An intelligent wearable device

Abstract

The utility model discloses a kind of intelligent wearable equipment, and the photoelectric pulse wave sensor area of intelligent wearable equipment is provided with 3 light emitting units and 6 light receiving units in matrix arrangement, 3 emitting units are in linear arrangement, and 6 light receiving units are divided into two groups about the line symmetry of 3 emitting units.3 emitting units include the first light emitting unit located in the center of photoelectric pulse wave sensor area, and the second light emitting unit and the third light emitting unit symmetrically arranged about the first light emitting unit, and the first light emitting unit includes first green light LED, and the second light emitting unit and the third light emitting unit respectively contain green light LED, red light LED and infrared light LED.The utility model can improve physiological signal measurement accuracy while reducing the power consumption of intelligent wearable equipment, meet the double needs of user for accurate, long-acting health monitoring and low-energy consumption operation.

Description

Technical Field

[0001] This utility model belongs to the field of electronic equipment technology, specifically relating to a smart wearable device. Background Technology

[0002] With the rapid development of technology, smart wearable devices are increasingly integrating into people's daily lives, and their reach continues to expand. However, existing smart wearable devices suffer from several unresolved issues regarding sensor layout. For example, signal interference is a problem. In traditional photoelectric sensors, the asymmetrical layout of the LED (Light Emitting Diode) and the receiving unit leads to inconsistent signal paths. This discrepancy causes varying degrees of signal attenuation and interference during transmission, severely impacting measurement accuracy and significantly reducing the accuracy of the physiological signals acquired. Furthermore, most smart wearable devices only support single functions such as heart rate or blood oxygenation, lacking multimodal data fusion capabilities. They cannot simultaneously collect and analyze multiple physiological signals, failing to meet users' needs for comprehensive health monitoring. Moreover, the unreasonable distribution of LED light sources in smart wearable devices leads to light leakage during nighttime use. This not only affects the user experience, such as disrupting sleep, but may also cause light pollution to the surrounding environment. These factors limit the wearing comfort and user acceptance of smart wearable devices to some extent. Utility Model Content

[0003] To achieve the above objectives, the purpose of this application is to provide a smart wearable device that can improve the accuracy of physiological signal measurement while reducing the power consumption of the smart wearable device, thereby meeting users' dual needs for accurate and long-term health monitoring and low-energy operation.

[0004] This application provides a smart wearable device, including:

[0005] The photoelectric pulse wave sensor area is equipped with three light emitting units and six light receiving units arranged in a matrix. The three emitting units are arranged in a straight line, and the six light emitting units are divided into two groups symmetrical about the straight line where the three emitting units are located.

[0006] The three emitting units include a first light emitting unit located at the center of the photoelectric pulse wave sensor area, and a second light emitting unit and a third light emitting unit symmetrically arranged about the first light emitting unit. The first light emitting unit includes a first green LED, and the second and third light emitting units respectively include a green LED, a red LED and an infrared LED.

[0007] Furthermore, two semi-annular electrode plates are arranged around the photoelectric pulse wave sensor area.

[0008] Furthermore, the second light emitting unit includes a second green LED, a first red LED, and a first infrared LED. The second green LED is positioned close to the first green LED, while the first red LED and the first infrared LED are positioned away from the first green LED.

[0009] The third light emitting unit includes a third green LED, a second red LED, and a second infrared LED. The third green LED is positioned close to the first green LED, while the second red LED and the second infrared LED are positioned away from the first green LED.

[0010] Furthermore, the optical receiving unit includes:

[0011] The first and second optical receivers are symmetrically arranged with respect to the first optical transmitting unit;

[0012] The third and fourth optical receivers are symmetrically arranged with respect to the second optical transmitting unit;

[0013] The fifth and sixth optical receivers are symmetrically arranged with respect to the third optical transmitting unit.

[0014] Furthermore, the light emitting unit, the light receiving unit, and the electrode sheet are respectively connected to the vital signs monitoring chip, and the vital signs chip is connected to the main control chip of the smart wearable device.

[0015] Furthermore, the vital signs monitoring chip includes 8 LED driver channels, 4 optical signal input channels, and 1 EDA channel.

[0016] Each LED of the light emitting unit is connected to one of the eight LED driving channels of the vital signs monitoring chip, and the light receiving unit is connected to one of the four light signal input channels of the vital signs monitoring chip. The electrode sheet is connected to the EDA channel.

[0017] Furthermore, the first optical receiver is connected to the first channel of the four optical signal input channels, the second optical receiver is connected to the second channel of the four optical signal input channels, the third and fourth optical receivers are connected to the third channel of the four optical signal input channels, and the fifth and sixth optical receivers are connected to the fourth channel of the four optical signal input channels.

[0018] Furthermore, the smart wearable device includes a glass housing, a light emitting unit, and a light receiving unit located inside the smart wearable device and positioned corresponding to the glass housing.

[0019] The electrode sheet is a conductive coating disposed on the glass shell.

[0020] Furthermore, the conductive coating is an indium tin oxide or graphene composite material with a surface resistance of less than 10 ohms per square meter.

[0021] This application includes a photoelectric pulse wave sensor area in a smart wearable device with three light emitting units and six light receiving units arranged in a matrix. The three emitting units are arranged in a straight line, and the six light receiving units are divided into two groups symmetrical about the line containing the three emitting units. The three emitting units include a first light emitting unit located at the center of the photoelectric pulse wave sensor area, and a second and a third light emitting unit symmetrically arranged about the first light emitting unit. The first light emitting unit includes a first green LED, and the second and third light emitting units respectively include a green LED, a red LED, and an infrared LED.

[0022] Regarding low power consumption, this application places high-power components (such as infrared LEDs) away from the central area. This layout avoids heat concentration affecting sensor stability and also reduces power consumption. Heat concentration leads to performance degradation, requiring components to consume more energy to maintain normal operation. Distributing high-power components effectively avoids this. Furthermore, the distributed layout of the receiving unit reduces thermal crosstalk, further improves signal path consistency, and reduces environmental interference. In a stable signal environment, the controller of the smart wearable device does not need to consume additional energy to process interference signals, thus achieving low-power operation.

[0023] Furthermore, the symmetrical matrix layout of the optical emitting and receiving units ensures a consistent signal path, effectively reducing signal attenuation or interference caused by asymmetrical design. This eliminates the need to compensate for signal loss by increasing transmission power while maintaining signal quality, thus reducing overall power consumption. Positioning the first green LED at the center, with red and infrared LEDs distributed around it, combined with diagonal receiving units (such as the third and fourth optical receivers) to capture the signal, significantly enhances the signal-to-noise ratio (SNR) of blood oxygen measurement. A high SNR means that, under the same measurement accuracy requirements, the transmission power of the optical emitting unit can be reduced, thereby reducing power consumption and achieving the goal of improving blood oxygen measurement performance while maintaining low power consumption.

[0024] Furthermore, since the first green LED is located at the center of the sensor area, this design supports different heart rate measurement modes to balance power consumption and performance. In low-power heart rate measurement mode, only the first green LED and its adjacent light receiving unit can be turned on for heart rate measurement, which minimizes energy consumption and is suitable for use in scenarios with high battery life requirements. In high-performance heart rate measurement mode, all three green LEDs and all light receiving units can be turned on to improve measurement accuracy and meet the needs of scenarios with high requirements for heart rate measurement accuracy. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a perspective view of a smart wearable device provided in one embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram from another perspective of an embodiment of the smart wearable device provided by this utility model;

[0028] Figure 3 This is a schematic diagram of the sensor area of ​​a smart wearable device provided in one embodiment of the present invention;

[0029] Figure 4 This is a block diagram of a smart ring provided in one embodiment of the present invention. Detailed Implementation

[0030] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] Figures 1-3 An implementation method for a smart wearable device is provided. The smart wearable device 100 provided in this disclosure is a portable device worn directly on the body or integrated into the user's clothing or accessories. The smart wearable device 100 may include, but is not limited to, smartwatches, smart bracelets, smart wristbands, smart rings, etc. In this embodiment, a smartwatch is used as an example for illustration.

[0035] like Figures 1 to 3 As shown, the smart wearable device 100 includes a housing 110 and straps 120 connected to both ends of the housing 110. The straps 120 can be used to attach the housing 110 to the user's wrist. A display screen 130 is mounted on the housing 110. The housing 110 can accommodate the functional modules of the wearable device. The functional modules may include circuit boards, processors, memory, sensors, batteries, and other components to realize various functions of the wearable device. Internal sensors may include motion sensors and biosensors. Motion sensors may include gyroscopes, accelerometers, magnetometers, etc., for detecting the motion information of the wearable device. Biosensors may include photoplethysmography (PPG) sensors, ECG (electrocardiogram) sensors, temperature sensors, etc., for acquiring human biological information such as heart rate, blood oxygen, blood pressure, and oxygen uptake. The display screen 130 can be used to display various information such as time, health indicators, and other information. The display screen 130 may be a touch screen display including capacitive touch sensors, resistive touch sensors, or other touch sensor components, or it may be a non-touch-sensitive display screen. The housing 110 may be square, circular, or other shapes. exist Figure 1 In the illustrated embodiment, the housing 110 is square with rounded corners. The housing 110 can be made of various materials, such as plastic, ceramic, metal (e.g., stainless steel, aluminum, titanium alloy, etc.), other suitable materials, or any combination of two or more of these materials.

[0036] A sensor area 140 for sensing human physiological signals is provided on the side of the housing 110 opposite to the display screen 130. This area includes a photoelectric pulse wave sensor area 150 located in the center, and two semi-annular electrode plates 141 surrounding the photoelectric pulse wave sensor area 150. The sensor area 140 is preferably located in the center of the housing 110 so that it is in close contact with the human body when the smart wearable device 100 is worn. The housing 110 corresponding to the sensor area 140 includes a transparent portion. A light emitting unit and a light receiving unit are located inside the smart wearable device 100 and are arranged corresponding to the transparent portion. When the user wears the smart wearable device 100, the light emitting unit emits light through the transparent portion toward the human tissue, and the light reflected by the human tissue passes through the transparent portion and is received by the light receiving unit. Human physiological signals (such as heart rate, blood oxygen saturation, etc.) are obtained based on PPG (Photoplethysmography) technology. The transparent part can be integrally formed with other parts of the housing 110, for example, it can be integrally formed by two-color injection molding, or the transparent part can be formed separately and then assembled with other parts of the housing 110.

[0037] The photoelectric pulse wave sensor area 150 is provided with three light emitting units and six light receiving units arranged in a matrix. The three emitting units are arranged in a straight line, and the six light emitting units are divided into two groups symmetrical about the line containing the three emitting units. Specifically, the three emitting units include a first light emitting unit 151 located at the center of the photoelectric pulse wave sensor area 150, and a second light emitting unit 152 and a third light emitting unit 153 symmetrically arranged about the first light emitting unit 151. The first light emitting unit 151 includes a first green LED 161, and the second light emitting unit 152 and the third light emitting unit 153 respectively include a green LED, a red LED, and an infrared LED.

[0038] The second light emitting unit 152 includes a second green LED 162, a first red LED 164, and a first infrared LED 165. The second green LED 162 is located close to the first green LED 161, while the first red LED 164 and the first infrared LED 165 are located away from the first green LED 161. The third light emitting unit 153 includes a third green LED 163, a second red LED 166, and a second infrared LED 167. The third green LED 163 is located close to the first green LED 161, while the second red LED 166 and the second infrared LED 167 are located away from the first green LED 161.

[0039] The light receiving unit includes: a first light receiver 171 and a second light receiver 172 symmetrically arranged with respect to the first light emitting unit 151; a third light receiver 173 and a fourth light receiver 174 symmetrically arranged with respect to the second light emitting unit 152; and a fifth light receiver 175 and a sixth light receiver 176 symmetrically arranged with respect to the third light emitting unit. Preferably, the light receiver is a photodiode. The photodiode receives the light signal emitted by the light emitting unit and reflected or transmitted through human tissue, converts it into an electrical signal, and further processes it to obtain physiological information such as heart rate and blood oxygen saturation.

[0040] Regarding low power consumption, this embodiment places high-power components (such as infrared LEDs) away from the central area. This layout avoids heat concentration affecting sensor stability and also reduces power consumption. Heat concentration leads to performance degradation, requiring components to consume more energy to maintain normal operation. Distributing high-power components effectively avoids this. Furthermore, the distributed layout of the receiving unit reduces thermal crosstalk, further improving signal path consistency and reducing environmental interference. In a stable signal environment, the sensor does not need to consume additional energy to process interference signals, thus achieving low-power operation.

[0041] Furthermore, the symmetrical matrix layout of the optical emitting and receiving units ensures a consistent signal path, effectively reducing signal attenuation or interference caused by asymmetrical design. This eliminates the need to compensate for signal loss by increasing transmission power while maintaining signal quality, thus reducing overall power consumption. Positioning the first green LED 161 at the center, with red and infrared LEDs distributed around it, and combining this with diagonal receiving units (such as the third and fourth optical receivers 173 and 174) to capture the signal, significantly enhances the signal-to-noise ratio (SNR) of blood oxygen measurement. A high SNR means that, under the same measurement accuracy requirements, the transmission power of the optical emitting unit can be reduced, thereby reducing power consumption and achieving the goal of improving blood oxygen measurement performance while maintaining low power consumption.

[0042] Furthermore, since the first green LED 161 is located at the center of sensor area 140, this design supports different heart rate measurement modes to balance power consumption and performance. In low-power heart rate measurement mode, only the first green LED 161 and its adjacent light receiving unit can be turned on for heart rate measurement, which minimizes power consumption and is suitable for use in scenarios with high battery life requirements. In high-performance heart rate measurement mode, all three green LEDs and all light receiving units can be turned on to improve measurement accuracy and meet the needs of scenarios with high requirements for heart rate measurement accuracy.

[0043] Two semi-circular electrode pads 141 are arranged around the photoelectric pulse wave sensor area 150. These semi-circular electrode pads 141 are used for measuring EDA (Electrodermal Activity) signals. Electrodermal activity signals can serve as an important indicator for assessing a person's mood and stress levels. For example, when a person feels tense or anxious, their electrodermal activity increases. By monitoring and analyzing the electrodermal signals through a chip, users can understand their own emotional state. In some smart wearable devices 100, this function can be used to provide users with a reference for their psychological state. Furthermore, by continuously monitoring electrodermal activity and combining it with other vital sign data (such as heart rate and blood oxygenation), a more comprehensive assessment of a person's health status can be achieved, assisting in early disease screening and health management.

[0044] In some embodiments, the sensor region 140 of the housing 110 is made of glass as a glass housing. The light emitting unit and the light receiving unit are located inside the smart wearable device 100 and are positioned corresponding to the glass housing. The electrode sheet 141 is a conductive coating disposed on the glass housing. The conductive coating is ITO (Indium Tin Oxide) or graphene composite material with a surface resistance of less than 10 ohms per square meter. Thus, this application centrally positions the sensor used for optical volumetric imaging to reduce the influence of ambient light on PPG physiological signal measurement, uses glass electrodes to avoid skin irritation, and coats the electrode sheet 141 with a conductive coating on the glass housing 110, balancing high conductivity (surface resistance less than 10 Ω / sq) and biocompatibility to avoid metal allergy problems. In addition, the surface of the electrode sheet 141 can be covered with a hydrophobic coating to reduce the influence of sweat on the skin conductance signal, improving user comfort and device stability.

[0045] In the embodiments of this application, the light emitting unit, the light receiving unit and the electrode sheet 141 are respectively connected to the vital signs monitoring chip, and the vital signs chip is connected to the main control chip of the smart wearable device 100.

[0046] The vital signs monitoring chip includes eight LED driver channels, four optical signal input channels, and one EDA channel. The vital signs monitoring chip can be the ADPD7000 chip from Analog Devices.

[0047] Each LED in the light emitting unit is connected to one of the eight LED driving channels of the vital signs monitoring chip. The light receiving unit is connected to one of the four optical signal input channels of the vital signs monitoring chip. The electrode 141 is connected to the EDA channel. The first light receiver 171 is connected to the first channel of the four optical signal input channels, the second light receiver 172 is connected to the second channel of the four optical signal input channels, the third light receiver 173 and the fourth light receiver 174 are connected to the third channel of the four optical signal input channels, and the fifth light receiver 175 and the sixth light receiver 176 are connected to the fourth channel of the four optical signal input channels.

[0048] The following describes the sensor measurement control of this application. This application can realize high and low power heart rate measurement modes to adapt to different measurement scenarios.

[0049] In low-power heart rate measurement mode, only the first green LED 161 is turned on, and the signal is received by the first light receiver 171 and the second light receiver 172.

[0050] In high-performance heart rate measurement mode, the first green LED 161, the second green LED 162, the third green LED 163 are turned on, and the first optical receiver 171, the second optical receiver 172, the third optical receiver 173, the fourth optical receiver 174, the fifth optical receiver 175 and the sixth optical receiver 176 (PD4) all receive signals.

[0051] In blood oxygen measurement mode: simultaneous transmission and reception form two signals. The first signal: the first red LED 164 and the first infrared LED 165 are activated, and the signal is received by the fifth light receiver 175 and the sixth light receiver 176. The second signal: the second red LED 166 and the second infrared LED 167 are activated, and the signal is received by the third light receiver 173 and the fourth light receiver 174. In blood oxygen mode, red and infrared light are emitted alternately (with a 10ms interval), and the receiving unit synchronously captures both signals, eliminating background noise through differential calculation.

[0052] When measuring electrodermal activity (EDA) signals: two semi-circular electrode plates 141 are used as detection electrodes to acquire EDA signals.

[0053] In the embodiments of this application, the measurement mode can be selected based on the user's operation on the smart wearable device 100 (for example, when the user clicks to perform heart rate measurement on the operation interface of the smart wearable device 100, a high-performance heart rate measurement mode can be used), or the current measurement mode can be automatically analyzed by the smartwatch's main control chip, and the chip automatically configures the LED driving and receiving channels. For example, by analyzing user behavior data (such as exercise state, sleep stage) through machine learning algorithms (such as random forest), the measurement mode can be automatically switched. For example, a low-power mode can be enabled during sleep at night, and a high-performance mode can be switched during exercise. At the same time, the main control chip can adjust the LED driving voltage according to the working mode. For example, in low-power mode, the green LED driving voltage is reduced from 3.3V to 2.8V, reducing energy consumption by 30%.

[0054] This application embodiment integrates PPG and EDA functions on a single chip, utilizing the ADPD7000 chip to support synchronous acquisition of PPG and EDA signals. For example, the PPG signal is input to the chip's four channels through the optical receiving unit, and the EDA signal is input to the EDA channel through electrode plate 141, achieving single-chip multimodal data fusion, reducing hardware complexity and cost. Furthermore, segmented power management can be employed to independently power the LED driver circuit, reducing the impact of current fluctuations on signal acquisition.

[0055] Figure 4 This is a block diagram of a smart wearable device according to an embodiment of the present invention. The smart wearable device 600 may include one or more processors 602, a memory 604, an indicator 606, a wireless communication module 608, a sensor module 610, a motor 612, a button 614, a power management module 616, and a battery 618. These components can communicate through one or more communication buses or signal lines.

[0056] The processor 602 is the core of the smart wearable device 600, responsible for running the operating system and applications, performing various functions and data processing. It may contain one or more interfaces for connecting peripheral devices and transmitting data and instructions.

[0057] The memory 604 stores executable program code, including the operating system, application programs (such as vital sign detection, image playback, etc.), and data generated during use (motion parameters, physiological parameters, wearing status, etc.). The memory can be high-speed random access memory or non-volatile memory, such as disk or flash memory.

[0058] The indicator 606 displays the status of the smart wearable device, such as charging status, battery level changes, messages, missed calls, and notifications. It can be an LED light or a display screen, conveying information through on / off switching and color changes.

[0059] The wireless communication module 608 supports wireless communication between smart wearable devices and networks and other devices (such as mobile phones). It includes components such as an antenna, RF transceiver, amplifier, tuner, oscillator, digital signal processor, and codec chip, enabling cellular mobile communication, short-range wireless communication, wireless internet, and location information services.

[0060] The sensor module 610 is used to measure physical quantities or detect the operating status of the smart wearable device 600. The sensor module 610 may include an accelerometer 610a, a gyroscope 610b, a magnetometer 610c, a biosignal sensor 610d, etc.

[0061] The accelerometer 610a can detect the magnitude of acceleration of the smart wearable device 600 in various directions. When the smart wearable device 600 is stationary, it can detect the magnitude and direction of gravity. The accelerometer 610a can also be used to identify the posture of the smart wearable device 600, and can be applied to pedometers and other applications. The accelerometer 610a can also be used for user gesture recognition, such as recognizing whether the user is waving their hand, to control other devices paired with the smart wearable device 600. In some embodiments, the accelerometer 610a can be combined with the gyroscope sensor 610b to monitor the user's stride length, cadence, and pace during movement.

[0062] The gyroscope sensor 610b can be used to determine the motion posture of the smart wearable device 600. In some embodiments, the gyroscope sensor 610b can determine the angular velocity of the smart wearable device 600 about three axes (i.e., the x, y, and z axes). The accelerometer sensor 610a and the gyroscope sensor 610b can be used individually or in combination to identify the user's motion, such as identifying whether the user is at rest, in a state of slight motion, in a state of moderate-intensity motion, or in a state of high-intensity motion.

[0063] The magnetic sensor 610c includes a Hall sensor or a magnetometer, which can be used to determine the user's location.

[0064] The biosignal sensor 610d is used to measure a user's human biosignals, including but not limited to a PPG sensor, an electrocardiogram sensor, a fingerprint scanning sensor, and a temperature sensor. The biosignal sensor 610d can be a PPG sensor composed of a light emitting unit and a light receiving unit as mentioned in the embodiments of this application, along with electrode pads. The sensor module 610 may also include a control circuit for controlling one or more sensors included in the sensor module 610, such as the vital signs monitoring chip mentioned in the embodiments of this application.

[0065] Motor 612 converts electrical signals into mechanical vibrations for incoming calls, message notifications, and touch feedback. Buttons 614 include a power button, which can be a physical button or a touch button. Battery 618 provides power to all components, and power management module 616 is responsible for charge / discharge management and battery status monitoring (capacity, cycle count, health status, etc.), and supports wired or wireless charging.

[0066] It should be understood that in some embodiments, the smart wearable device 600 may consist of one or more of the aforementioned components. The smart wearable device 600 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0067] In summary, this application provides a matrix arrangement of three light emitting units and six light receiving units in the photoelectric pulse wave sensor area of ​​a smart wearable device. The three emitting units are arranged in a straight line, and the six light receiving units are divided into two groups symmetrical about the line containing the three emitting units. The three emitting units include a first light emitting unit located at the center of the photoelectric pulse wave sensor area, and a second and a third light emitting unit symmetrically arranged about the first light emitting unit. The first light emitting unit includes a first green LED, and the second and third light emitting units respectively include a green LED, a red LED, and an infrared LED.

[0068] Regarding low power consumption, this application places high-power components (such as infrared LEDs) away from the central area. This layout avoids heat concentration affecting sensor stability and also reduces power consumption. Heat concentration leads to performance degradation, requiring components to consume more energy to maintain normal operation. Distributing high-power components effectively avoids this. Furthermore, the distributed layout of the receiving unit reduces thermal crosstalk, further improves signal path consistency, and reduces environmental interference. In a stable signal environment, the controller of the smart wearable device does not need to consume additional energy to process interference signals, thus achieving low-power operation.

[0069] Furthermore, the symmetrical matrix layout of the optical emitting and receiving units ensures a consistent signal path, effectively reducing signal attenuation or interference caused by asymmetrical design. This eliminates the need to compensate for signal loss by increasing transmission power while maintaining signal quality, thus reducing overall power consumption. Positioning the first green LED at the center, with red and infrared LEDs distributed around it, combined with diagonal receiving units (such as the third and fourth optical receivers) to capture the signal, significantly enhances the signal-to-noise ratio (SNR) of blood oxygen measurement. A high SNR means that, under the same measurement accuracy requirements, the transmission power of the optical emitting unit can be reduced, thereby reducing power consumption and achieving the goal of improving blood oxygen measurement performance while maintaining low power consumption.

[0070] Furthermore, since the first green LED is located at the center of the sensor area, this design supports different heart rate measurement modes to balance power consumption and performance. In low-power heart rate measurement mode, only the first green LED and its adjacent light receiving unit can be turned on for heart rate measurement, which minimizes energy consumption and is suitable for use in scenarios with high battery life requirements. In high-performance heart rate measurement mode, all three green LEDs and all light receiving units can be turned on to improve measurement accuracy and meet the needs of scenarios with high requirements for heart rate measurement accuracy.

[0071] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A smart wearable device, characterized in that... ,include: The photoelectric pulse wave sensor area is provided with three light emitting units and six light receiving units arranged in a matrix. The three emitting units are arranged in a straight line, and the six light emitting units are divided into two groups symmetrical about the straight line of the three emitting units. The three emitting units include a first light emitting unit located at the center of the photoelectric pulse wave sensor area, and a second light emitting unit and a third light emitting unit symmetrically arranged about the first light emitting unit. The first light emitting unit includes a first green LED, and the second light emitting unit and the third light emitting unit respectively include a green LED, a red LED and an infrared LED.

2. The smart wearable device according to claim 1, characterized in that... Two semi-annular electrode plates are arranged around the area of ​​the photoelectric pulse wave sensor.

3. The smart wearable device according to claim 1, characterized in that... The second light emitting unit includes a second green LED, a first red LED, and a first infrared LED. The second green LED is positioned close to the first green LED, while the first red LED and the first infrared LED are positioned away from the first green LED. The third light emitting unit includes a third green LED, a second red LED, and a second infrared LED. The third green LED is positioned close to the first green LED, while the second red LED and the second infrared LED are positioned away from the first green LED.

4. The smart wearable device according to claim 2, characterized in that... The optical receiving unit includes: A first optical receiver and a second optical receiver are symmetrically arranged about the first optical emitting unit; The third and fourth optical receivers are symmetrically arranged with respect to the second optical transmitting unit; The fifth and sixth optical receivers are symmetrically arranged with respect to the third optical transmitting unit.

5. The smart wearable device according to claim 4, characterized in that... The light emitting unit, the light receiving unit, and the electrode sheet are respectively connected to the vital signs monitoring chip, and the vital signs monitoring chip is connected to the main control chip of the smart wearable device.

6. The smart wearable device according to claim 5, characterized in that... The vital signs monitoring chip includes 8 LED driver channels, 4 optical signal input channels, and 1 EDA channel. Each LED of the light emitting unit is connected to one of the eight LED driving channels of the vital signs monitoring chip, the light receiving unit is connected to one of the four light signal input channels of the vital signs monitoring chip, and the electrode is connected to the EDA channel.

7. The smart wearable device according to claim 6, characterized in that... The first optical receiver is connected to the first channel of the four optical signal input channels, the second optical receiver is connected to the second channel of the four optical signal input channels, the third and fourth optical receivers are connected to the third channel of the four optical signal input channels, and the fifth and sixth optical receivers are connected to the fourth channel of the four optical signal input channels.

8. The smart wearable device according to claim 2, characterized in that... The smart wearable device includes a glass housing, and the light emitting unit and the light receiving unit are located inside the smart wearable device and are arranged corresponding to the glass housing. The electrode sheet is a conductive coating disposed on the glass shell.

9. The smart wearable device according to claim 8, characterized in that... The conductive coating is an indium tin oxide or graphene composite material with a surface resistance of less than 10 ohms per square meter.

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