen to a hands-free call through the speaker 170A.

[0109] The receiver 170B, also called a "earpiece", is used to convert audio electrical signals into sound signals. When the electronic device 100 receives a call or voice message, the voice can be received by placing the receiver 170B close to the human ear.

[0110] Microphone 170C, also called "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 microphone 170C to input the sound signal into 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 sound source, realize directional recording function, etc.

[0111] The touch sensor 180A is also called a "touch control device". The touch sensor 180A can be set on the display screen 194, and the touch sensor 180A and the display screen 194 form a touch screen, also called a "touch control screen". The touch sensor 180A is used to detect touch operations acting on or near it. The touch sensor can pass the detected touch operation to the application processor to determine the type of touch event. Visual output related to the touch operation can be provided through the display screen 194. In other embodiments, the touch sensor 180A can also be set on the surface of the electronic device 100, which is different from the position of the display screen 194.

[0112] The key 190 includes a power key, a volume key, etc. The key 190 may be a mechanical key or a touch key. The electronic device 100 may receive key input and generate key signal input related to user settings and function control of the electronic device 100.

[0113] 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.

[0114] The indicator 192 may be an indicator light, which may be used to indicate the charging status, power changes, messages, missed calls, notifications, etc.

[0115] The PPG module 193 can be used to collect PPG signals, which can be used to calculate the size of physiological parameters related to the functional state of the user's cardiovascular system. For example, the physiological parameters may refer to blood oxygen, heart rate, respiratory rate, blood pressure, etc.

[0116] The PPG module 193 may include one or more light sources and a plurality of photodetectors, or a plurality of light sources and one or more photodetectors. One light source and one photodetector may constitute a detection module.

[0117] In the embodiment of the present application, the PPG module 193 may include n (n≥2) detection modules, and the photodetector in each detection module may be used to collect the PPG signal corresponding to the light source in the detection module.

[0118] Furthermore, the n detection modules include at least two types of detection modules with different spacings, and there may be one or more detection modules with different spacings. The spacing of the detection modules refers to the distance between the light source and the photodetector in the detection module.

[0119] The light source may refer to a light emitting diode or a laser. The light source may emit light. After the light is irradiated onto the skin, the photodetector detects the remaining reflected light after the light is absorbed by the blood and tissues during the penetration process, and converts it into an electrical signal to obtain a PPG signal. Since the intensity of the reflected light varies with the arterial pulsation, the PPG signal also follows the arterial pulsation, that is, the user's heartbeat has a rhythmic fluctuation, so the user's blood oxygen, heart rate, respiratory rate, blood pressure, blood sugar, muscle oxygen, vascular resistance, brain oxygen and other physiological parameters can be calculated through the PPG signal.

[0120] For example, Figure 3B A schematic diagram of the structure of a PPG module 193 provided in an embodiment of the present application.

[0121] like Figure 3B As shown, the PPG module 193 includes a total of 6 light sources and 6 photodetectors, among which 3 light sources are located in the inner ring, forming the three vertices of a triangle, and the other 3 light sources and 6 photodetectors are located in the outer ring, arranged around the center point of the PPG module.

[0122] Furthermore, the light source located in the inner ring (eg Figure 3B The light source 2 in the middle and the light source located in the outer ring (e.g. Figure 3B The light source 1) in the embodiment may be different. The light source 1 may emit red light and infrared light, and the light source 2 may emit red light, infrared light and green light.

[0123] In the embodiment of the present application, if the physiological parameter measured is blood oxygen, a light source emitting red light and infrared light can be used, and if the physiological parameter measured is heart rate, a light source emitting green light can be used. It can be seen that when measuring different physiological parameters, the PPG module can use light sources of different wavelengths.

[0124] Understandably, Figure 3BIt is only a possible PPG module schematic diagram provided in an embodiment of the present application. In other embodiments of the present application, the PPG module may also present other structures, and the light source in the PPG module may also emit light of more or fewer wavelengths, and the embodiment of the present application does not limit this.

[0125] Specific about Figure 3B The working principle of the PPG module 193 shown can be found in the following Fig. 20 The content of this article will not be expanded here.

[0126] In some embodiments, the sensor module 180 of the electronic device 100 may further include any one or more of the following sensors: a pressure sensor, an acceleration sensor, an air pressure sensor, a temperature sensor, a gyroscope sensor, etc. Among them:

[0127] The pressure sensor can be used to sense the pressure signal and convert the pressure signal into an electrical signal. In some embodiments, the pressure sensor can be set on the display screen 194. The electronic device 100 can also calculate the touch position based on the detection signal of the pressure sensor. In some embodiments, touch operations acting on the same touch position but with different touch operation intensities can correspond to different operation instructions.

[0128] The acceleration sensor can detect the magnitude of the acceleration of the electronic device 100 in all directions (generally three axes). When the electronic device 100 is stationary, the magnitude and direction of gravity can be detected. It can also be used to identify the posture of the electronic device and is applied to applications such as horizontal and vertical screen switching and pedometers.

[0129] The air pressure sensor can be used to measure air pressure. In some embodiments, the air pressure sensor can also be used to measure water pressure.

[0130] The temperature sensor can be used to measure the user's body temperature or the temperature of the user's environment.

[0131] The gyro sensor may 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) may be determined by the gyro sensor.

[0132] It is to be understood that the structure illustrated in the embodiment of the present application 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 in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0133] Figure 4 A schematic diagram of a flow chart of a physiological parameter detection method provided in an embodiment of the present application.

[0134] S101. The electronic device 100 collects n PPG signals through n detection modules in the PPG module, wherein the n PPG signals include at least two signals collected by detection modules with different spacings, and the spacing of a detection module refers to the distance between the light source and the photodetector in the detection module.

[0135] The electronic device 100 may be a wearable device worn by a user, such as a watch, a bracelet, a ring, etc.

[0136] The electronic device 100 may include a PPG module, which may refer to the above-mentioned Figure 3A PPG module 193 mentioned in.

[0137] Among them, the PPG module can include n (n≥2) detection modules, each detection module can include a light source and a photodetector, and the photodetector in this detection module can be used to collect a PPG signal corresponding to the light source in this detection module.

[0138] In some embodiments, the devices included in different detection modules may be independent of each other, or the devices included in different detection modules may be reused. Then, if there are two detection module reused devices in n detection modules, the two detection modules may include at least the same light source or at least the same photodetector. The reuse of devices included in different detection modules helps save costs and power consumption.

[0139] The electronic device 100 collects a PPG signal through a detection module, which may specifically include: the electronic device 100 controls the light source in this detection module, such as a light-emitting diode to emit light toward the skin, and then uses the photodetector in this detection module to detect the light reflected back through the skin and convert it into an electrical signal, thereby obtaining a PPG signal.

[0140] Since the distance between the light source and the photodetector in a detection module is different, the depth of the skin tissue that the light emitted by the light source can reach is different, and the proportion of the signals reflected by the shallow tissue and the deep tissue contained in the PPG signal detected by the photodetector is different.

[0141] Among them, the shorter the distance between the light source and the photodetector, the shallower the depth of the skin tissue that the light emitted by the light source can reach, and the greater the proportion of the signal corresponding to the shallow tissue contained in the PPG signal detected by the photodetector relative to the proportion of the signal corresponding to the deep tissue; the longer the distance between the light source and the photodetector, the deeper the depth of the skin tissue that the light emitted by the light source can reach, and the greater the proportion of the signal corresponding to the deep tissue contained in the PPG signal detected by the photodetector relative to the proportion of the signal corresponding to the shallow tissue.

[0142] Therefore, since the n detection modules include at least two detection modules with different spacings, the n PPG signals collected by the electronic device 100 include at least two PPG signals with different compositions, where the composition may refer to the ratio of signals corresponding to tissues at different depths.

[0143] Exemplarily, the following situations may occur when executing step S101:

[0144] 1) After receiving the user's operation of detecting physiological parameters, the electronic device 100 may trigger the execution of step S101

[0145] The electronic device 100 may provide a user interface for measuring physiological parameters, so that the user may turn on or off the measurement of physiological parameters based on the user interface, so that the user may understand his or her physical condition at any time.

[0146] 2) When the electronic device 100 meets the preset conditions, it can trigger the execution of step S101

[0147] The preset condition may refer to reaching a preset time, detecting that the user is in a stationary state, and the like.

[0148] In this way, the electronic device 100 can automatically identify the best time to measure the physiological parameters, automatically trigger the measurement of the physiological parameters, and provide the user with an intelligent and convenient physiological parameter monitoring service.

[0149] It is understandable that the electronic device 100 can also trigger the collection of PPG signals in other situations, and the embodiment of the present application is not limited to this.

[0150] In some embodiments, due to the different physiological parameters detected, the light emitted by the light source may be different, and the electronic device 100 may select the light emitted by the light source according to the measured physiological parameters. For example, if the detected physiological parameter is blood oxygen, the light emitted by the light source may include red light and infrared light, and if the detected physiological parameter is heart rate, the light emitted by the light source may be green light.

[0151] It should be noted that when the electronic device 100 collects PPG signals through n detection modules, the electronic device 100 can simultaneously start n detection modules to collect n PPG signals, or start different detection modules to collect PPG signals at different time points, which can be determined by the layout of the light sources and photodetectors in the n detection modules. For details on how the electronic device 100 starts n detection modules, please refer to the subsequent Figure 7-Figure 12 The relevant contents in the specific PPG module will not be expanded here.

[0152] S102. The electronic device 100 determines a physiological parameter value of the user based on the n-channel PPG signals, where the physiological parameter value is related to the arterial activity of the user.

[0153] The physiological parameter value may refer to the magnitude of the first physiological parameter of the user. Exemplarily, the first physiological parameter may refer to any one or more of the following: blood oxygen, heart rate, respiratory rate, blood pressure, blood sugar, muscle oxygen, vascular resistance or brain oxygen, etc.

[0154] Since the PPG signal collected by the long-spacing detection module contains a larger proportion of signals corresponding to deep tissues, and the PPG signal collected by the short-spacing detection module contains a larger proportion of signals corresponding to shallow tissues, when determining the value of the physiological parameter, the electronic device 100 can use the PPG signal corresponding to the short spacing to remove or reduce the interference signal in the PPG signal corresponding to the long spacing, and then use the processed PPG signal corresponding to the long spacing to determine the value of the physiological parameter.

[0155] It can be seen from steps S101-S102 that the electronic device 100 can use multiple PPG signals to calculate physiological parameter values. Compared with using only one PPG signal, using multiple PPG signals can eliminate or reduce the influence of signals corresponding to shallow tissues on the calculated physiological parameter values, thereby improving the accuracy of physiological parameter measurement.

[0156] The following takes blood oxygen as an example of the physiological parameter measured by the electronic device 100 to describe in detail the detailed process of the electronic device 100 determining the value of the physiological parameter based on n-channel PPG signals.

[0157] Blood oxygen refers to the percentage of oxygenated hemoglobin (HbO2) in the blood that is bound to oxygen to the total hemoglobin (Hb) capacity that can be bound. It can be specifically expressed by the following formula 1:

[0158]

[0159] Since oxygenated hemoglobin and deoxygenated hemoglobin have different absorption rates for light sources of different wavelengths, the electronic device 100 can use the different light components in the collected PPG signal to calculate the ratio of the absorption rates of light of different wavelengths, that is, the ratio value R, and then use the ratio value R calculated corresponding to different PPG signals to calculate the user's blood oxygen value.

[0160] Figure 5 A schematic diagram of a PPG signal provided in an embodiment of the present application.

[0161] like Figure 5As shown, the PPG signal can be decomposed into an AC component and a DC component, wherein the AC component represents the alternating current part of the PPG signal, which has the same frequency variation as the pulse and is used to determine the blood flow, and the DC component represents the direct current part of the PPG signal and is used to represent skin tissue and average blood volume.

[0162] For example, if the electronic device 100 uses red light and infrared light as light sources to measure blood oxygen, the PPG signal collected by the electronic device 100 may include two signals: a PPG signal corresponding to red light, and a PPG signal corresponding to infrared light. The ratio value R can be calculated by the following formula 2:

[0163]

[0164] Among them, AC red Represents the AC component in the PPG signal corresponding to red light, DC red represents the DC component in the PPG signal corresponding to red light, AC IR Indicates the AC component in the PPG signal corresponding to infrared light, DC IR Represents the DC component in the PPG signal corresponding to infrared light.

[0165] Exemplarily, for the PPG signal corresponding to any wavelength of light, the PPG signal can be filtered using a filter with a frequency of 0.5-5 Hz to obtain an AC component, and the PPG signal can be filtered using a low-pass filter with a frequency below 0.5 Hz to obtain a DC component. Then, according to the peak position and trough position in the AC component, the AC component and DC component required by Formula 2 can be obtained.

[0166] If the electronic device 100 uses only one PPG signal to calculate the blood oxygen value, the Beer-Lambert theorem shows that the blood oxygen value SpO2 and the ratio value R are in a linear relationship. Therefore, the mathematical relationship between the blood oxygen value SpO2 and the ratio value R can be expressed by the following formula 3:

[0167] SpO2=AB*R Formula 3

[0168] Wherein, SpO2 represents the blood oxygen value, R represents the ratio value, A and B are parameters, and A and B can be obtained by fitting the hypoxia experimental data.

[0169] In the embodiment of the present application, when the electronic device 100 uses multiple PPG signals to calculate the blood oxygen value, the electronic device 100 can construct a multi-interval blood oxygen model shown in the following formula 4:

[0170] SpO2=a1*R1+a2*R2+…a n *Rn+a n+1 Formula 4

[0171] Among them, a1, a2, ..., a n 、a n+1 It can be a parameter in a multi-interval blood oxygen model, R1, R2, ..., Rn represent n ratio values ​​calculated by the electronic device 100 using the PPG signal collected by the PPG module, and SpO2 represents the blood oxygen value.

[0172] For example, the multi-interval blood oxygen model can be constructed by using methods such as multivariate linear fitting, neural network, XGBoost, etc. The parameters a1, a2, ..., a in the multi-interval blood oxygen model are n 、a n+1 It can be determined by multiple sets of data sets, where one set of data sets includes the blood oxygen value of the test person and k ratio values ​​R calculated using PPG signals collected from the measured person using k (k≥1) detection modules.

[0173] Below through Figure 6 The process of the electronic device 100 determining the blood oxygen value using n-channel PPG signals is described in detail.

[0174] Figure 6 A flowchart of a detailed method for determining blood oxygen value using n-channel PPG signals provided in an embodiment of the present application.

[0175] like Figure 6 As shown, the above step S102 can be expanded into the following steps in detail:

[0176] S201. The electronic device 100 calculates a ratio value R for each of the n PPG signals, where the ratio value R is used to reflect the ratio of the absorption rates of light of different wavelengths in the PPG signal.

[0177] For each of the n PPG signals, the electronic device 100 may use the above formula 2 to calculate the ratio value R.

[0178] S202. The electronic device 100 determines the blood oxygen value based on the n ratio values ​​R corresponding to the n PPG signals.

[0179] Exemplarily, the electronic device 100 may input n ratio values ​​R into a multi-spacing blood oxygen model to obtain a blood oxygen value. The multi-spacing blood oxygen model is used to characterize the mathematical relationship between multiple ratio values ​​and blood oxygen. The multi-spacing blood oxygen model can refer to the above formula 4.

[0180] Exemplarily, the multi-interval blood oxygen model may be preset in the electronic device 100 by a developer.

[0181] For example, assuming that n is 2, the n signals collected by the electronic device 100 may include: a first PPG signal and a second PPG signal. The first PPG signal may be collected by a long-spacing detection module, and the second PPG signal may be collected by a short-spacing detection module. The electronic device 100 may calculate two ratio values: R1 and R2.

[0182] The electronic device 100 can input the ratio value R1 and the ratio value R2 into the following formula 3 to calculate the user's blood oxygen value:

[0183] SpO2=a*R1+b*R2+c Formula 5

[0184] Among them, a, b, and c may be parameters in a multi-interval blood oxygen model. The multi-interval blood oxygen model may be obtained by training the PPG signal collected from the measured person using two detection modules with different intervals when the blood oxygen of the measured person is known.

[0185] It can be understood that the above formulas 4 and 5 are multi-spacing blood oxygen models constructed under the premise that the blood oxygen value and the multiple ratio values ​​R are in a linear relationship. In other embodiments of the present application, the blood oxygen value and the ratio value R may also present other mathematical relationships. Then, the mathematical formula of the multi-spacing blood oxygen model is not limited to the above formulas 4 or 5. For example, formula 5 may also be transformed into: SpO2=a*R1 2 +b*R2+c. That is, the above formula 4 or formula 5 is not used to limit the multi-interval blood oxygen model mentioned in the embodiment of the present application.

[0186] Combine the following Figure 7-Figure 12 The possible structures of the PPG module involved in the embodiments of the present application are introduced.

[0187] Figure 7 A structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0188] like Figure 7 As shown, the PPG module in the electronic device 100 may include a photodetector PD and two light sources: LED1 and LED2. Among them, LED1 and PD may constitute a detection module, LED2 and PD may constitute a detection module, and the distance between LED1 and PD is smaller than the distance between LED2 and PD.

[0189] For example, when the electronic device 100 collects PPG signals, the electronic device 100 can first control LED1 to emit light, and collect light reflected from the skin through PD, so as to obtain the corresponding PPG signal at the distance between LED1 and PD. After that, the electronic device 100 can control LED2 to emit light, and collect light reflected from the skin through PD, so as to obtain the corresponding PPG signal at the distance between LED2 and PD. In this way, the electronic device 100 can obtain the PPG signals collected by the two detection modules at different distances, so as to measure the user's physiological parameters using these two PPG signals.

[0190] For example, if the physiological parameter is blood oxygen, after the electronic device 100 obtains two PPG signals, the two PPG signals can be used to calculate ratio values ​​R1 and R2 respectively, and then the above formula 5 is used to calculate the user's blood oxygen value.

[0191] exist Figure 7 On the basis of, further, the light sources included in the PPG module can be two or more. Exemplarily, Figure 8 Another structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0192] like Figure 8 As shown, the PPG module in the electronic device 100 may include a photodetector PD and n (n≥2) light sources: LED1, LED2, ..., LEDn. The n light sources may respectively form a detection module with the photodetector PD, and the distances between any two detection modules may be different.

[0193] Similar to Figure 7 According to the relevant description in , when the electronic device 100 collects PPG signals, the electronic device 100 can control different light sources to emit light at different time points, so that the electronic device 100 can collect PPG signals at different time points through PD, thereby obtaining n-channel PPG signals. In this way, the electronic device 100 can obtain the PPG signals collected by n detection modules at different intervals, thereby realizing the use of these n-channel PPG signals to measure the user's physiological parameters.

[0194] For example, if the physiological parameter is blood oxygen, after the electronic device 100 obtains n PPG signals, it can use these n PPG signals to calculate ratio values ​​R1, R2...Rn respectively, and then use the above formula 4 to calculate the user's blood oxygen value.

[0195] In addition, the multiple detection modules included in the PPG module may include detection modules with the same spacing in addition to detection modules with different spacing.

[0196] For example, Fig. 9 Another structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0197] like Fig. 9 As shown, the PPG module in the electronic device 100 may include a photodetector PD, and five light sources: LED1, LED2, LED3, LED4, and LED5. The five light sources may respectively form a detection module with the photodetector PD, and the distances between the light sources LED1, LED2, LED3, and LED4 and the photodetector PD are the same, and the distance between the light source LED5 and the photodetector PD is greater than the distance between any one of the light sources LED1, LED2, LED3, and LED4 and the photodetector PD.

[0198] Similar to Figure 7 According to the relevant description in , when the electronic device 100 collects PPG signals, the electronic device 100 can control different light sources to emit light at different time points, so that the electronic device 100 can collect PPG signals at different time points through PD, thereby obtaining 5 PPG signals. In this way, the electronic device 100 can obtain 5 detection modules and collect PPG signals at multiple intervals including the same and different intervals, so as to measure the user's physiological parameters using these 5 PPG signals.

[0199] For example, if the physiological parameter is blood oxygen, after the electronic device 100 obtains 5 PPG signals, the 5 PPG signals can be used to calculate ratio values ​​R1, R2...R5 respectively, and then the above formula 4 is used to calculate the user's blood oxygen value.

[0200] Fig.10 Another structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0201] like Fig.10 As shown, the PPG module in the electronic device 100 may include a light source LED and two photodetectors: PD1 and PD2. PD1 and LED may form a detection module, PD2 and LED may form a detection module, and the distance between PD1 and LED is smaller than the distance between PD2 and LED.

[0202] For example, when the electronic device 100 collects PPG signals, the electronic device 100 can control the LED to emit light, and collect the light reflected by the skin through PD1 and PD2 respectively, so as to obtain the PPG signal corresponding to the distance between the LED and PD1, and the PPG signal corresponding to the distance between the LED and PD2. In this way, the electronic device 100 can use the two PPG signals collected at different distances to measure the user's physiological parameters.

[0203] For example, if the physiological parameter is blood oxygen, after the electronic device 100 obtains two PPG signals, the two PPG signals can be used to calculate ratio values ​​R1 and R2 respectively, and then the above formula 5 is used to calculate the user's blood oxygen value.

[0204] exist Fig.10 On the basis of, further, the photodetectors included in the PPG module may be two or more. Exemplarily, Fig.11 Another structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0205] like Fig.11 As shown, the PPG module in the electronic device 100 may include a light source LED, and n (n≥2) photodetectors: PD1, PD2, ... PDn. The n photodetectors may respectively form a detection module with the light source LED, and the distance between any two detection modules may be different.

[0206] Similar to Fig.10 According to the relevant description in , when the electronic device 100 collects PPG signals, the electronic device 100 can control the LED to emit light, and collect the light reflected by the skin through different PDs, so as to obtain the PPG signals corresponding to the distances between the LED and the different PDs. In this way, the electronic device 100 can use the n PPG signals collected at different distances to measure the user's physiological parameters.

[0207] For example, if the physiological parameter is blood oxygen, after the electronic device 100 obtains n PPG signals, it can use these n PPG signals to calculate ratio values ​​R1, R2...Rn respectively, and then use the above formula 4 to calculate the user's blood oxygen value.

[0208] In addition, the multiple detection modules included in the PPG module may include detection modules with the same spacing in addition to detection modules with different spacing.

[0209] For example, Fig.12 Another structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0210] like Fig.12 As shown, the PPG module in the electronic device 100 may include a light source LED and five photodetectors: PD1, PD2, PD3, PD4, and PD5. The five photodetectors may respectively form a detection module with the light source LED, and the distances between the photodetectors PD1, PD2, PD3, and PD4 and the light source LED are the same, and the distance between the photodetector PD5 and the light source LED is greater than the distance between any one of the photodetectors PD1, PD2, PD3, and PD4 and the photodetector PD.

[0211] Similar to Fig.10 According to the relevant description in , when the electronic device 100 collects PPG signals, the electronic device 100 can control the LED to emit light, and collect the light reflected by the skin through different PDs, so as to obtain the PPG signals corresponding to the distances between the LED and the different PDs. In this way, the electronic device 100 can use the five detection modules to collect PPG signals at the same and different distances to measure the user's physiological parameters.

[0212] For example, if the physiological parameter is blood oxygen, after the electronic device 100 obtains 5 PPG signals, the 5 PPG signals can be used to calculate ratio values ​​R1, R2...R5 respectively, and then the above formula 4 is used to calculate the user's blood oxygen value.

[0213] It is understandable that the above Figure 7 , Figure 8 , Fig. 9 Take the PPG module containing only one photodetector as an example. Fig.10 , Fig.11 , Fig.12 Taking the example that the PPG module includes only one light source, the possible structure of the PPG module is described exemplarily. In other embodiments of the present application, the PPG module may also include more or fewer light sources and more or fewer photodetectors. For example, Fig.12 The photodetectors in the PPG module shown may include only any two of PD1, PD2, PD3, PD4, and PD5.

[0214] It should be understood that in the embodiments of the present application, as long as the light sources and photodetectors included in the PPG module can constitute at least two detection modules with different spacings, the number and positions of the light sources and photodetectors may not be restricted.

[0215] From the above Figure 7-Figure 12 It can be seen that the PPG module of the electronic device 100 may include one or more light sources and multiple photodetectors, or multiple light sources and one or more photodetectors, and the PPG module includes at least two types of detection modules with different spacings. In this way, the electronic device 100 can use the PPG signals collected by the detection modules with different spacings to accurately measure the user's physiological parameters.

[0216] In the above Figure 4 In the method flow shown, the electronic device 100 can use n PPG signals collected by n detection modules to determine a physiological parameter value, and use the physiological parameter value as the physiological parameter value of the user.

[0217] Further, Figure 4The n detection modules shown can be regarded as a group of detection modules. If the PPG module in the electronic device 100 includes m (m≥2) groups of detection modules, each group of detection modules can include one or more detection modules. For each group of detection modules, the electronic device 100 can use one or more PPG signals in the group to determine a physiological parameter value. In this way, for m groups of detection modules, the electronic device 100 can obtain m physiological parameter values.

[0218] Among them, these m physiological parameter values ​​can be regarded as intermediate values. The electronic device 100 can further use these m physiological parameter values ​​to perform a certain fusion to finally determine the physiological parameter value of the user, thereby improving the stability and accuracy of the physiological parameter measurement.

[0219] For example, Fig.13 A flowchart of another physiological parameter detection method provided in an embodiment of the present application.

[0220] S301. The electronic device 100 collects m groups of PPG signals through m groups of detection modules in the PPG module; wherein each group of PPG signals includes one PPG signal collected by each detection module in a group of detection modules.

[0221] That is to say, if a group of detection modules includes x detection modules, then a group of PPG signals collected by this group of detection modules includes x PPG signals.

[0222] The electronic device 100 may refer to a wearable device worn on a user, such as a watch, a bracelet, a ring, etc.

[0223] The electronic device 100 may include a PPG module, which may refer to the above-mentioned Figure 3A PPG module 193 mentioned in.

[0224] Among them, the PPG module can include m (m≥2) groups of detection modules, each group of detection modules includes one or more detection modules, each detection module can include a light source and a photodetector, and the photodetector in this detection module can be used to collect a PPG signal corresponding to the light source in this detection module.

[0225] It is understandable that the number of detection modules included in different groups of detection modules may be different. For example, the PPG module may include a first group of detection modules and a second group of detection modules, the first group of detection modules may include one detection module, and the second group of detection modules may include two detection modules.

[0226] Exemplarily, among the m groups of detection modules, there is a group of detection modules that includes at least two types of detection modules with different spacings. There may be one or more detection modules with each spacing. The spacing of a detection module refers to the distance between the light source and the photodetector in the detection module. In this case, among the m groups of PPG signals collected by the electronic device 100, there is a group of PPG signals (e.g., the first group of PPG signals) that includes at least two PPG signals collected by detection modules with different spacings.

[0227] In this way, the electronic device 100 can collect a set of PPG signals, including at least two PPG signals with different compositions. The composition can refer to the proportions corresponding to different depths of tissue. This enables the electronic device 100 to calculate a physiological parameter value using a set of PPG signals, and can use PPG signals corresponding to different intervals to eliminate or reduce interference signals corresponding to shallow tissues, so that the calculated physiological parameter value is more accurate.

[0228] It is understandable that the number and layout of light sources and photodetectors in different groups of detection modules may be the same or different. For example, the light sources and photodetectors in the first group of detection modules may be as follows: Figure 7 The light source and photodetector included in the PPG module shown, the light source and photodetector in the second light source-photodetector group can be as follows Fig.12 The light source and photodetector included in the PPG module shown.

[0229] In some embodiments, among the m groups of detection modules, the devices between the groups can be independent of each other, or the devices can be reused between the groups. Then, if there are two groups of detection module reused devices among the m groups of detection modules, the two groups of detection modules can include at least the same light source and / or at least the same photodetector. Among them, the reuse of devices in the detection modules between different groups helps to save costs and power consumption.

[0230] In addition, illustratively, the electronic device 100 may trigger the execution of step S301 after detecting the user operation of measuring the physiological parameters of the user, or the electronic device 100 may trigger the execution of step S301 when a preset condition is met, such as reaching a preset time, detecting that the user is in a stationary state, etc. The embodiment of the present application does not limit the timing of the electronic device 100 triggering the execution of step S301. For specific descriptions of the triggering of the electronic device 100 to execute step S301, please refer to the relevant content in the aforementioned step S101, which will not be repeated here.

[0231] S302. The electronic device 100 determines m physiological parameter values ​​based on the m groups of PPG signals, each physiological parameter value being determined according to a group of PPG signals.

[0232] For m groups of PPG signals, the electronic device 100 may determine a physiological parameter value for each group of PPG signals, thereby obtaining m physiological parameter values.

[0233] If a group of PPG signals includes only one PPG signal, the electronic device 100 can determine a physiological parameter value using the one PPG signal.

[0234] For example, if the physiological parameter is blood oxygen, the electronic device 100 can use the above formula 2 and formula 3 to determine a physiological parameter value using one PPG signal.

[0235] It should be understood that the method in which the electronic device 100 uses a PPG signal to calculate the physiological parameter value may be the same as the method in the prior art of using a PPG signal to calculate the user's physiological parameters, which will not be repeated here.

[0236] If a group of PPG signals includes multiple PPG signals, the electronic device 100 can use the multiple PPG signals to determine a physiological parameter value.

[0237] In a specific implementation, the electronic device 100 can use the PPG signal corresponding to the short spacing contained in the multiple PPG signals to remove the interference signal of the shallow tissue contained in the PPG signal corresponding to the long spacing, thereby using the processed long spacing PPG signal to determine the physiological parameter value.

[0238] For example, if the physiological parameter value is blood oxygen, the electronic device 100 may use the above formula 2 and formula 4 to determine a physiological parameter value using multiple PPG signals.

[0239] If a set of detection modules includes multiple detection modules, the specific process of collecting PPG signals by the multiple detection modules, the process of determining the physiological parameter value using the multiple PPG signals, and the physical layout of the multiple detection modules can be referred to above. Figure 4-Figure 12 The content will not be repeated here.

[0240] It should be noted that when the electronic device 100 collects PPG signals through m groups of detection modules, the electronic device 100 can start the m groups of detection modules to collect m groups of PPG signals at the same time, or start different groups of detection modules to collect PPG signals at different time points, which can be determined by the layout of the light sources and photodetectors of each group of detection modules in the m groups of detection modules. For details on how the electronic device 100 starts the m groups of detection modules, please refer to the subsequent Figure 14-Figure 20 The relevant content in the listed PPG module will not be expanded here.

[0241] It can be understood that the embodiment of the present application does not limit the execution order of step S301 and step S302. The electronic device 100 can first execute step S301 and then execute step S302. That is, the electronic device 100 can calculate the physiological parameter value corresponding to each group after collecting m groups of PPG signals. Alternatively, the electronic device 100 can execute steps S301 and S302 at the same time. That is, the electronic device 100 can calculate the physiological parameter value while collecting the PPG signal. In this case, it is only necessary to ensure that after one group of detection modules has collected the PPG signal of this group, the physiological parameter value corresponding to this group of detection modules can be calculated.

[0242] S303. The electronic device 100 determines a physiological parameter value of the user based on the m physiological parameter values, where the physiological parameter is related to the arterial activity of the user.

[0243] For example, the electronic device 100 may use a fusion algorithm on the m physiological parameter values ​​to calculate the physiological parameter value of the user, wherein the fusion algorithm may refer to taking the maximum value, minimum value, average value, median, mode, etc.

[0244] That is to say, the physiological parameter value of the user may refer to the maximum value, minimum value, average value, median value, and mode value of the m physiological parameter values.

[0245] Taking the physiological parameter of blood oxygen as an example, assuming that the electronic device 100 uses m groups of detection modules to calculate m blood oxygen values: SpO2_1, SpO2_2...SpO2_m. Among them, a blood oxygen value is calculated based on a group of PPG signals collected by a group of detection modules in the m groups of detection modules. If the fusion algorithm adopts the average value, the user's blood oxygen value = (SpO2_1+SpO2_2+...+SpO2_m) / m.

[0246] This is because when the user actually wears the electronic device 100, various factors may cause the signal quality of the PPG signal collected by the part where the PPG module is located to be poor. For example, if the user does not wear the device properly, some areas of the PPG module may not fit the skin, resulting in poor signal quality of the PPG signal collected by the detection module in the area. Then, using the PPG signal with poor signal quality to directly calculate the user's physiological parameters may cause errors in the calculation results, affecting the user's assessment of his or her own physical condition.

[0247] Therefore, using multiple groups of detection modules to collect multiple groups of PPG signals, and then using multiple physiological parameter values ​​calculated by the multiple groups of PPG signals to comprehensively calculate the user's final physiological parameter values, can minimize the impact of the wearing position of the PPG module on the accuracy of physiological parameter measurement, and improve the accuracy and stability of physiological parameter measurement.

[0248] Combine the following Figure 14-Figure 20 The structure of the PPG module involved in the embodiments of the present application is introduced.

[0249] Fig.14 Another structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0250] like Fig.14 As shown, the PPG module in the electronic device 100 may include m (m≥2) groups of detection modules: a first group of detection modules, a second group of detection modules, ... an mth group of detection modules. Among them, a group of detection modules may include: a photodetector PD, and n (n≥2) light sources: LED1, LED2, ... LEDn. Among them, these n light sources can each form a detection module with the photodetector PD, and the distance between any two detection modules can be different.

[0251] Then, when collecting PPG signals, the electronic device 100 can first start the first group of detection modules, collect n PPG signals through the first group of detection modules, then start the second group of detection modules, collect n PPG signals through the second group of detection modules, and so on, and finally start the mth group of detection modules, and collect n PPG signals through the mth group of detection modules. When the electronic device 100 measures physiological parameters, the electronic device 100 can calculate the first physiological parameter value based on the n PPG signals collected by the first group of detection modules, calculate the second physiological parameter value based on the n PPG signals collected by the second group of light sources-photodetectors... and calculate the mth physiological parameter value based on the n PPG signals collected by the mth group of light sources-photodetectors. Finally, the final physiological parameter value of the user is calculated for these m physiological parameter values ​​using a fusion algorithm.

[0252] For details about the working process of each light source and photodetector in each group of detection modules, please refer to the above Figure 8 The relevant content will not be repeated here.

[0253] Understandably, Fig.14 In the PPG module shown, each group of detection modules is arranged in a horizontal order. In other embodiments of the present application, each group of detection modules can also present other layouts. For example, assuming that m is 4, the four groups of detection modules can be arranged in the order of Fig.15 In addition, Fig.14 When the PPG module shown in the figure collects the PPG signal, each group of detection modules can also be started at the same time to collect the PPG signal. The embodiment of the present application does not limit the execution order of the multiple groups of detection modules in the PPG module. Figure 15-Figure 20 The PPG module shown is similar and will not be described in detail below.

[0254] Fig.16 Another structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0255] like Fig.16 As shown, the PPG module in the electronic device 100 may include m (m≥2) groups of detection modules: a first group of detection modules, a second group of detection modules... an mth group of detection modules. Among them, a group of detection modules may include: a light source LED, and n (n≥2) photodetectors: PD1, PD2... PDn. Among them, these n photodetectors can each form a detection module with the light source LED, and the distance between any two detection modules can be different.

[0256] Specifically, the electronic device 100 Fig.16 The description of the m groups of detection modules in the PPG module shown in the figure for measuring physiological parameters can be found in the above Fig.14 For details about the working process of each light source and photodetector in each detection module, please refer to the above Fig.11 The relevant content will not be repeated here.

[0257] Understandably, Fig.16 In the PPG module shown, each group of detection modules is arranged in a horizontal order. In other embodiments of the present application, each group of detection modules can also present other layouts. For example, assuming that m is 4, the four groups of detection modules can be arranged in the order of Fig.17 Specific about Fig.17 In the PPG module shown, the working process of each light source and photodetector in any group of detection modules can be referred to the aforementioned Fig.11 The description is not repeated here.

[0258] From the above Figure 14-17 It can be seen from the PPG module shown that when the PPG module includes multiple groups of light source-photodetectors, the devices included in each group of light source-photodetectors are independent of each other.

[0259] In some embodiments, when the PPG module includes multiple groups of detection modules, devices between groups can be reused, which helps save cost and power consumption.

[0260] Fig.18 Another structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0261] like Fig.18As shown, the PPG module in the electronic device 100 may include 4 groups of detection modules, each group of detection modules includes a light source LED and n photodetectors, and these n photodetectors can respectively form a detection module with the light source LED. It can be seen that these 4 groups of detection modules share one light source.

[0262] In this way, when the electronic device 100 measures physiological parameters, the electronic device 100 can start the light source LED to emit light, and then collect the light reflected back through the skin through the photodetectors in each group of light source-photodetectors, thereby obtaining 4 groups of n-channel PPG signals, and then use these 4 groups of n-channel PPG signals to calculate 4 physiological parameter values, and finally use the fusion algorithm to calculate the user's final physiological parameter value.

[0263] exist Fig.18 In the PPG module shown, each group of detection modules can be started at the same time, so as to quickly obtain the PPG signals corresponding to each group of detection modules, thereby speeding up the speed of measuring physiological parameters by the electronic device 100.

[0264] Specific about Fig.18 In the PPG module shown, the working process of each light source and photodetector in any group of detection modules can be referred to the aforementioned Fig.11 The description is not repeated here.

[0265] Fig.19 Another structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0266] like Fig.19 As shown, the PPG module in the electronic device 100 may include four light sources: LED1, LED2, LED3, LED4, and three photodetectors: PD1, PD2, PD3.

[0267] Exemplarily, these multiple light sources and photodetectors can constitute three groups of detection modules, wherein the first group of detection modules may include: a detection module composed of LED4 and PD1, and a detection module composed of LED2 and PD1; the second group of detection modules may include: a detection module composed of LED1 and PD2, and a detection module composed of LED2 and PD2; the third group of detection modules may include: a detection module composed of LED3 and PD3, and a detection module composed of LED2 and PD3.

[0268] It can be seen that in Fig.19 In the PPG module shown, LED2 is a device reused by each group of detection modules.

[0269] For example, when the electronic device 100 collects PPG signals, the electronic device 100 can first start LED2, and collect the PPG signal corresponding to LED2 through PD1, PD2, and PD3, and then respectively start LED1, LED3, and LED4 at different time points, and collect the PPG signal corresponding to LED1 through PD2, collect the PPG signal corresponding to LED3 through PD3, and collect the PPG signal corresponding to LED4 through PD1. In this way, the electronic device 100 can collect two PPG signals corresponding to each group of detection modules, and then the electronic device 100 can use the two PPG signals of each group of detection modules to calculate the physiological parameter value corresponding to each group, and finally use the fusion algorithm to calculate the final physiological parameter value of the user according to the three physiological parameter values ​​corresponding to the three groups of detection modules.

[0270] It is understandable that, in addition to the above Fig.19 In addition to dividing the detection modules into groups in the combination manner shown, the detection modules included in each group may also be arranged according to other division manners. For example, the second group of detection modules may also include: a detection module composed of LED1 and PD1.

[0271] Fig. 20 Another structural schematic diagram of the PPG module provided in an embodiment of the present application.

[0272] like Fig. 20 As shown, the PPG module in the electronic device 100 may include six light sources: LED1, LED2, LED3, LED4, LED5, LED6 and six photodetectors: PD1, PD2, PD3, PD4, PD5, PD6.

[0273] Exemplarily, the multiple light sources and photodetectors may constitute multiple groups of detection modules, wherein each group of detection modules may include at least two detection modules. Fig. 20 The dashed area shown in the figure exemplarily shows a light source and a photodetector included in a set of detection modules, such as Fig. 20 As shown, in this set of detection modules, there are two light sources: LED1 and LED5, and a photodetector PD5. In addition, the light source LED1 and the photodetector PD5 constitute a detection module, and the light source LED5 and the photodetector PD5 constitute a detection module.

[0274] Understandably, Fig. 20 The number of detection modules included in the PPG module shown, and the number of light sources and photodetectors included in each detection module group may exist in many possibilities. Fig. 20 There is no limit on the number of detection module groups included in the PPG module shown, and the number of light sources and photodetectors included in each detection module group.

[0275] In addition, it should be noted that Figure 14-Figure 20 These are merely illustrative examples and do not constitute limitations on the embodiments of the present application.

[0276] In addition, it should be noted that Figure 14-Figure 20 The PPG module shown is used in addition to Fig.13 In addition to the physiological parameter detection method shown, it can also be applied to Figure 4 The physiological parameter detection method shown, that is, Figure 14-Figure 20 In the PPG module shown, the electronic device 100 may use only the physiological parameter values ​​calculated by one group of detection modules as the physiological parameter values ​​of the user, or, Figure 14-Figure 20 In the PPG module shown, multiple groups of light source-photodetectors can be combined into one group. In this way, after the electronic device 100 obtains the PPG signal collected by each detection module in the PPG module, all the collected PPG signals can be directly used to calculate the user's physiological parameters.

[0277] In addition, it should be noted that Figure 8 , Fig. 9 , Fig.11 , Fig.12 In addition to being applied to Figure 4 The physiological parameter detection method shown can also be applied to Fig.13 The physiological parameter detection method shown.

[0278] by Fig. 9 Taking the PPG module shown as an example, the PPG module can be divided into four groups of detection modules, wherein the first three groups of detection modules can be composed of: LED1 and PD, LED2 and PD, LED3 and PD, respectively, and the last group of detection modules can be composed of: LED4, LED5 and PD.

[0279] That is to say, the first three groups of light source-photodetector can each include only one detection module, and the last group of detection modules can include two detection modules. The electronic device 100 can collect one PPG signal through LED1 and PD, and then use the PPG signal to calculate a physiological parameter value. Similarly, collect one PPG signal through LED2 and PD, and then use the PPG signal to calculate a physiological parameter value. Collect one PPG signal through LED3 and PD, and then use the PPG signal to calculate a physiological parameter value. Collect two PPG signals through LED4, LED5 and PD, and then use the two PPG signals to calculate a physiological parameter value. Finally, use the fusion algorithm to calculate the user's physiological parameter value based on these four physiological parameter values.

[0280] Furthermore, considering that the power consumption of the electronic device 100 is relatively large when multiple detection modules are started at one time to measure the user's physiological parameters, when starting to measure the user's physiological parameters, the electronic device 100 may only start one detection module to measure the user's physiological parameters. When it is determined that the measurement effect is not good, the physiological parameter detection method provided in the embodiment of the present application is applied, and multiple detection modules or multiple groups of detection modules are used to measure the user's physiological parameters, thereby effectively reducing the power consumption of the electronic device 100.

[0281] Fig.21 A flowchart of another physiological parameter detection method provided in an embodiment of the present application.

[0282] S401. The electronic device 100 collects a first PPG signal through a detection module in the PPG module.

[0283] The electronic device 100 may include a PPG module, which may include at least two detection modules, and the distances between the two detection modules are different. Among them, a detection module may include a light source and a photodetector, and the distance between a detection module may refer to the distance between the light source and the photodetector in the detection module.

[0284] In addition, illustratively, the electronic device 100 may trigger the execution of step S401 after detecting the user operation of measuring the physiological parameters of the user, or the electronic device 100 may trigger the execution of step S401 when a preset condition is met, such as reaching a preset time, detecting that the user is in a stationary state, etc. The embodiment of the present application does not limit the timing of the electronic device 100 triggering the execution of step S401. For specific descriptions of the triggering of the electronic device 100 to execute step S401, please refer to the relevant content in the aforementioned step S101, which will not be repeated here.

[0285] For the detailed implementation process of the electronic device 100 collecting the first PPG signal through a detection module, reference may be made to the detailed process of the electronic device 100 collecting one PPG signal through a detection module in the above step S101, which will not be repeated here.

[0286] S402. The electronic device 100 determines whether a preset condition is met.

[0287] Among them, if the preset conditions are met, step S403 is executed, that is, the electronic device 100 determines the physiological parameter value determined based on the first PPG signal as the physiological parameter value of the user; otherwise, step S404 is executed, that is, the electronic device 100 continues to collect PPG signals through another detection module in the PPG module, and determines the physiological parameter value of the user based on the PPG signal that continues to be collected.

[0288] Exemplarily, the preset condition may include any one or more of the following:

[0289] 1) The physiological parameter value reflected by the first PPG signal is normal

[0290] Among them, the physiological parameter value reflected by the first PPG signal is normal may mean that the physiological parameter value reflected by the first PPG signal is within a normal range.

[0291] For example, if the physiological parameter detected by the electronic device 100 is blood oxygen, the preset condition may refer to a blood oxygen value ≥ 95%.

[0292] That is to say, if the electronic device 100 uses one detection module and detects that the user's physiological parameter value is within the normal range, it can be considered that the physiological indicator value detected by the current detection module can be used to reflect the current user's physiological parameter situation. If the electronic device 100 uses one detection module and detects that the user's physiological parameter value is not within the normal range, it is considered that there may be a false detection, and PPG signals collected by multiple pairs of detection modules can be further used to achieve more accurate physiological parameter measurement.

[0293] 2) Detecting a user operation in which the user agrees to use the physiological parameter value reflected by the first PPG signal as the user's physiological parameter value

[0294] For example, after determining the physiological parameter value reflected by the first PPG signal, the electronic device 100 can display the physiological parameter value and prompt the user whether to use the physiological parameter value as the user's physiological parameter value. If the electronic device 100 detects that the user agrees to use the physiological parameter value as the user's physiological parameter value, the electronic device 100 can execute step S403; otherwise, the electronic device 100 can execute step S404.

[0295] 3) The pulse reflected by the first PPG signal is complete

[0296] If the electronic device 100 can clearly identify the user's pulse based on the first PPG signal, it means that the signal quality of the first PPG signal collected by the electronic device 100 is good. Then, the first physiological parameter value determined by the third PPG signal can be used to reflect the user's actual situation. Therefore, the electronic device 100 can execute step S403.

[0297] If the electronic device 100 fails to clearly identify the user's pulse based on the first PPG signal, it means that the signal quality of the first PPG signal collected by the electronic device 100 is poor. Then, the physiological parameter value determined using the first PPG signal cannot be used to reflect the user's actual situation. Therefore, the electronic device 100 can execute step S404.

[0298] It can be understood that the preset condition may also include other situations. As long as the preset condition can reflect the effect of measuring physiological parameters using the first PPG signal, it should fall within the protection scope of the present application. The embodiment of the present application does not limit the preset condition.

[0299] It should be noted that the physiological parameter value reflected by the first PPG signal can be calculated by the electronic device 100 according to the first PPG signal, and the calculation method can use the method of determining the physiological parameter value based on one PPG signal in the prior art, which is not limited here. For example, if the physiological parameter is blood oxygen, the electronic device 100 can calculate the ratio value R according to the first PPG signal, and then calculate the physiological parameter value using the above formula 3.

[0300] S403. The electronic device 100 determines the physiological parameter value determined based on the first PPG signal as the physiological parameter value of the user.

[0301] If the electronic device 100 determines that the preset conditions are met, the electronic device 100 can directly determine the physiological parameter value determined by the PPG signal collected by one detection module as the physiological parameter value of the user. In this way, the step of the electronic device 100 starting multiple pairs of detection modules to detect the user's physiological parameters can be reduced, thereby reducing the power consumption of the electronic device 100.

[0302] S404. The electronic device 100 collects a second PPG signal through another detection module in the PPG module, and the distance between the detection module collecting the first PPG signal and the detection module collecting the second PPG signal is different.

[0303] If the electronic device 100 determines that the preset condition is not met, the electronic device 100 may continue to start another detection module in the PPG module to continue collecting the PPG signal.

[0304] Furthermore, the distance between the detection modules started in step S404 and the detection modules started in step S401 is different, so that the signal ratios corresponding to different tissue depths in the first PPG signal and the second PPG signal can be different.

[0305] It is understandable that the PPG module in the electronic device 100 may include other detection modules in addition to the detection modules mentioned in step S401 and step S402. The embodiment of the present application does not limit the number of detection modules included in the PPG module of the electronic device 100.

[0306] S405. The electronic device 100 determines a physiological parameter value of the user based on the first PPG signal and the second PPG signal.

[0307] Among them, the electronic device 100 can use the PPG signal corresponding to the short spacing in the first PPG signal and the second PPG signal to eliminate or reduce the signal corresponding to the shallow tissue in the PPG signal corresponding to the long spacing, and then use the processed PPG signal corresponding to the long spacing to determine the user's physiological parameter value.

[0308] For example, assuming that the physiological parameter is blood oxygen, the electronic device 100 can determine a ratio value R based on the first PPG signal and the second PPG signal, respectively, and then input the two ratio values ​​R into the multi-interval blood oxygen model to obtain the user's physiological parameter value. For a specific description of the multi-interval blood oxygen model, please refer to the relevant content of the aforementioned formula 5, which will not be repeated here.

[0309] It is understandable that, in steps S403-S405, when the electronic device 100 does not meet the preset condition, the number of detection modules started again is one as an example. In other embodiments of the present application, when the electronic device 100 determines that the preset condition is not met, the detection modules started by the electronic device 100 may include L (L≥1). The spacings of the L detection modules may be the same, different, or partially the same.

[0310] In this way, when the electronic device 100 starts the detection module again, the collected PPG signals may include L channels, and then the electronic device 100 can use the L channels of PPG signals and the first PPG signal to determine the physiological parameter values ​​of the user. For a detailed process of the electronic device 100 using the L+1 channels of PPG signals to determine the physiological parameter values ​​of the user, please refer to the aforementioned Figure 4-Figure 6 The content will not be repeated here.

[0311] Furthermore, the L+1 PPG signals can also be split into multiple groups of PPG signals. In this way, the electronic device 100 can calculate multiple physiological parameter values, and then use a fusion algorithm to determine the physiological parameter value of the user.

[0312] For details about the process of the electronic device 100 using multiple groups of PPG signals to determine the user's physiological parameter values, please refer to the aforementioned Fig.13 The content will not be repeated here.

[0313] It can be seen from steps S401-S405 that the electronic device 100 can split the collection operation of the PPG signal by multiple detection modules. The electronic device 100 does not need to start multiple detection modules to collect PPG signals every time it measures physiological parameters. Instead, it first starts one detection module and uses the PPG signal collected by the detection module to measure the user's physiological parameter value. If the measurement effect is not good, the remaining detection modules are started and the PPG signals collected by all the detection modules are used to determine the user's physiological parameter value. In this way, the power consumption of the electronic device 100 can be reduced as much as possible while ensuring the accuracy of physiological parameter detection.

[0314] In the above steps S401-S405, the electronic device 100 may first collect one PPG signal. If the electronic device 100 determines that the preset condition is not met, the electronic device 100 may collect one or more PPG signals again, and then use the one or more PPG signals collected again and the one PPG signal collected initially to determine the user's physiological parameter value. In the following embodiments, the electronic device 100 may collect multiple PPG signals again when it is determined that the preset condition is not met, and only use the multiple PPG signals collected again to determine the user's physiological parameter value, and no longer use the one PPG signal collected initially to determine the user's physiological parameter value.

[0315] Fig. 22 A flowchart of another physiological parameter detection method provided in an embodiment of the present application.

[0316] S501. The electronic device 100 collects a first PPG signal through a detection module in the PPG module.

[0317] S502. The electronic device 100 determines whether a preset condition is met.

[0318] If the preset condition is met, step S503 is executed; otherwise, step S504 is executed.

[0319] S503. The electronic device 100 determines the physiological parameter value determined based on the first PPG signal as the physiological parameter value of the user.

[0320] If the electronic device 100 determines that the preset conditions are met, the electronic device 100 can directly determine the physiological parameter value determined by the PPG signal collected by one detection module as the physiological parameter value of the user. In this way, the steps of starting multiple detection modules of the electronic device 100 to detect the physiological parameters of the user can be reduced, thereby reducing the power consumption of the electronic device 100.

[0321] For the detailed description of steps S501-S503, please refer to the relevant contents in the above steps S401-S403, which will not be repeated here.

[0322] S504. The electronic device 100 determines the physiological parameter values ​​of the user through multiple detection modules in the PPG module, and the multiple detection modules include at least two types of detection modules with different spacings.

[0323] If the electronic device 100 determines that the preset condition is not met, the electronic device 100 can activate multiple detection modules in the PPG module and use the PPG signals collected by the multiple detection modules to determine the physiological parameter values ​​of the user.

[0324] The electronic device 100 can determine the physiological parameter value of the user through multiple detection modules in the following two ways:

[0325] 1) The electronic device 100 can obtain the PPG signals collected by the multiple detection modules respectively, and then determine the user's physiological parameter value based on the PPG signal collected by each detection module

[0326] Specifically, the electronic device 100 can use the PPG signal corresponding to the short spacing in the collected multi-channel PPG signals to eliminate or reduce the interference signal of the shallow tissue contained in the PPG signal corresponding to the long spacing, and then use the PPG signal after eliminating or reducing the interference signal to determine the user's physiological parameter value.

[0327] For details about the process of the electronic device 100 using the multi-channel PPG signal to determine the physiological parameter value of the user, please refer to the aforementioned Figure 4-Figure 6 The content will not be repeated here.

[0328] 2) The multiple detection modules can be divided into m groups of detection modules, wherein each group of detection modules can include one or more detection modules, and the electronic device 100 can use each group of detection modules to determine a physiological parameter value, and then determine the user's physiological parameter value based on the multiple physiological parameter values.

[0329] The electronic device 100 may use a fusion algorithm on the multiple physiological parameter values, and the obtained physiological parameter value is the physiological parameter value of the user.

[0330] For details about the process of the electronic device 100 using multiple detection modules to determine the physiological parameter values ​​of the user, please refer to the aforementioned Fig.13 The content will not be repeated here.

[0331] It is understandable that the detection module mentioned in step S501 may be one of the multiple detection modules mentioned in step S504, or may be different from any one of the multiple detection modules mentioned in step S504. In addition, the multiple detection modules mentioned in step S504 may be all or part of the detection modules in the PPG module of the electronic device 100.

[0332] It can be seen from steps S501-S504 that when the electronic device 100 starts physiological parameter detection, it can preferentially use only one detection module to measure the user's physiological parameters to minimize the power consumption of the electronic device 100. If the measurement result is abnormal, the electronic device 100 will start multiple detection modules or multiple groups of detection modules to measure the user's physiological parameters to ensure the accuracy of the physiological parameter measurement as much as possible.

[0333] It should be noted that Fig.21 and Fig. 22 In all of the above, the electronic device 100 preferentially uses the PPG signal collected by only one detection module to calculate the physiological parameters, and then uses the PPG signals collected by multiple detection modules to calculate the physiological parameters. In other embodiments of the present application, the electronic device 100 may also first start some detection modules in the PPG module, and use the multi-channel PPG signals collected by these detection modules to measure the physiological parameters. When the measurement effect is not good, one or more detection modules in the PPG module are started again, and the PPG signals collected by multiple detection modules are used to calculate the physiological parameters. Among them, the detection module started again may be part or all of the detection modules in the PPG module. That is to say, the above step S401 or step S501 may also be replaced by the electronic device 100 collecting PPG signals through multiple detection modules in the PPG module to obtain multi-channel PPG signals. Among them, the spacing between these multiple detection modules may be the same or different. It should be understood that the embodiments of the present application are for Fig.21 and Fig. 22 In the illustrated embodiment, there is no limit on the number of detection modules that are first activated by the electronic device 100.

[0334] Fig.23 This is a schematic diagram of the structure of a physiological parameter detection device 200 provided in an embodiment of the present application.

[0335] like Fig.23 As shown, the physiological parameter detection device 200 may include: a processor 201, a memory 202 and other components. These components may be connected via a bus 203 or other means. Fig.23 Taking the connection through a bus as an example, the bus 203 is used to realize the connection and communication between the processor 201 and the memory 202 .

[0336] In addition, the physiological parameter detection device 200 may also include a PPG module, which may include n (n≥2) detection modules or m (m≥2) groups of detection modules, a group of detection modules includes one or more detection modules, and a detection module includes a light source and a photodetector.

[0337] The processor 201 may include one or more processing units. The processor 201 may be used to provide computing and control capabilities to support the operation of the entire physiological parameter detection device 200.

[0338] The memory 202 may be used to store various software programs and / or multiple sets of instructions. Specifically, the memory 202 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices.

[0339] In the embodiment of the present application, the physiological parameter detection device 200 may be the electronic device 100 described above. The processor 201 may be used to control the n detection modules in the PPG module to collect n PPG signals, and determine the physiological parameter values ​​of the user based on the n PPG signals, or the processor 201 may be used to control the m detection modules in the PPG module to collect m groups of PPG signals, where a group of PPG signals includes one or more PPG signals, and m physiological parameter values ​​are determined based on the m groups of PPG signals, and the physiological parameter values ​​of the user are determined based on the m physiological parameter values. The memory 202 may be used to store the PPG signals collected by the PPG module and the calculated physiological parameter values.

[0340] It should be noted that Fig.23 The physiological parameter detection device 200 shown is only one implementation of the embodiment of the present application. In actual applications, the physiological parameter detection device 200 may include more or fewer components than shown in the figure, or combine certain components, or deploy different components, which is not limited here.

[0341] It should be understood that each step in the above method embodiment can be completed by an integrated logic circuit of hardware in a processor or by instructions in the form of software. The method steps disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware processor, or by a combination of hardware and software modules in a processor.

[0342] The present application also provides an electronic device, which may include: a PPG module, a memory and a processor. The memory may be used to store a computer program; the PPG module includes n (n≥2) detection modules, each detection module includes a light source and a photodetector, and the processor may be used to call the computer program in the memory so that the electronic device executes the method executed by the electronic device 100 in any of the above embodiments.

[0343] The present application also provides an electronic device, which may include: a PPG module, a memory and a processor. The memory may be used to store a computer program; the PPG module includes m (m≥2) groups of detection modules, each group of detection modules includes one or more detection modules, each detection module includes a light source and a photodetector, and the processor may be used to call the computer program in the memory so that the electronic device executes the method executed by the electronic device 100 in any of the above embodiments.

[0344] The present application also provides a chip system, which includes at least one processor for implementing the functions involved in the method performed by the electronic device 100 in any of the above embodiments.

[0345] In one possible design, the chip system also includes a memory, which is used to store program instructions and data, and the memory is located inside or outside the processor.

[0346] The chip system may be composed of the chip, or may include the chip and other discrete devices.

[0347] Optionally, the processor in the chip system may be one or more. The processor may be implemented by hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc. When implemented by software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

[0348] Optionally, the memory in the chip system may also be one or more. The memory may be integrated with the processor or may be separately arranged with the processor, which is not limited in the embodiments of the present application. Exemplarily, 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 may be arranged on different chips respectively. The embodiments of the present application do not specifically limit the type of memory and the arrangement of the memory and the processor.

[0349] Exemplarily, the chip system can 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.

[0350] The present application also provides a computer program product, which includes: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute a method executed by any one of the electronic devices 100 in any of the above embodiments.

[0351] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program (also referred to as code or instruction). When the computer program is executed, the computer executes any method executed by the electronic device 100 in any of the above embodiments.

[0352] It should be understood that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (digitalsignal processor, DSP), an application specific integrated circuit (AP 800plication specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined to perform. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0353] In addition, an embodiment of the present application further provides a device. The device may be a component or a module, and the device may include one or more processors and a memory connected to each other. The memory is used to store a computer program. When the computer program is executed by one or more processors, the device executes the method in each of the above method embodiments.

[0354] Among them, the device, computer-readable storage medium, computer program product or chip provided in the embodiments of the present application are used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above, and will not be repeated here.

[0355] The various implementation modes of the present application can be combined arbitrarily to achieve different technical effects.

[0356] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part 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, the process or function described in the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can 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. The available medium can 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 disk (SSD)), etc.

[0357] Those skilled in the art can understand that to implement all or part of the processes in the above-mentioned embodiments, the processes can be completed by computer programs to instruct related hardware, and the programs can be stored in computer-readable storage media. When the programs are executed, they can include the processes of the above-mentioned method embodiments. The aforementioned storage media include: ROM or random access memory RAM, magnetic disk or optical disk and other media that can store program codes.

[0358] In short, the above is only an embodiment of the technical solution of this application, and is not intended to limit the protection scope of this application. Any modification, equivalent replacement, improvement, etc. made according to the disclosure of this application shall be included in the protection scope of this application.

Claims

1. A physiological parameter detection method, characterized in that: The method is applied to an electronic device including a photoplethysmography (PPG) module, wherein the PPG module includes n (n≥2) detection modules, each of which includes a light source and a photodetector. The method includes: n PPG signals are collected by the n detection modules; wherein each PPG signal is obtained by a light source in a detection module emitting light toward the skin, and a photodetector in the detection module detecting the light reflected by the skin, and the n PPG signals include at least two signals collected by detection modules with different spacings, and the spacing of a detection module refers to the distance between the light source and the photodetector in the detection module; A physiological parameter value of the user is determined based on the n-channel PPG signals, where the physiological parameter value is related to the arterial activity of the user.

2. The method according to claim 1, characterized in that Before collecting n PPG signals by the n detection modules, the method further includes: Collecting a first PPG signal through one of the n detection modules; Collecting n PPG signals through the n detection modules specifically includes: When the physiological parameter value reflected by the first PPG signal is abnormal, or the pulse reflected by the first PPG signal is incomplete, n PPG signals are collected by the n detection modules.

3. The method according to claim 2, characterized in that Determining a physiological parameter value based on the n-channel PPG signals specifically includes: A physiological parameter value is determined based on the n PPG signals and the first PPG signal.

4. The method according to any one of claims 1 to 3, characterized in that: The physiological parameter value is a blood oxygen value, and in any one of the detection modules in the PPG module, the light emitted by the light source includes light of at least two wavelengths; Determining the physiological parameter value of the user based on the n-channel PPG signals specifically includes: Calculating a ratio value R for each of the n PPG signals, where the ratio value R is used to reflect the ratio of the absorption rates of light of different wavelengths in the PPG signal; The user's blood oxygen value is determined based on the n ratio values ​​R corresponding to the n PPG signals.

5. The method according to claim 4, characterized in that Based on the n ratio values ​​R corresponding to the n PPG signals, the user's blood oxygen value is determined: Inputting the n ratio values ​​R corresponding to the n PPG signals into a first blood oxygen model to obtain the blood oxygen value of the user; The first blood oxygen model is used to characterize the mathematical relationship between multiple ratio values ​​and blood oxygen. The first blood oxygen model is determined based on multiple sets of data sets, wherein one set of data sets includes the blood oxygen value of the test person and k ratio values ​​R calculated using PPG signals collected from the measured person using k (k≥1) detection modules.

6. A physiological parameter detection method, characterized in that: The method is applied to an electronic device including a PPG module, wherein the PPG module includes m (m≥2) groups of detection modules, each group of detection modules includes one or more detection modules, and each detection module includes a light source and a photodetector. The method includes: m groups of PPG signals are collected by the m groups of detection modules; wherein each group of PPG signals includes one PPG signal collected by each detection module in a group of detection modules, one PPG signal is obtained by a light source in one detection module emitting light toward the skin, and a photodetector in the one detection module detects the light reflected by the skin, the m groups of PPG signals include a first group of PPG signals, the first group of PPG signals includes at least two signals collected by detection modules with different spacings, and the spacing of one detection module refers to the distance between the light source and the photodetector in the detection module; Determine m physiological parameter values ​​based on the m groups of PPG signals, each physiological parameter value being determined according to a group of PPG signals; A physiological parameter value of the user is determined based on the m physiological parameter values, where the physiological parameter value is related to the arterial activity of the user.

7. The method according to claim 6, characterized in that The two groups of detection modules in the PPG module include at least the same light source and / or at least the same photodetector.

8. The method according to claim 6 or 7, characterized in that: The physiological parameter value of the user is the maximum value, minimum value, average value, median value or mode value among the m physiological parameter values.

9. The method according to any one of claims 6 to 8, characterized in that: The physiological parameter value is a blood oxygen value, and in any one of the detection modules in the PPG module, the light emitted by the light source includes light of at least two wavelengths; Among the m blood oxygen values, one blood oxygen value is determined by one or more ratio values ​​R corresponding to a group of PPG signals, and one ratio value R is determined according to one PPG signal in a group of PPG signals. The ratio value R is used to reflect the ratio of the absorption rates of light of different wavelengths in the PPG signal.

10. The method according to claim 9, characterized in that The one blood oxygen value is obtained by inputting the one or more ratio values ​​R into a first blood oxygen model, wherein the first blood oxygen model is used to characterize the mathematical relationship between multiple ratio values ​​and blood oxygen, and the first blood oxygen model is determined based on multiple sets of data sets, wherein one set of data sets includes the blood oxygen value of the test person, and k ratio values ​​R calculated using PPG signals collected from the measured person using k (k≥1) detection modules.

11. The method according to any one of claims 6 to 10, characterized in that: Before collecting m groups of PPG signals through the m groups of detection modules, the method further includes: Collecting a first PPG signal through one detection module in the m groups of detection modules; Collecting m groups of PPG signals through the m groups of detection modules specifically includes: When the physiological parameter value reflected by the first PPG signal is abnormal, or the pulse reflected by the first PPG signal is incomplete, m groups of PPG signals are collected through the m groups of detection modules.

12. The method according to claim 2 or 11, characterized in that: The method further comprises: When the physiological parameter value reflected by the first PPG signal is normal, or the pulse reflected by the first PPG signal is complete, the physiological parameter value determined based on the first PPG signal is determined as the physiological parameter value of the user.

13. The method according to any one of claims 1 to 12, characterized in that: The physiological parameter value is the magnitude of a first physiological parameter, and the first physiological parameter includes any one or more of the following: blood oxygen, heart rate, respiratory rate, blood pressure, blood sugar, muscle oxygen, vascular resistance or brain oxygen.

14. The method according to any one of claims 1 to 13, characterized in that: The two detection modules in the PPG module include at least the same light source or at least the same photodetector.

15. An electronic device, characterized in that: include: PPG module, memory, one or more processors, and one or more programs; The PPG module includes n (n≥2) detection modules, each detection module includes a light source and a photodetector, and when the one or more processors execute the one or more programs, the electronic device implements the method as described in any one of claims 1 to 5 and 12 to 14.

16. An electronic device, characterized in that: include: PPG module, memory, one or more processors, and one or more programs; the PPG module includes m (m≥2) groups of detection modules, each group of detection modules includes one or more detection modules, each detection module includes a light source and a photodetector, and when the one or more processors execute the one or more programs, the electronic device implements the method as described in any one of claims 6 to 14.

17. A computer-readable storage medium comprising instructions, characterized in that: When the instructions are executed on an electronic device, the electronic device is caused to execute the method according to any one of claims 1 to 14.

18. A computer program product, characterized in that When the computer program product runs on a computer, the computer is caused to execute the method according to any one of claims 1 to 14.

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