Sleep body position and posture sensor
The sleep posture sensor, composed of a triaxial accelerometer and a microprocessor, solves the problem of high power consumption in existing technologies, achieving low power consumption and high accuracy in sleep posture detection, thus improving wearing comfort.
Patent Information
- Application Number
- CN202422952298.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-02
AI Technical Summary
Existing methods for detecting changes in human sleep posture suffer from high power consumption.
A sleep posture sensor, consisting of a triaxial accelerometer, a microprocessor, and a control field-effect transistor, detects sleep posture by detecting acceleration data in each axis, calculating Euler angle data, and converting it into resistance values for output.
It achieves microampere-level power consumption, improving the accuracy of sleep posture determination and the user's wearing comfort.
Smart Images
Figure CN223667944U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of medical monitoring, in particular to a sleep body position sensor. BACKGROUND
[0002] It has great clinical research significance to obtain the change of sleep posture of a person when sleeping, and the change of sleep posture is very helpful for the assessment of sleep quality of people and the research of some potential diseases.
[0003] At present, there are many means to detect the change of sleep posture of a person when sleeping, including directly recording through a camera, installing a tilt sensor on the human body, etc.
[0004] However, the above methods have the problem of relatively large power consumption. CONTENT OF THE UTILITY MODEL
[0005] Therefore, it is necessary to provide a sleep body position sensor to solve the problem of relatively large power consumption in the prior art.
[0006] In order to solve the above problems, the present application provides a sleep body position sensor, comprising:
[0007] a shell for fixing on a human body, a circuit board arranged in the shell, and a three-axis acceleration sensor, a microprocessor and a control field effect tube arranged on the circuit board and electrically connected in sequence; the three-axis acceleration sensor is used to detect the axial acceleration data of the body position posture of the user; the microprocessor is used to calculate the Euler angle data of the body position posture of the user according to the axial acceleration data; and the control field effect tube is used to convert the Euler angle data into resistance value output.
[0008] In some possible implementation manners, a band for fixing on a human body is arranged on the shell.
[0009] In some possible implementation manners, the band adopts the form of magic tape or belt buckle.
[0010] In some possible implementation manners, the shell is fixed on the band through magic tape.
[0011] In some possible implementation manners, the model of the three-axis acceleration sensor is ADXL362.
[0012] In some possible implementation manners, the model of the microprocessor is STM32L431CBT6.
[0013] In some possible implementation manners, the control field effect tube comprises a field effect tube Q1, a field effect tube Q2, a field effect tube Q3, a field effect tube Q4 and a field effect tube Q5.
[0014] The pin PB10 of the microprocessor is connected with the gate of the field effect tube Q1, used for controlling the resistance value output when lying on the left side.
[0015] The pin PB11 of the microprocessor is connected with the gate of the field effect tube Q2, used for controlling the resistance value output when lying on the back.
[0016] The pin PB12 of the microprocessor is connected with the gate of the field effect tube Q3, used for controlling the resistance value output when lying on the right side.
[0017] The pin PB13 of the microprocessor is connected with the gate of the field effect tube Q4, used for controlling the resistance value output when lying on the stomach.
[0018] The pin PB14 of the microprocessor is connected with the gate of the field effect tube Q5, used for controlling the resistance value output when sitting.
[0019] In some possible implementation manners, a battery electrically connected with the circuit board is further arranged in the shell.
[0020] In some possible implementation manners, the battery is a CR2032 lithium ion battery.
[0021] In some possible implementation manners, the shell is fixed to the chest and abdomen of the human body.
[0022] The application has the following beneficial effects: the sleep body position sensor provided by the application is worn on the user when in use, when the user is in a certain body position, the three-axis acceleration sensor detects the axial acceleration data of the body position of the user, then the microprocessor calculates the Euler angle data of the body position of the user according to the axial acceleration data, then the field effect tube converts the Euler angle data into resistance value output, different resistance values are output to indicate five sleep body positions of lying on the left side, lying on the back, lying on the right side, lying on the stomach and sitting, finally, the terminal only needs to judge the resistance value to realize the detection of the sleep body position; the microprocessor and the digital acceleration sensor with ultra-low power consumption can realize micro-ampere power consumption, the energy consumption is less, and the small size design can improve the wearing comfort of the user and the accuracy of the sleep body position determination. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 The sleep body position sensor provided by the application is provided with a structure schematic diagram;
[0024] Figure 2 The circuit diagram of the circuit board provided by the application is provided;
[0025] Figure 3 The three-axis acceleration sensor body position coordinate system schematic diagram provided by the application is provided;
[0026] Figure 4A schematic diagram of the body position angle range provided in this application;
[0027] Figure 5 The power consumption test diagram provided in this application;
[0028] In the picture, 1-outer shell, 2-Hook and loop fastener, 3-strap, 4-wire. Detailed Implementation
[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0030] It should be understood that the illustrative drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may be implemented out of order, and steps without logical contextual relationships may be reversed or performed simultaneously. Furthermore, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor systems and / or microcontroller systems.
[0031] The terms "first," "second," etc., used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a technical feature specified with "first" or "second" may explicitly or implicitly include at least one of those features. "And / or" describes the relationship between related objects, indicating that three relationships may exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone.
[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0033] This application provides a sleep posture sensor, the structure of which is as follows: Figure 1 As shown, it includes: a housing 1 fixed to the human body, a circuit board disposed inside the housing 1, and a triaxial accelerometer, a microprocessor, and a control field-effect transistor disposed on the circuit board and electrically connected in sequence.
[0034] like Figure 1 As shown, the dimensions of the shell 1 are 29mm in length, 22mm in width, and 12mm in height. The shell is small in size and comfortable to wear. In addition, the shell is made of ABS plastic.
[0035] like Figure 2 As shown, the triaxial accelerometer is model ADXL362 digital triaxial accelerometer, used to detect acceleration data along each axis of the user's posture. The triaxial accelerometer's coordinate system is as follows: Figure 3 As shown;
[0036] like Figure 2 As shown, the microprocessor is an STM32L431CBT6. Pin PA1 of the microprocessor is connected to the SCLK pin of the triaxial accelerometer to provide the operating clock signal. Pin PB0 of the microprocessor is connected to the #CS pin of the triaxial accelerometer's SPI communication chip select signal. Pins PA6 and PA7 of the microprocessor are connected to the MISO and MOSI pins of the triaxial accelerometer's SPI communication to receive acceleration data for each axis transmitted by the triaxial accelerometer. Pins PA0 and PA2 of the microprocessor are connected to the INT0 and INT1 pins of the triaxial accelerometer's interrupt configuration pins to configure accelerometer interrupts and as microprocessor wake-up interrupts.
[0037] Therefore, the microprocessor calculates Euler angle data for the user's posture based on the acceleration data along each axis. The Euler angle data includes pitch and roll angles, such as... Figure 4 As shown; when the pitch angle is between +65° and +90°, or between -65° and -90°, it is a sitting position; when the pitch angle is between -65° and +65°, and the roll angle is between -25° and +25°, it is a supine position; when the roll angle is between +65° and +115°, it is a right lateral decubitus position; when the roll angle is between -65° and -115°, it is a right lateral decubitus position; the remaining angle range is a prone position.
[0038] like Figure 2As shown, the control field-effect transistors include field-effect transistors Q1, Q2, Q3, Q4, and Q5. Pin PB10 of the microprocessor is connected to the gate of field-effect transistor Q1 to control the output of a 25KΩ resistor when lying on the left side; pin PB11 of the microprocessor is connected to the gate of field-effect transistor Q2 to control the output of a 50KΩ resistor when lying on the back; pin PB12 of the microprocessor is connected to the gate of field-effect transistor Q3 to control the output of a 100KΩ resistor when lying on the right side; pin PB13 of the microprocessor is connected to the gate of field-effect transistor Q4 to control the output of a 200KΩ resistor when lying on the stomach; and pin PB14 of the microprocessor is connected to the gate of field-effect transistor Q5 to control the output of a 500KΩ resistor when sitting.
[0039] In addition, such as Figure 1 As shown, the circuit board is also provided with a wire 4 that is electrically connected to the control field-effect transistor. The wire 4 extends out from the bottom of the housing 1 and is used to transmit the resistance value to the external terminal.
[0040] Compared with existing technologies, the sleep posture sensor of this application is worn by the user. When the user is in a certain posture, the triaxial accelerometer detects the acceleration data of each axis of the user's posture. Then, the microprocessor calculates the Euler angle data of the user's posture based on the acceleration data of each axis. Next, the control field-effect transistor converts the Euler angle data into a resistance value output. By outputting different resistance values, five sleep postures are indicated: left lateral, supine, right lateral, prone, and sitting. Finally, the terminal only needs to judge the resistance value to realize the detection of sleep posture. The use of ultra-low power microprocessor and digital accelerometer can achieve microampere-level power consumption, with low energy consumption. At the same time, the small size design can improve the user's wearing comfort and accurately determine the sleep posture.
[0041] To facilitate fixing the shell 1 to the human body, in some embodiments, such as Figure 1 As shown, the casing 1 is provided with a strap 3, which is tied around the user's chest and abdomen. In addition, the strap 3 is 120cm long and is made of Velcro or belt buckle, so the length can be adjusted.
[0042] Furthermore, to facilitate securing the housing 1 to the strap 3, in some embodiments, such as Figure 1 As shown, the bottom of the shell 1 has Velcro 2, which is used to fix the shell 1 to the strap 3. The Velcro 2 is 12cm long and 2cm wide.
[0043] For ease of use, in some embodiments, a battery for powering the circuit board is also provided inside the housing 1. The power supply battery is a CR2032 lithium-ion battery manufactured by Shenzhen Qite Electronics Co., Ltd., with a nominal capacity of 240mAh.
[0044] Therefore, the hardware circuit and software of the present application adopt low power consumption processing, when the sensor is in a static state, the average power consumption is 3.5uA, and when the sensor is in a motion state, the average power consumption is 36uA, as shown in the figure; according to the calculation of 15 hours of daily motion state use time, the battery capacity is 240mAh, and the continuous use time can be more than 14 months. Figure 5
[0045] The above describes in detail a sleep body position sensor provided by the present application, and the principles and implementation modes of the present application are described by applying specific examples; the above example is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range can be changed, and the above description should not be understood as a limitation of the present application.
[0046] The above describes only the preferred specific implementation mode of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A sleep position posture sensor, characterized by, The application relates to a shell for fixing on a human body, a circuit board arranged in the shell, and a three-axis acceleration sensor, a microprocessor and a control field effect tube arranged on the circuit board and electrically connected in sequence; the three-axis acceleration sensor is used for detecting axial acceleration data of a user's body position posture; the microprocessor is used for calculating Euler angle data of the user's body position posture according to the axial acceleration data; and the control field effect tube is used for converting the Euler angle data into resistance value output. A bandage for fixing on the human body is arranged on the shell.
2. The sleep position posture sensor of claim 1, wherein, The bandage is in the form of Velcro or a belt buckle.
3. The sleep position posture sensor of claim 2, wherein, The shell is fixed on the bandage through Velcro.
4. The sleep position posture sensor of claim 2, wherein, The three-axis acceleration sensor is ADXL362 digital three-axis acceleration sensor.
5. The sleep position posture sensor of claim 1, wherein, The microprocessor is STM32L431CBT6.
6. The sleep position posture sensor of claim 1, wherein, The control field effect tube comprises field effect tubes Q1, Q2, Q3, Q4 and Q5.
7. The sleep position posture sensor of claim 1 or 6, wherein, The pin PB10 of the microprocessor is connected with the gate of the field effect tube Q1 and is used for controlling resistance value output when lying on the left side. The pin PB11 of the microprocessor is connected with the gate of the field effect tube Q2 and is used for controlling resistance value output when lying on the back. The pin PB12 of the microprocessor is connected with the gate of the field effect tube Q3 and is used for controlling resistance value output when lying on the right side. The pin PB13 of the microprocessor is connected with the gate of the field effect tube Q4 and is used for controlling resistance value output when lying on the stomach. The pin PB14 of the microprocessor is connected with the gate of the field effect tube Q5 and is used for controlling resistance value output when sitting. A battery electrically connected with the circuit board is further arranged in the shell.
8. The sleep position posture sensor of claim 1, wherein, The battery is CR2032 lithium ion battery.
9. The sleep position posture sensor of claim 8, wherein, The shell is fixed on the chest and abdomen of the human body.
10. The sleep position posture sensor of claim 1, wherein,