Blood oxygen detection circuit and intelligent water cup

Abstract

The application discloses a blood oxygen detection circuit and an intelligent water cup, relates to the technical field of intelligent hardware and consumer electronics, and realizes automatic starting of blood oxygen detection through signal acquisition of a finger pressing signal, so that frequent manual operation of a user is not needed. The application can be flexibly adapted to single measurement and irregular measurement time, and satisfies diversified needs of the user. The application avoids power waste caused by starting detection at fixed time intervals when blood oxygen detection is not needed, and only starts the blood oxygen detector to perform detection when the finger is pressed, so that power consumption of the blood oxygen detector is effectively reduced, the endurance time of the blood oxygen detector is prolonged, and the blood oxygen detector is more energy-saving and efficient in use. The finger pressing signal is processed through a signal processing circuit, and the management chip controls starting and stopping of the blood oxygen detector, so that the blood oxygen detection process is more stable and reliable.

Description

Technical Field

[0001] This application relates to the fields of smart hardware and consumer electronics technology, and in particular to a blood oxygen detection circuit and a smart water cup. Background Technology

[0002] Pulse oximeters are widely used in the medical and health field and are one of the important means of monitoring human health. In practical applications, pulse oximeters are mainly activated in two ways: The first way is by manual control by the user to start the measurement. For example, with common clip-on pulse oximeters, the user needs to actively clip the pulse oximeter onto their finger and press the power button to activate the pulse oximeter function. The second way is that the pulse oximeter automatically sets the measurement interval in the program. For wearable devices such as some smartwatches, the user can preset the pulse oximeter measurement interval in the settings menu, and the pulse oximeter will automatically start measuring pulse oximeters according to the set time.

[0003] The first method relies to some extent on the user's active operation, which may be inconvenient for users with mobility issues or unfamiliar with the operation of the device. Although the second method reduces the frequency of user operation, it cannot flexibly meet the needs of some situations that require single measurement or irregular measurement time. In addition, the pulse oximeter will start the detection at fixed time intervals during the automatic detection process, regardless of whether there is an actual measurement need, which may cause waste of the pulse oximeter's power. Summary of the Invention

[0004] In view of the above problems, this application provides a blood oxygen detection circuit and a smart water cup to achieve convenient detection and power saving. The specific solution is as follows:

[0005] The first aspect of this application provides a blood oxygen detection circuit, including:

[0006] Signal acquisition circuit for collecting finger touch signals;

[0007] The signal processing circuit connected to the signal acquisition circuit outputs a first level when the signal acquisition circuit acquires the finger touch signal, and outputs a second level when the signal acquisition circuit does not acquire the finger touch signal.

[0008] The management chip connected to the signal processing module is in an enabled state when the signal processing circuit outputs a first level.

[0009] When the management chip is enabled, the pulse oximeter connected to the management chip performs pulse oximeter detection.

[0010] A power module that is connected to the signal acquisition circuit, the signal processing circuit, the management chip, and the pulse oximeter, respectively.

[0011] In one possible implementation, the signal acquisition circuit includes:

[0012] A metal sheet array comprising one or more metal sheets; or a capacitive sensor matrix comprising one or more capacitive sensors.

[0013] In one possible implementation, the area of ​​the metal sheet is greater than or equal to 10 mm². 2 The spacing between any two adjacent metal sheets is greater than or equal to 5 mm and less than or equal to 10 mm.

[0014] In one possible implementation, the signal processing circuit includes:

[0015] A first resistor, the first end of which is connected to the signal acquisition circuit, and the second end of which is connected to the first end of a second resistor and the power supply ground.

[0016] The second resistor, the second end of which is connected to the first end of the third resistor and the positive input terminal of the operational amplifier, respectively;

[0017] The third resistor, the second end of which is connected to the power supply ground;

[0018] The operational amplifier has its negative input terminal connected to the signal acquisition circuit and its output terminal connected to the management chip.

[0019] In one possible implementation, the signal processing circuit includes:

[0020] The fourth resistor has its first end connected to both the signal acquisition circuit and the first end of the fifth resistor, and its second end connected to the power supply ground.

[0021] The second end of the fifth resistor is connected to the first end of the sixth resistor and the first end of the first capacitor, respectively.

[0022] The second end of the sixth resistor is connected to the first end of the second capacitor and the negative input terminal of the operational amplifier, respectively.

[0023] The first capacitor has its second terminal connected to the power supply ground, the second terminal of the second capacitor, and the first terminal of the seventh resistor, respectively.

[0024] The second capacitor, the second terminal of the second capacitor is connected to the power supply ground and the first terminal of the seventh resistor respectively;

[0025] The second end of the seventh resistor is connected to the first end of the eighth resistor and the positive input terminal of the operational amplifier, respectively.

[0026] The eighth resistor, the second end of which is connected to the power module;

[0027] The operational amplifier, wherein the output terminal of the operational amplifier is connected to the first terminal of the ninth resistor;

[0028] The second end of the ninth resistor is connected to the first end of the third capacitor and the first end of the tenth resistor, respectively.

[0029] The third capacitor, the second terminal of the third capacitor is connected to the power ground and the first terminal of the fourth capacitor respectively;

[0030] The tenth resistor, the second end of which is connected to the second end of the fourth capacitor and the management chip respectively;

[0031] The fourth capacitor.

[0032] In one possible implementation, the power module includes:

[0033] power supply;

[0034] A first transient voltage suppression diode, the anode of which is connected to the positive terminal of the power supply; the cathode of the first transient voltage suppression diode is connected to the power supply ground and the cathode of the second transient voltage suppression diode, respectively.

[0035] The anode of the second transient voltage suppression diode is connected to the signal acquisition circuit.

[0036] In one possible implementation, the management chip is a low-dropout linear regulator or a microcontroller.

[0037] A second aspect of this application provides a smart water cup, wherein the smart water cup has a built-in blood oxygen detection circuit;

[0038] The blood oxygen detection circuit is as described in the first aspect.

[0039] In one possible implementation, the blood oxygen detection circuit is located on the handle of the smart water cup.

[0040] In one possible implementation, the signal acquisition circuit in the blood oxygen detection circuit is located on the surface of the handle of the smart water cup.

[0041] By employing the above technical solution, this application provides a blood oxygen detection circuit that automatically initiates blood oxygen detection by acquiring finger touch signals through a signal acquisition circuit, eliminating the need for frequent manual operation by the user. Compared to the method of some smartwatches and other wearable devices that automatically start detection at fixed time intervals, this application can flexibly adapt to single measurements and irregular measurement times, meeting diverse user needs. It avoids the power waste caused by blood oxygen detectors starting detection at fixed time intervals when no detection is needed; the blood oxygen detector only starts detecting when a finger touches it, effectively reducing the power consumption of the blood oxygen detector, extending its battery life, and making it more energy-efficient during use. The signal processing circuit processes the acquired finger touch signals, and the management chip controls the start and stop of the blood oxygen detector. This design makes the blood oxygen detection process more stable and reliable, reducing measurement errors or failures caused by misoperation or inaccurate automatic timing of the blood oxygen detector's start, ensuring the accuracy and reliability of the blood oxygen detection results. Attached Figure Description

[0042] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0043] Figure 1 A circuit diagram of the blood oxygen detection circuit provided in the embodiments of this application;

[0044] Figure 2 A schematic diagram of one implementation of the blood oxygen detection circuit including a first signal processing circuit provided in the embodiments of this application;

[0045] Figure 3 A schematic diagram of one implementation of a blood oxygen detection circuit including a second signal processing circuit provided in an embodiment of this application;

[0046] Figure 4 A circuit diagram illustrating one implementation of a second power module provided in this application embodiment;

[0047] Figure 5 This is a schematic diagram of the structure of the smart water cup provided in the embodiments of this application;

[0048] Figure 6 A schematic diagram of the cup handle provided in an embodiment of this application. Detailed Implementation

[0049] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.

[0050] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0051] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0052] like Figure 1 The diagram shown is a circuit diagram of the blood oxygen detection circuit provided in an embodiment of this application.

[0053] The blood oxygen detection circuit includes: a signal acquisition circuit 101, a signal processing circuit 102, a management chip 103, a blood oxygen detector 104, and a power supply module 105.

[0054] The signal acquisition circuit 101 acquires the finger touch signal.

[0055] The signal processing circuit 102, which is connected to the signal acquisition circuit, outputs a first level when the signal acquisition circuit acquires the finger touch signal, and outputs a second level when the signal acquisition circuit does not acquire the finger touch signal.

[0056] The management chip 103, which is connected to the signal processing module, is in an enabled state when the signal processing circuit outputs a first level.

[0057] The pulse oximeter 104, which is connected to the management chip, performs pulse oximeter detection when the management chip is enabled.

[0058] A power module 105 is connected to the signal acquisition circuit 101, the signal processing circuit 102, the management chip 103, and the pulse oximeter 104, respectively.

[0059] For example, the first level is lower than the second level, that is, the first level is low and the second level is high; or, the first level is higher than the second level, that is, the first level is high and the second level is low.

[0060] This application provides a blood oxygen detection circuit that automatically initiates blood oxygen detection by acquiring finger touch signals through a signal acquisition circuit, eliminating the need for frequent manual operation by the user. Compared to the fixed-interval automatic detection methods of some smartwatches and other wearable devices, this application can flexibly adapt to single measurements and irregular measurement times, meeting diverse user needs. It avoids the power waste caused by blood oxygen detectors starting detection at fixed intervals when not in use; the blood oxygen detector only activates when a finger touches it, effectively reducing power consumption and extending battery life, making it more energy-efficient during use. The acquired finger touch signals are processed by a signal processing circuit, and the start and stop of the blood oxygen detector are controlled by a management chip. This design makes the blood oxygen detection process more stable and reliable, reducing measurement errors or failures caused by misoperation or inaccurate automatic timing of the blood oxygen detector's start, ensuring the accuracy and reliability of the blood oxygen detection results.

[0061] The implementation methods of each circuit are described below.

[0062] In one optional implementation, the signal acquisition circuit can be implemented in ways including but not limited to the following two.

[0063] The first type of signal acquisition circuit is a metal plate array comprising one or more metal plates.

[0064] The signal acquisition circuit works by detecting a finger touching a metal plate, which alters the electric field distribution around the plate and creates a capacitor between the plate and the human body. This change in capacitance can be detected by the signal acquisition circuit, thus sensing the finger's touch. The metal plate, acting as the sensing element, sensitively responds to the approach or contact of a finger, providing the raw input for subsequent signal processing.

[0065] For example, the metal plate array can be located around the pulse oximeter.

[0066] For example, the metal sheet array includes two metal sheets, and a finger will touch both metal sheets at the same time.

[0067] For example, the area of ​​each metal sheet is greater than or equal to 10 mm². 2 The spacing between any two adjacent metal sheets is greater than or equal to 5 mm and less than or equal to 10 mm.

[0068] The second type of signal acquisition circuit is a capacitive sensor matrix that includes one or more capacitive sensors.

[0069] A capacitive sensor matrix is ​​an array of capacitive sensors that detects finger touch signals based on changes in capacitance. When no finger is touching the capacitive sensor, it is in its initial state, and its capacitance value is relatively stable. When a finger touches the capacitive sensor, an additional capacitance is formed between the finger and the sensor. This change in capacitance alters the total capacitance value of the capacitive sensor. The signal acquisition circuit detects this capacitance change and converts it into an electrical signal.

[0070] In one optional implementation, there are multiple ways to implement the signal processing circuit. The embodiments of this application provide, but are not limited to, the following two.

[0071] The first signal processing circuit includes: a first resistor R1, a second resistor R2, a third resistor R3, and an operational amplifier U1.

[0072] like Figure 2 The diagram shown is a schematic representation of one implementation of a blood oxygen detection circuit including a first signal processing circuit provided in an embodiment of this application.

[0073] Figure 2 The signal acquisition circuit is a metal plate array consisting of two metal plates. Figure 2 The two circles in the middle represent the metal sheet.

[0074] The first resistor R1 has its first end connected to the signal acquisition circuit 101, and its second end is connected to the first end of the second resistor and the power ground GND.

[0075] The second resistor R2 has its second end connected to the first end of the third resistor and the positive input terminal of the operational amplifier, respectively.

[0076] The third resistor R3 has its second end connected to the power supply ground.

[0077] The operational amplifier U1 has its negative input terminal connected to the signal acquisition circuit 101, and its output terminal connected to the management chip 103.

[0078] Figure 2 The metal sheet is used as a signal acquisition module, which has a simple structure and is easy to implement.

[0079] By using feedback resistors, namely the second resistor R2 and the third resistor R3, the output of operational amplifier U1 can be stabilized and signal fluctuations reduced.

[0080] The second type of signal processing circuit includes: a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, a seventh resistor R7, an eighth resistor R8, an operational amplifier U2, a ninth resistor R9, a third capacitor C3, a tenth resistor R10, and a fourth capacitor C4, wherein:

[0081] like Figure 3 The diagram shown is a schematic representation of one implementation of a blood oxygen detection circuit including a second signal processing circuit provided in this application embodiment.

[0082] The fourth resistor R4 has its first end connected to both the signal acquisition circuit and the first end of the fifth resistor, and its second end connected to the power supply ground.

[0083] The second end of the fifth resistor R5 is connected to the first end of the sixth resistor and the first end of the first capacitor C1, respectively.

[0084] The sixth resistor R6, the second end of the sixth resistor is connected to the first end of the second capacitor and the negative input terminal of the operational amplifier respectively;

[0085] The first capacitor C1, the second terminal of the first capacitor is connected to the power ground GND, the second terminal of the second capacitor C2 and the first terminal of the seventh resistor R7 respectively.

[0086] The second capacitor C2, the second terminal of the second capacitor is connected to the power supply ground and the first terminal of the seventh resistor R7 respectively;

[0087] The seventh resistor R7, the second end of which is connected to the first end of the eighth resistor R8 and the positive input terminal of the operational amplifier U2;

[0088] The eighth resistor R8, the second end of which is connected to the power module VCC;

[0089] The operational amplifier U2, the output terminal of the operational amplifier is connected to the first terminal of the ninth resistor R9;

[0090] The second end of the ninth resistor R9 is connected to the first end of the third capacitor C3 and the first end of the tenth resistor R10, respectively.

[0091] The third capacitor C3, the second terminal of the third capacitor is connected to the power ground and the first terminal of the fourth capacitor C4 respectively;

[0092] The tenth resistor R10, the second end of which is connected to the second end of the fourth capacitor and the management chip 103 respectively;

[0093] The fourth capacitor C4.

[0094] The fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 constitute the filter circuit.

[0095] A filter circuit, composed of resistors and capacitors, is configured at the front end of operational amplifier U2. This circuit filters the signal input to operational amplifier U2, removing high-frequency noise and interference components. High-frequency noise generated by factors such as ripple in the power supply module and external electromagnetic interference is significantly weakened or eliminated after passing through the filter circuit, resulting in a cleaner and smoother signal entering operational amplifier U2, thus improving the accuracy of signal processing.

[0096] The aforementioned ninth resistor R9 and tenth resistor R10 are typically used to set the input voltage divider and feedback for operational amplifier U2. They form a voltage divider network to adjust the voltage threshold input to operational amplifier U2, thereby enabling accurate comparison of different signal levels. Simultaneously, the feedback resistors also help stabilize the output of operational amplifier U2.

[0097] The eighth resistor R8 and the seventh resistor R7 are connected to the output of operational amplifier U2 to limit current and set impedance matching for signal transmission, ensuring that the signal is stably transmitted to the input of operational amplifier U2.

[0098] The following is combined with Figure 2 The implementation principle of the blood oxygen detection circuit provided in the embodiments of this application will be explained.

[0099] When the finger is not in contact with the metal plate array, the negative input of operational amplifier U1 is at the first level, and the positive input of operational amplifier U1 is VCC×R2 / R3; the output of operational amplifier U1 is at the second level. When the finger touches the metal plate array, the negative input of operational amplifier U1 is at the second level, and the output of operational amplifier U1 is at the first level. This can drive the enable pin of a management chip such as a low dropout linear regulator (LDO) or a pin of a microcontroller, thereby waking up the pulse oximeter 104 through the management chip and initiating the acquisition of pulse oximetry data.

[0100] In one optional implementation, there are multiple ways to implement the power module. The embodiments of this application provide, but are not limited to, the following two.

[0101] The first type of power module is the power supply VCC.

[0102] The second type of power module includes: power supply VCC, a first transient voltage suppression diode (TVS diode) TVS1, and a second transient voltage suppression diode TVS2, wherein:

[0103] like Figure 4 The diagram shown is a circuit diagram of one implementation of the second power module provided in this application embodiment.

[0104] The first transient voltage suppressor diode TVS1 has its anode connected to the anode of the power supply VCC; the cathode of the first transient voltage suppressor diode TVS1 is connected to the power supply ground GND and the cathode of the second transient voltage suppressor diode TVS2, respectively.

[0105] The anode of the second transient voltage suppression diode TVS2 is connected to the signal acquisition circuit 101.

[0106] TVS diodes can quickly absorb transient overvoltage energy, thereby stabilizing the power supply voltage and ensuring that the circuit operates within its normal operating voltage range. This is crucial for pulse oximeters, as voltage fluctuations in the power module can affect the accuracy of the measurement results.

[0107] TVS diodes can quickly respond to and suppress transient overvoltages in a circuit, such as voltage spikes caused by electrostatic discharge (ESD) and lightning strikes. This effectively protects other components in the circuit, such as signal acquisition circuits, signal processing circuits, management chips, and pulse oximeters, from damage due to overvoltage. TVS diodes typically have bidirectional protection characteristics, protecting the circuit from both forward and reverse overvoltages. In contrast, power modules that only contain the power supply VCC cannot provide this bidirectional protection.

[0108] Transient overvoltages can cause some components in a circuit to trigger falsely, thus affecting the normal operation of the equipment. The presence of a TVS diode can reduce the possibility of such false triggering and improve the stability of the equipment.

[0109] It is understandable that the first transient voltage suppressor diode (TVS1) and the second transient voltage suppressor diode (TVS2) can constitute an anti-static diode. A TVS diode is a semiconductor device commonly used for circuit protection, capable of quickly responding to and suppressing transient overvoltages, such as electrostatic discharge (ESD). When a circuit experiences ESD, the TVS diode quickly conducts, clamping the overvoltage to a safe voltage level, thereby protecting downstream circuitry from damage. Under normal operating voltage, the TVS diode is in a high-resistance state, not affecting the normal operation of the circuit. When transient overvoltages such as ESD occur, the voltage across the TVS diode rises rapidly. Once the voltage exceeds the TVS diode's breakdown voltage, the TVS diode immediately conducts, guiding the overvoltage to ground, thus protecting other components in the circuit.

[0110] In summary, to prevent interference from humidity, thunderstorms, electromagnetic interference, etc., this circuit adds an anti-static tube, sets up a filter circuit at the front end of the operational amplifier, and sets up a voltage divider network at the back end of the operational amplifier. This can effectively solve the above interference and optimize the circuit interference caused by finger movement.

[0111] In one alternative implementation, the management chip is a low-dropout linear regulator or a microcontroller.

[0112] An LDO (Low Dropout Linear Regulator) is a power management chip used to provide a stable power supply voltage for a pulse oximeter. When operational amplifier U1 outputs a first level, this first level drives the LDO's enable pin (EN pin). Once the LDO's enable pin is activated, the LDO begins operation, providing a stable power supply voltage to the pulse oximeter, thereby starting the pulse oximeter to perform detection.

[0113] When operational amplifier U1 outputs a first level, this first level will trigger a certain pin of the microcontroller (such as a GPIO pin). After detecting this signal, the microcontroller will execute a preset program, such as waking up the pulse oximeter, thereby starting the pulse oximeter to perform detection.

[0114] The blood oxygen detection circuit provided in this application embodiment consumes less power than optical detection methods. For example, if the human body impedance is in the megaohm range, the current is negligible, and the operational amplifier's power consumption is currently in the low μA range, far lower than that of optical detection.

[0115] This application also provides a smart water cup, which has a built-in blood oxygen detection circuit; wherein the blood oxygen detection circuit is as described in the above embodiments.

[0116] In one alternative implementation, the blood oxygen detection circuit is located on the handle of the smart water cup.

[0117] In one alternative implementation, the signal acquisition circuit in the blood oxygen detection circuit is located on the surface of the handle of the smart water cup.

[0118] like Figure 5 The diagram shown is a structural schematic of the smart water cup provided in an embodiment of this application.

[0119] The smart water bottle includes: a handle 501, a body 502, a display screen 503, a blood oxygen detector 104, a base 505, and a main control board.

[0120] The handle refers to the grip part of the smart water bottle, which is the main contact part when the user holds the water bottle.

[0121] The bottom of the cup is the base of the smart water cup, which supports the cup body and serves as a carrier for components such as the speaker, main control board, and battery.

[0122] The main control board is the core component of the smart water bottle, responsible for processing blood oxygen detection data, controlling the display screen, managing the power module, and other functions.

[0123] For example, the main control board includes, but is not limited to: controller, memory, power management module, and communication module.

[0124] For example, the controller can be any one or more processors such as a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor (MP), or a digital signal processor (DSP).

[0125] The functions of smart water cups in related technologies are relatively limited, and they have not been widely used in health monitoring. This application combines a blood oxygen detector with a water cup, allowing blood oxygen levels to be detected while drinking water, thereby achieving the goal of early disease prevention.

[0126] For example, the cup handle and the cup body are connected by screws.

[0127] For example, if there is no handle, the pulse oximeter 104 can also be mounted on the cup body.

[0128] For example, display screen 503 is a curved screen.

[0129] For example, the handle 501 and the cup body 502 are seamlessly connected.

[0130] Seamless connection means that there are no obvious seams or breaks between the cup handle 501 and the cup body 502, forming a smooth, continuous surface. This design not only enhances the product's aesthetics but also strengthens its durability and functionality.

[0131] The handle 501 and the body 502 are made of the same material (such as stainless steel, glass, plastic, ceramic, etc.) to ensure consistency in their physical and chemical properties.

[0132] For example, during the injection molding process, the cup handle 501 and the cup body 502 are molded simultaneously to ensure a seamless connection between the two.

[0133] For example, the cup handle 501 and the cup body 502 are pressed together by high temperature and high pressure to form a seamless connection.

[0134] For example, a high-strength, high-temperature resistant adhesive is used to bond the cup handle 501 and the cup body 502 together, ensuring the stability and durability of the connection.

[0135] For example, the cup handle 501 and the cup body 502 are connected by screws.

[0136] For example, the bottom of the cup is connected to the body of the cup by screws to ensure the stability and sealing of the structure.

[0137] Understandable, Figure 5 The shapes of the cup body, handle, display screen, and base shown are merely examples and are not intended to limit the scope of the invention.

[0138] like Figure 6 The diagram shown is a structural schematic of the cup handle provided in an embodiment of this application.

[0139] like Figure 6 As shown, the base 506 of the cup handle and the outer shell 507 of the cup handle form a hollow cavity.

[0140] For example, the material of the housing 507 can be determined based on the actual situation; for example, it can be silicone.

[0141] For example, the hollow cavity formed by the base 506 and the outer shell 507 of the cup handle is used to carry the wiring of the pulse oximeter 104. The hollow cavity allows the wiring to be routed inside the cup handle, avoiding external exposure, which is both aesthetically pleasing and safe.

[0142] The hollow cavity formed by the base 506 of the cup handle and the outer shell 507 is one of the core structures of the entire design. It not only provides space for the installation and fixation of the pulse oximeter's wiring, but also ensures the product's stability and reliability through wiring, heat dissipation, and waterproofing design. This design significantly improves both the functionality and user experience of the smart water bottle.

[0143] When a person drinks water, they hold the cup with their fingers. The finger, like the thumb, naturally receives signals from the pulse oximeter, which then detects the blood oxygen level and displays it on the screen.

[0144] The pulse oximeter 104 is installed inside the cup handle, which is ergonomic and allows for effective contact with the user's fingers.

[0145] For example, the pulse oximeter 104 can also be mounted on the bottom of the cup 505.

[0146] Understandable, Figure 6 The shapes and sizes of the cups shown, including the shape and size of the handle, the size of the display screen, and the shape of the bottom, are merely examples and are not intended to limit the scope of the cups.

[0147] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. In addition, in the device embodiment drawings provided in this application, the connection relationship between modules indicates that they have a communication connection, which can be implemented as one or more communication buses or signal lines.

[0148] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, or it can be implemented by special-purpose hardware including application-specific integrated circuits, special-purpose CPUs, special-purpose memory, special-purpose components, etc. Generally, any function performed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be diverse, such as analog circuits, digital circuits, or special-purpose circuits. However, for this application, software program implementation is more often the preferred implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, training equipment, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0149] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.

Claims

1. A blood oxygen detection circuit, characterized in that, include: Signal acquisition circuit for collecting finger touch signals; The signal processing circuit connected to the signal acquisition circuit outputs a first level when the signal acquisition circuit acquires the finger touch signal, and outputs a second level when the signal acquisition circuit does not acquire the finger touch signal. The management chip connected to the signal processing module is in an enabled state when the signal processing circuit outputs a first level. When the management chip is enabled, the pulse oximeter connected to the management chip performs pulse oximeter detection. A power module that is connected to the signal acquisition circuit, the signal processing circuit, the management chip, and the pulse oximeter, respectively.

2. The blood oxygen detection circuit according to claim 1, characterized in that, The signal acquisition circuit includes: A metal sheet array comprising one or more metal sheets; or a capacitive sensor matrix comprising one or more capacitive sensors.

3. The blood oxygen detection circuit according to claim 2, characterized in that, The area of ​​the metal sheet is greater than or equal to 10 mm². 2 The spacing between any two adjacent metal sheets is greater than or equal to 5 mm and less than or equal to 10 mm.

4. The blood oxygen detection circuit according to claim 1, characterized in that, The signal processing circuit includes: A first resistor, the first end of which is connected to the signal acquisition circuit, and the second end of which is connected to the first end of a second resistor and the power supply ground. The second resistor, the second end of which is connected to the first end of the third resistor and the positive input terminal of the operational amplifier, respectively; The third resistor, the second end of which is connected to the power supply ground; The operational amplifier has its negative input terminal connected to the signal acquisition circuit and its output terminal connected to the management chip.

5. The blood oxygen detection circuit according to any one of claims 1 to 4, characterized in that, The signal processing circuit includes: The fourth resistor has its first end connected to both the signal acquisition circuit and the first end of the fifth resistor, and its second end connected to the power supply ground. The second end of the fifth resistor is connected to the first end of the sixth resistor and the first end of the first capacitor, respectively. The second end of the sixth resistor is connected to the first end of the second capacitor and the negative input terminal of the operational amplifier, respectively. The first capacitor has its second terminal connected to the power supply ground, the second terminal of the second capacitor, and the first terminal of the seventh resistor, respectively. The second capacitor, the second terminal of the second capacitor is connected to the power supply ground and the first terminal of the seventh resistor respectively; The second end of the seventh resistor is connected to the first end of the eighth resistor and the positive input terminal of the operational amplifier, respectively. The eighth resistor, the second end of which is connected to the power module; The operational amplifier, wherein the output terminal of the operational amplifier is connected to the first terminal of the ninth resistor; The second end of the ninth resistor is connected to the first end of the third capacitor and the first end of the tenth resistor, respectively. The third capacitor, the second terminal of the third capacitor is connected to the power ground and the first terminal of the fourth capacitor respectively; The tenth resistor, the second end of which is connected to the second end of the fourth capacitor and the management chip respectively; The fourth capacitor.

6. The blood oxygen detection circuit according to any one of claims 1 to 4, characterized in that, The power module includes: power supply; A first transient voltage suppression diode, the anode of which is connected to the positive terminal of the power supply; the cathode of the first transient voltage suppression diode is connected to the power supply ground and the cathode of the second transient voltage suppression diode, respectively. The anode of the second transient voltage suppression diode is connected to the signal acquisition circuit.

7. The blood oxygen detection circuit according to any one of claims 1 to 4, characterized in that, The management chip is a low-dropout linear regulator or a microcontroller.

8. A smart water cup, characterized in that, The smart water cup has a built-in blood oxygen detection circuit. The blood oxygen detection circuit is the blood oxygen detection circuit as described in any one of claims 1 to 7.

9. The smart water cup according to claim 8, characterized in that, The blood oxygen detection circuit is located on the handle of the smart water cup.

10. The smart water cup according to claim 9, characterized in that, The signal acquisition circuit in the blood oxygen detection circuit is located on the surface of the handle of the smart water cup.

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