A chest-worn sleep-time health monitoring device
By using a sleep health monitoring device with a triaxial accelerometer and photoelectric pulse sensor worn on the chest, the problem of inconvenient monitoring of heart rate and respiratory rate in existing technologies has been solved, enabling accurate monitoring and assessment of autonomic nervous function during sleep. It is suitable for middle-aged and elderly people and those with mild sleep disorders.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN KAIFA TECH
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-03
AI Technical Summary
In existing technologies, heart rate and respiratory rate monitoring devices are inconvenient to use for non-critical patients or the elderly, especially during sleep when they cannot be accurately monitored, and traditional wrist devices are greatly affected by posture pressure and muscle movement.
Design a sleep health monitoring device worn on the chest, which includes a three-axis accelerometer and a photoelectric pulse sensor. Combined with a microcontroller, it can synchronously monitor respiratory rate and heart rate, distinguish respiratory cycles through three-dimensional motion signals, and reduce sleep disturbances caused by turning over.
It achieves accurate monitoring of heart rate and respiratory rate during sleep, is suitable for middle-aged and elderly people and those with mild sleep disorders, provides assessment of autonomic nervous system function and sub-health warning, and is small in size and inexpensive.
Smart Images
Figure CN224441326U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of health monitoring technology, and in particular to a sleep health monitoring device worn on the chest. Background Technology
[0002] In the field of health monitoring, assessing human health by monitoring physiological indicators is a common and important method. Heart rate and respiratory rate are important physiological indicators, and there is a close relationship between them. Under normal physiological conditions, heart rate and respiratory rate show a certain degree of synchronicity, with a ratio of approximately 4:1, which is more pronounced in healthy individuals. However, when the human body is in a state of exercise, emotional excitement, or illness, heart rate and respiratory rate change, causing the above ratio to no longer be maintained. Current technologies for monitoring heart rate and respiratory rate mainly fall into two categories: using large medical equipment in hospitals and wearing smartwatches on the wrist. While some non-critically ill patients or the elderly may have a need to monitor heart rate and respiratory rate during sleep, hospital medical equipment is too expensive and inconvenient to use. Furthermore, when using smartwatches during sleep, wrist posture may compress the watch's sensors, affecting the acquisition of continuous health monitoring data. Additionally, the complexities of wrist muscle movement and vascular distribution can also affect signal acquisition. Compared to wrist-mounted devices, wearing a health monitoring device on the chest makes it easier and more accurate to monitor heart rate and respiratory rate. This is because the heart is located in the middle of the chest cavity, and the rise and fall of the respiratory system are mainly concentrated in the chest. The sensors of the chest-mounted device can be directly close to the heart and lungs, reducing signal transmission distance and interference. Furthermore, the data acquisition will not be affected by posture during sleep. Therefore, there is an urgent need for a sleep health monitoring device that can be worn on the chest. Utility Model Content
[0003] Therefore, it is necessary to address the above-mentioned shortcomings by providing a sleep health monitoring device worn on the chest, comprising a soft shell with a curved surface conforming to the contour of the human chest. The soft shell contains: a triaxial accelerometer for monitoring respiratory rate, a photoelectric pulse sensor for monitoring heart rate, and a microcontroller for calculating respiratory rate and heart rate. The triaxial accelerometer and photoelectric pulse sensor are electrically connected to the microcontroller. The curved surface of the soft shell has through holes, and the triaxial accelerometer and photoelectric pulse sensor are disposed within the through holes with their surfaces flush with the curved surface. The soft shell also has an elastic strap for securing the device to the human chest.
[0004] Preferably, the triaxial accelerometer includes a triaxial accelerometer chip U6, resistors R26, R30, R31, R32, R33, and R37, and capacitors C48, C49, and C55. The triaxial accelerometer chip U6 is a 12-pin chip. Pin 1 of the triaxial accelerometer chip U6 is electrically connected to the microcontroller via resistor R33. Pin 4 of the triaxial accelerometer chip U6 is electrically connected to the microcontroller via resistor R37. Resistors R30 and R31 are connected in parallel with resistor R33, pin 1 of the triaxial accelerometer chip U6, and resistor R37. Pin 2 of the triaxial accelerometer chip U6 is electrically connected to the power supply VDD_ACC via resistor R32. Pin 3 of the triaxial accelerometer chip U6 is electrically connected to the power supply VDD_ACC. Pin 4 of the triaxial accelerometer chip U6 is grounded through capacitor C49. Pins 5 and 6 of the triaxial accelerometer chip U6 are electrically connected and grounded. Pins 7 and 8 of the triaxial accelerometer chip U6 are electrically connected and grounded. Pins 9 and 10 of the triaxial accelerometer chip U6 are electrically connected and electrically connected to the power supply VDD_ACC. Capacitors C48 and C55 are connected in series and in parallel on the line connecting pin 9 of the triaxial accelerometer chip U6 and the power supply VDD_ACC. Pin 12 of the triaxial accelerometer chip U6 is electrically connected to the power supply VDD_ACC through resistor R26. Pin 12 of the triaxial accelerometer chip U6 is electrically connected to the microcontroller.
[0005] Preferably, the photoelectric pulse sensor includes: a photoelectric pulse sensor controller U5 and a PPG module for transmitting and receiving optical signals. The photoelectric pulse sensor controller U5 and the PPG module are electrically connected. The photoelectric pulse sensor controller U5 is used to perform analog-to-digital conversion on the electrical signal and transmit the converted value through I... 2 The C bus transmits data to the microcontroller.
[0006] Preferably, the PPG module includes: a light emitting device SFH7015 capable of emitting light of different wavelengths and a light sensing device SFH2703 capable of converting light signals into electrical signals. The light emitting device SFH7015 and the light sensing device SFH2703 are electrically connected to the photoelectric pulse sensor controller U5. The photoelectric pulse sensor controller U5 is used to control the light emitting device SFH7015 to emit light of different wavelengths, and the photoelectric pulse sensor controller U5 is also used to receive the electrical signals transmitted by the light sensing device SFH2703.
[0007] Preferably, pin D6 of the photoelectric pulse sensor controller U5 is electrically connected to pin 1 of the light emitting device SFH7015, pin F5 of the photoelectric pulse sensor controller U5 is electrically connected to pin 2 of the light emitting device SFH7015, pin E6 of the photoelectric pulse sensor controller U5 is electrically connected to pin 4 of the light emitting device SFH7015, pin 3 of the light emitting device SFH7015 is electrically connected to the power supply VLED, and pin 3 of the light emitting device SFH7015 is connected to capacitor C4. 7. Grounded. The anode of the photosensitive device SFH2703 is electrically connected to pin F1 of the photoelectric pulse sensor controller U5. The cathode of the photosensitive device SFH2703 is electrically connected to pin E1 of the photoelectric pulse sensor controller U5. Pins C4 and C5 of the photoelectric pulse sensor controller U5 are electrically connected and simultaneously electrically connected to the power supply VDD_PPG. Pins C6 and C7 of the photoelectric pulse sensor controller U5 are electrically connected and simultaneously grounded. Pin E3 of the photoelectric pulse sensor controller U5 is grounded.
[0008] Preferably, the microcontroller includes a central processing unit (CPU) U1, a power supply circuit, a clock and timing circuit, and a test circuit. Pin 11 of the CPU U1 is electrically connected to pin 12 of the triaxial accelerometer chip U6. Pin 14 of the CPU U1 is electrically connected to pin 1 of the triaxial accelerometer chip U6 through resistor R33. Pin 15 of the CPU U1 is electrically connected to pin 4 of the triaxial accelerometer chip U6 through resistor R37. Pin 50 of the CPU U1 is electrically connected to pin A5 of the photoelectric pulse sensor controller U5. Pin 49 of the CPU U1 is electrically connected to pin B7 of the photoelectric pulse sensor controller U5. Pin 51 of the CPU U1 is electrically connected to pin A7 of the photoelectric pulse sensor controller U5. Pin 53 of the CPU U1 is electrically connected to pin D3 of the photoelectric pulse sensor controller U5.
[0009] Preferably, the power supply circuit includes: resistor R1, ferrite bead FB1, ferrite bead FB2, capacitors C1, C2, C3, C4, C5, C6, C7, and C8. Pin 1 of the central processing unit U1 is electrically connected to power supply VDD_1P0 through ferrite bead FB2. Pin 1 of the central processing unit U1 is grounded through capacitor C7. Pin 54 of the central processing unit U1 is electrically connected to power supply VDD_1P0 and grounded through capacitor C3. Pin 23 of the central processing unit U1 is grounded through capacitor C4. Pin 27 of the central processing unit U1 is electrically connected to power supply VDD_3V3 through resistor R1. The CPU U1 has pin 27 electrically connected to the power supply VDD_MCU, and pin 27 is grounded through capacitor C1. The CPU U1 has pin 23 electrically connected to pin 27 through ferrite bead FB1, and pin 23 is grounded through capacitor C2. Capacitor C6 is connected in parallel with capacitor C2. The CPU U1 also has pin 17 electrically connected to the power supply VDD_MCU, and pin 17 is grounded through capacitor C5. Pin 17 is electrically connected to pin 22 of the CPU U1, and capacitor C8 is connected in parallel with capacitor C5.
[0010] Preferably, the clock and timing circuit includes: capacitors C61, C62, C63, and C64; a four-terminal quartz crystal resonator Y1; and a two-terminal quartz crystal resonator Y2. Pin 29 of the central processing unit U1 is grounded through capacitor C61, and pin 28 of the central processing unit U1 is grounded through capacitor C62. The two-terminal quartz crystal resonator Y2 is connected in parallel with pins 29 and 28 of the central processing unit U1. Pin 55 of the central processing unit U1 is grounded through capacitor C63, and pin 56 of the central processing unit U1 is grounded through capacitor C64. Pins 1 and 3 of the four-terminal quartz crystal resonator Y1 are connected in parallel with pins 55 and 56 of the central processing unit U1, and pins 2 and 4 of the four-terminal quartz crystal resonator Y1 are grounded.
[0011] Preferably, the test circuit includes: a resistor R5 and a capacitor C15. The central processing unit U1 has a test point TP2 on its pin 21. The central processing unit U1's pin 21 is electrically connected to the power supply VDD_MCU through the resistor R5. The central processing unit U1's pin 21 is grounded through the capacitor C15. The central processing unit U1's pins 35, 57, and 26 are electrically connected to the grounded end of the capacitor C15.
[0012] The aforementioned chest-worn sleep health monitoring device captures real-time three-dimensional motion signals of chest rise and fall using a three-axis accelerometer. Combined with photoplethysmography (PPG) technology from a photoelectric pulse sensor, it achieves synchronous monitoring of respiratory rate and heart rate. The device distinguishes between the respiratory cycle and body movement using the body motion signals from the three-axis accelerometer, reducing interference from factors such as tossing and turning in sleep. The 4:1 synchronicity analysis of heart rate and respiratory rate helps determine the state of autonomic nervous system function, providing basic data for sleep quality assessment and sub-health early warning. It is particularly suitable for daily health management of middle-aged and elderly people and those with mild sleep disorders. This health monitoring device is compact and worn on the chest, avoiding the bulkiness of traditional medical devices and the instability of wrist-worn monitoring devices. It is suitable for everyday sleep scenarios, is inexpensive, and meets the needs of daily health monitoring. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of a sleep health monitoring device worn on the chest according to one embodiment of the present invention.
[0014] Figure 2 This is a circuit diagram of a triaxial accelerometer sensor for a sleep health monitoring device worn on the chest, according to one embodiment of the present invention.
[0015] Figure 3 This is a circuit diagram of the photoelectric pulse sensor (photoelectric pulse sensor controller U5 part) of a sleep health monitoring device worn on the chest in one embodiment of the present invention.
[0016] Figure 4 This is a circuit diagram (PPG module part) of a photoelectric pulse sensor of a sleep health monitoring device worn on the chest in one embodiment of the present invention.
[0017] Figure 5 This is a circuit diagram of the microcontroller of a sleep health monitoring device worn on the chest according to one embodiment of the present invention;
[0018] Figure 6 for Figure 5 Circuit diagram of the amplified power supply circuit for the microcontroller in region A;
[0019] Figure 7 for Figure 5 Circuit diagram of the microcontroller clock and timing circuit amplification in region B;
[0020] Figure 8 for Figure 5 Circuit diagram of the amplified microcontroller test circuit in the C region;
[0021] Figure 9 This is a schematic diagram of a sleep health monitoring device worn on the chest in one embodiment of the present invention. Detailed Implementation
[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0023] This utility model discloses a sleep health monitoring device worn on the chest, such as... Figures 1-9 As shown, it includes: a soft outer shell with a curved surface conforming to the contour of the human chest; inside the soft outer shell are: a triaxial accelerometer for monitoring respiratory rate, a photoelectric pulse sensor for monitoring heart rate, and a microcontroller for calculating respiratory rate and heart rate; the triaxial accelerometer and photoelectric pulse sensor are electrically connected to the microcontroller; the curved surface of the soft outer shell has through holes, and the triaxial accelerometer and photoelectric pulse sensor are disposed within the through holes with their surfaces flush with the curved surface; the soft outer shell also has an elastic strap for fixing the device to the human chest. When using the sleep health monitoring device worn on the chest provided by this utility model, such as... Figure 9 As shown, the health monitoring device is worn on the chest using an elastic strap. When the user breathes, the chest will show periodic rise and fall. The three-axis accelerometer senses the displacement and acceleration changes of the chest rise and fall on the X, Y, and Z axes during human breathing and collects the above data information. Then, this data is converted into electrical signals and transmitted to the microcontroller. The photoelectric pulse sensor obtains pulse wave signals by emitting and receiving light signals, and transmits them to the microcontroller after processing. The microcontroller calculates and analyzes the received signals to obtain respiratory rate and heart rate data.
[0024] This invention provides a chest-worn sleep health monitoring device that captures real-time three-dimensional motion signals (X / Y / Z axis displacement changes) of chest rise and fall using a triaxial accelerometer. Combined with photoplethysmography (PPG) technology from a photoelectric pulse sensor, it achieves synchronous monitoring of respiratory rate and heart rate. The device distinguishes between the respiratory cycle and body movement through the body motion signals from the triaxial accelerometer, reducing interference from factors such as sleep tossing and turning. The 4:1 synchronicity analysis of heart rate and respiratory rate can assist in assessing the state of autonomic nervous system function, providing basic data for sleep quality evaluation and sub-health early warning. It is particularly suitable for daily health management of middle-aged and elderly people and those with mild sleep disorders. This health monitoring device is compact and worn on the chest, avoiding the bulkiness of traditional medical devices and the instability of wrist-worn monitoring devices. It is suitable for everyday sleep use. For users who need to monitor heart rate and respiratory rate during sleep without using expensive medical equipment, it is not only inexpensive but also meets their daily health monitoring needs.
[0025] In one embodiment, such as Figure 2 The circuit diagram of the triaxial accelerometer is detailed below. The triaxial accelerometer includes: a triaxial accelerometer chip U6, resistors R26, R30, R31, R32, R33, and R37, and capacitors C48, C49, and C55. The triaxial accelerometer chip U6 is a 12-pin chip. Pin 1 of chip U6 is electrically connected to the microcontroller via resistor R33, and pin 4 of chip U6 is electrically connected to the microcontroller via resistor R37. Resistors R30 and R31 are connected in parallel with resistor R33, pin 1 of chip U6, and resistor R37. Pin 2 of chip U6 is electrically connected to the power supply VDD_ACC via resistor R32, pin 3 of chip U6 is electrically connected to the power supply VDD_ACC, pin 4 of chip U6 is grounded via capacitor C49, pins 5 and 6 of chip U6 are electrically connected and grounded, and pins 7 and 8 of chip U6 are electrically connected and grounded. Capacitors C48 and C55 are connected in series and in parallel on the line connecting pin 9 of chip U6 and the power supply VDD_ACC. Pins 9 and 10 of chip U6 are electrically connected, and pin 12 of chip U6 is electrically connected to the power supply VDD_ACC through resistor R26. Pin 12 of chip U6 is also electrically connected to the microcontroller. This circuit design can stably transmit the breathing signal acquired by the triaxial accelerometer, providing reliable data for the microcontroller to accurately calculate the respiratory rate.
[0026] In one embodiment, such as Figure 3 , Figure 4As shown, the photoelectric pulse sensor includes: a photoelectric pulse sensor controller U5 and a PPG module (Photoplethysmography, a physiological signal detection module based on photoplethysmography). The photoelectric pulse sensor controller U5 is electrically connected to the PPG module and is used to convert the electrical signal from analog to digital, and then transmits it through I... 2 The C-bus transmits data to the microcontroller. The PPG module includes a light emitter SFH7015 and a light sensor SFH2703. The SFH7015 emits light of different wavelengths, and the SFH2703 converts the light signal into an electrical signal. Both are electrically connected to the photoelectric pulse sensor controller U5. During operation, the controller U5 controls the SFH7015 to emit light. After the light hits the skin and is reflected, the SFH2703 receives the reflected light and converts it into an electrical signal. This signal is then processed by the controller U5 and transmitted to the microcontroller to calculate the heart rate.
[0027] This embodiment, based on the previous embodiment, further clarifies the circuit connection of the photoelectric pulse sensor. For example... Figure 4 As shown, pin D6 of the photoelectric pulse sensor controller U5 is electrically connected to pin 1 of the SFH7015 light emitting device; pin F5 of controller U5 is electrically connected to pin 2 of the SFH7015 light emitting device; and pin E6 of controller U5 is electrically connected to pin 4 of the SFH7015 light emitting device. Pin 3 of the SFH7015 light emitting device is electrically connected to the power supply VLED, and pin 3 of the SFH7015 light emitting device is grounded through capacitor C47. The anode of the photosensitive device SFH2703 is electrically connected to pin F1 of the photoelectric pulse sensor controller U5, and the cathode is electrically connected to pin E1 of the controller U5. Pins C4 and C5 of the photoelectric pulse sensor controller U5 are electrically connected and simultaneously connected to the power supply VDD_PPG; pins C6 and C7 of controller U5 are electrically connected and simultaneously grounded; and pin E3 of controller U5 is grounded. This circuit ensures stable transmission and processing of light emission and reception signals.
[0028] In one embodiment, such as Figure 5As shown, the microcontroller includes a central processing unit (CPU) U1, a power supply circuit, a clock and timing circuit, and a test circuit. Pin 11 of the CPU U1 is electrically connected to pin 12 of the triaxial accelerometer chip. Pin 14 of the CPU U1 is electrically connected to pin 1 of the triaxial accelerometer chip U6 through resistor R33. Pin 15 of the CPU U1 is electrically connected to pin 4 of the triaxial accelerometer chip U6 through resistor R37. Pin 50 of the CPU U1 is electrically connected to pin A5 of the photoelectric pulse sensor controller U5. Pin 49 of the CPU U1 is electrically connected to pin B7 of the photoelectric pulse sensor controller U5. Pin 51 of the CPU U1 is electrically connected to pin A7 of the photoelectric pulse sensor controller U5. Pin 53 of the CPU U1 is electrically connected to pin D3 of the photoelectric pulse sensor controller U5.
[0029] In one embodiment, such as Figure 6 As shown, the power supply circuit includes resistors R1, ferrite beads FB1 and FB2, and capacitors C1, C2, C3, C4, C5, C6, C7, and C8. Pin 1 of the CPU U1 is electrically connected to power supply VDD_1P0 via ferrite bead FB2, and pin 1 of the CPU U1 is grounded via capacitor C7. Pin 54 of the CPU U1 is electrically connected to power supply VDD_1P0, and pin 54 of the CPU U1 is grounded via capacitor C3. Pin 23 of the CPU U1 is grounded via capacitor C4. Pin 27 of the CPU U1 is electrically connected to power supply VDD_3V3 via resistor R1, and simultaneously connected to power supply VDD_MCU, and pin 27 of the CPU U1 is grounded via capacitor C1. Pin 23 of the CPU U1 is electrically connected to pin 27 of the CPU U1 via ferrite bead FB1, and pin 23 of the CPU U1 is grounded via capacitor C2. Capacitor C6 is connected in parallel with capacitor C2. Pin 17 of the CPU U1 is electrically connected to the power supply VDD_MCU, and pin 17 of the CPU U1 is grounded through capacitor C5. Pin 17 of the CPU U1 is also electrically connected to pin 22 of the CPU U1. Capacitor C8 is connected in parallel with capacitor C5. This power supply circuit provides a stable operating voltage for the microcontroller.
[0030] In one embodiment, such as Figure 7As shown, the clock and timing circuit includes capacitors C61, C62, C63, and C64, a four-terminal quartz crystal resonator Y1, and a two-terminal quartz crystal resonator Y2. Pin 29 of the CPU U1 is grounded through capacitor C61, and pin 28 of the CPU U1 is grounded through capacitor C62. The two-terminal quartz crystal resonator Y2 is connected in parallel with pins 29 and 28 of the CPU U1. Pin 55 of the CPU U1 is grounded through capacitor C63, and pin 56 of the CPU U1 is grounded through capacitor C64. Pins 1 and 3 of the four-terminal quartz crystal resonator Y1 are connected in parallel with pins 55 and 56 of the CPU U1, and pins 2 and 4 of Y1 are grounded. This circuit provides a precise clock signal to the microcontroller, ensuring the timing accuracy of data processing.
[0031] In one embodiment, such as Figure 8 As shown, the test circuit includes resistor R5 and capacitor C15. Pin 21 of the CPU U1 has a test point TP2. Pin 21 of the CPU U1 is electrically connected to the power supply VDD_MCU through resistor R5, and pin 21 of the CPU U1 is grounded through capacitor C15. Pins 35, 57, and 26 of the CPU U1 are electrically connected to the grounded end of capacitor C15. This test circuit facilitates the debugging and fault detection of the microcontroller.
[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0033] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A sleep health monitoring device worn on the chest, characterized in that, The device includes a soft outer shell with a curved surface that conforms to the contour of the human chest. Inside the soft outer shell are a triaxial accelerometer for monitoring respiratory rate, a photoelectric pulse sensor for monitoring heart rate, and a microcontroller for calculating respiratory rate and heart rate. The triaxial accelerometer and photoelectric pulse sensor are electrically connected to the microcontroller. The curved surface of the soft outer shell has through holes, and the triaxial accelerometer and photoelectric pulse sensor are disposed in the through holes with their surfaces flush with the curved surface. The soft outer shell also has an elastic strap for fixing the device to the human chest.
2. The sleep health monitoring device worn on the chest of claim 1, wherein, The triaxial accelerometer includes a triaxial accelerometer chip U6, resistors R26, R30, R31, R32, R33, and R37, and capacitors C48, C49, and C55. The triaxial accelerometer chip U6 is a 12-pin chip. Pin 1 of the triaxial accelerometer chip U6 is electrically connected to the microcontroller via resistor R33. Pin 4 of the triaxial accelerometer chip U6 is electrically connected to the microcontroller via resistor R37. Resistors R30 and R31 are connected in parallel with resistor R33, pin 1 of the triaxial accelerometer chip U6, and resistor R37. Pin 2 of the triaxial accelerometer chip U6 is electrically connected to the power supply VDD_ACC via resistor R32.
3. The triaxial accelerometer chip U6 is electrically connected to the power supply VDD_ACC. Pin 4 of the triaxial accelerometer chip U6 is grounded through the capacitor C49. Pins 5 and 6 of the triaxial accelerometer chip U6 are electrically connected and grounded. Pins 7 and 8 of the triaxial accelerometer chip U6 are electrically connected and grounded. Pins 9 and 10 of the triaxial accelerometer chip U6 are electrically connected and electrically connected to the power supply VDD_ACC. Capacitors C48 and C55 are connected in series and in parallel on the line connecting pin 9 of the triaxial accelerometer chip U6 and the power supply VDD_ACC. Pin 12 of the triaxial accelerometer chip U6 is electrically connected to the power supply VDD_ACC through the resistor R26. Pin 12 of the triaxial accelerometer chip U6 is electrically connected to the microcontroller.
3. The chest worn sleep health monitoring device of claim 1, wherein, The photoelectric pulse sensor includes: a photoelectric pulse sensor controller U5 and a PPG module for transmitting and receiving optical signals. The photoelectric pulse sensor controller U5 and the PPG module are electrically connected. The photoelectric pulse sensor controller U5 is used to perform analog-to-digital conversion on the electrical signal and transmit the converted value through I... 2 The C bus transmits data to the microcontroller.
4. The chest worn sleep health monitoring device of claim 3, wherein, The PPG module includes: an optical emitting device SFH7015 capable of emitting light of different wavelengths and an optical sensing device SFH2703 capable of converting optical signals into electrical signals. The optical emitting device SFH7015 and the optical sensing device SFH2703 are electrically connected to the photoelectric pulse sensor controller U5. The photoelectric pulse sensor controller U5 is used to control the optical emitting device SFH7015 to emit light of different wavelengths, and the photoelectric pulse sensor controller U5 is also used to receive the electrical signals transmitted by the optical sensing device SFH2703.
5. The chest worn sleep health monitoring device of claim 4, wherein, Pin D6 of the photoelectric pulse sensor controller U5 is electrically connected to pin 1 of the light emitting device SFH7015; pin F5 of the photoelectric pulse sensor controller U5 is electrically connected to pin 2 of the light emitting device SFH7015; pin E6 of the photoelectric pulse sensor controller U5 is electrically connected to pin 4 of the light emitting device SFH7015; pin 3 of the light emitting device SFH7015 is electrically connected to the power supply VLED; and pin 3 of the light emitting device SFH7015 is grounded through capacitor C47. The anode of the photosensitive device SFH2703 is electrically connected to pin F1 of the photoelectric pulse sensor controller U5, the cathode of the photosensitive device SFH2703 is electrically connected to pin E1 of the photoelectric pulse sensor controller U5, pins C4 and C5 of the photoelectric pulse sensor controller U5 are electrically connected and simultaneously electrically connected to the power supply VDD_PPG, pins C6 and C7 of the photoelectric pulse sensor controller U5 are electrically connected and simultaneously grounded, and pin E3 of the photoelectric pulse sensor controller U5 is grounded.
6. The chest worn sleep health monitoring device of claim 5, wherein, The microcontroller includes a central processing unit (CPU) U1, a power supply circuit, a clock and timing circuit, and a test circuit. Pin 11 of the CPU U1 is electrically connected to pin 12 of the triaxial accelerometer chip U6. Pin 14 of the CPU U1 is electrically connected to pin 1 of the triaxial accelerometer chip U6 through resistor R33. Pin 15 of the CPU U1 is electrically connected to pin 4 of the triaxial accelerometer chip U6 through resistor R37. Pin 50 of the CPU U1 is electrically connected to pin A5 of the photoelectric pulse sensor controller U5. Pin 49 of the CPU U1 is electrically connected to pin B7 of the photoelectric pulse sensor controller U5. Pin 51 of the CPU U1 is electrically connected to pin A7 of the photoelectric pulse sensor controller U5. Pin 53 of the CPU U1 is electrically connected to pin D3 of the photoelectric pulse sensor controller U5.
7. The chest worn sleep health monitoring device of claim 6, wherein, The power supply circuit includes: resistor R1, ferrite bead FB1, ferrite bead FB2, capacitors C1, C2, C3, C4, C5, C6, C7, and C8. Pin 1 of the central processing unit U1 is electrically connected to power supply VDD_1P0 through ferrite bead FB2. Pin 1 of the central processing unit U1 is grounded through capacitor C7. Pin 54 of the central processing unit U1 is electrically connected to power supply VDD_1P0 and grounded through capacitor C3. Pin 23 of the central processing unit U1 is grounded through capacitor C4. Pin 27 of the central processing unit U1 is electrically connected to power supply VDD_3V3 through resistor R1. Pin 27 of the central processing unit U1 is electrically connected to the power supply VDD_MCU. Pin 27 of the central processing unit U1 is grounded through capacitor C1. Pin 23 of the central processing unit U1 is electrically connected to pin 27 of the central processing unit U1 through ferrite bead FB1. Pin 23 of the central processing unit U1 is grounded through capacitor C2. Capacitor C6 is connected in parallel with capacitor C2. Pin 17 of the central processing unit U1 is electrically connected to the power supply VDD_MCU. Pin 17 of the central processing unit U1 is grounded through capacitor C5. Pin 17 of the central processing unit U1 is electrically connected to pin 22 of the central processing unit U1. Capacitor C8 is connected in parallel with capacitor C5.
8. The chest worn sleep health monitoring device of claim 6, wherein, The clock and timing circuit includes: capacitors C61, C62, C63, and C64; a four-terminal quartz crystal resonator Y1; and a two-terminal quartz crystal resonator Y2. Pin 29 of the central processing unit U1 is grounded through capacitor C61, and pin 28 of the central processing unit U1 is grounded through capacitor C62. The two-terminal quartz crystal resonator Y2 is connected in parallel with pins 29 and 28 of the central processing unit U1. Pin 55 of the central processing unit U1 is grounded through capacitor C63, and pin 56 of the central processing unit U1 is grounded through capacitor C64. Pins 1 and 3 of the four-terminal quartz crystal resonator Y1 are connected in parallel with pins 55 and 56 of the central processing unit U1, and pins 2 and 4 of the four-terminal quartz crystal resonator Y1 are grounded.
9. The chest worn sleep health monitoring device of claim 6, wherein, The test circuit includes: resistor R5 and capacitor C15. The central processing unit U1 has a test point TP2 on pin 21. The central processing unit U1 pin 21 is electrically connected to the power supply VDD_MCU through resistor R5. The central processing unit U1 pin 21 is grounded through capacitor C15. The central processing unit U1 pins 35, 57, and 26 are electrically connected to the grounded end of capacitor C15.