Sleep monitoring device based on piezoelectric sensor and sleep monitoring method thereof

Abstract

According to the sleep monitoring device based on the piezoelectric sensor and the sleep monitoring method of the sleep monitoring device, mattress type non-load sleep monitoring is achieved through the piezoelectric sensor array, pressure changes caused by central pulse rhythm, breathing and body movement in the sleep process are measured in a non-contact mode in the natural sleep state, the sleep habit is not changed, and the sleep monitoring effect is good. The low-load sleep monitoring method is an ideal low-load sleep monitoring method and has a more general application scene. The scheme not only realizes no load of the user, but also can extract data such as heart rate, respiration rate and body movement after digital signal processing, realizes detection of parameters such as center rate, respiration and body movement in the no-load sleep process and sleep quality evaluation, can be used for sleep quality evaluation of common people, can also be applied to other fields, and has wide application prospects. The method comprises the steps of exercise heart rate monitoring, medical pulse monitoring, sleep quality monitoring in daily training of astronauts and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of sleep monitoring, and in particular to a sleep monitoring device based on a piezoelectric sensor and a sleep monitoring method thereof. Background Art

[0002] Sleep monitoring is an indispensable part of modern medical diagnosis. Currently, clinical sleep assessment generally uses a full-night polysomnogram (PSG) (including EEG, EOG, EMG, ECG, etc.), and sleep staging is performed according to the R&K or AASM sleep staging criteria. At the same time, statistics are collected on arrhythmias, respiratory events, and awakening times, and sleep quality is assessed by analyzing the above multiple data.

[0003] Polysomnography obtains a rich variety of signals, but it requires various electrodes and numerous sensors to be attached to the patient, which puts a heavy physiological and psychological burden on the patient. In a sense, polysomnography monitoring itself interferes with sleep quality and affects the objectivity of the monitoring results. The contradiction between the high intrusion and high physiological load characteristics of polysomnography monitoring and the "people-oriented" no-load sleep monitoring needs is becoming increasingly prominent. The development of low physiological load or even no-load sleep monitoring technology has become an inevitable trend in the development of sleep medicine.

[0004] In addition to polysomnography, other sleep monitoring methods currently include polyencephalogram (EEG) monitoring, blood oxygen saturation monitoring, and body activity change recording. Polyencephalogram (EEG) equipment is expensive and complicated to operate, and requires a large number of electrodes to be attached to the subject's head, which seriously interferes with sleep. Blood oxygen saturation monitoring is generally used for sleep apnea monitoring and is of little value for sleep analysis of ordinary people. The inflatable micro-motion sensitive mattress used in the body activity change recording method is relatively large and not sensitive enough.

[0005] Therefore, it is necessary to provide a new method to solve the above technical problems. Summary of the invention

[0006] In order to achieve the above-mentioned purpose and other advantages of the present invention, the first purpose of the present invention is to provide a sleep monitoring device based on a piezoelectric sensor, including a main control circuit, a plurality of piezoelectric sensor arrays, a plurality of piezoelectric sensor interface circuits, a main control voltage stabilization circuit, and a sensor voltage stabilization circuit;

[0007] The main control circuit is electrically connected to the piezoelectric sensor array through the piezoelectric sensor interface circuit, the main control voltage stabilizing circuit is electrically connected to the main control circuit, and the sensor voltage stabilizing circuit is electrically connected to the piezoelectric sensor interface circuit;

[0008] The main control voltage stabilizing circuit is used to provide working power for the main control circuit;

[0009] The sensor voltage stabilizing circuit is used to supply power to the piezoelectric sensor array;

[0010] The piezoelectric sensor array is used to collect vital sign data of the user while sleeping;

[0011] The main control circuit is used to process the data collected by the piezoelectric sensor array to achieve sleep monitoring.

[0012] Furthermore, the main control circuit includes a main controller, a crystal oscillator circuit, and a reset circuit; the crystal oscillator circuit and the reset circuit are electrically connected to the main controller.

[0013] Furthermore, the crystal oscillator circuit includes a chip crystal oscillator, a first capacitor, and a second capacitor. Pin 1 of the chip crystal oscillator is grounded via the first capacitor, and pin 2 of the chip crystal oscillator is grounded via the second capacitor. Pin 1 and pin 2 of the chip crystal oscillator are electrically connected to the input pin and output pin of the low-speed external clock of the main controller, respectively.

[0014] Furthermore, the reset circuit includes a first resistor and a third capacitor, the first resistor is connected to the output end of the main control voltage stabilization circuit, the first resistor and the third capacitor are connected in series to ground, and the asynchronous reset pin of the main controller is connected between the first resistor and the third capacitor.

[0015] Further, the main control circuit also includes a storage circuit, which includes a Flash storage chip, a second resistor, a third resistor, a fourth capacitor, and a fifth capacitor. The chip selection pin of the Flash storage chip is connected to the output end of the main control voltage stabilization circuit via the second resistor, the holding pin via the third resistor, the write protection pin, and the power pin. The output end of the main control voltage stabilization circuit is grounded via the fourth capacitor, the ground pin of the Flash storage chip is grounded, the holding pin of the Flash storage chip is grounded via the fifth capacitor, and the data output pin, chip selection pin, serial clock pin, and data input pin of the Flash storage chip are connected to corresponding pins of the main controller.

[0016] Furthermore, the piezoelectric sensor array includes a plurality of piezoelectric ceramic sensors and a plurality of piezoelectric film sensors.

[0017] Furthermore, the piezoelectric sensor interface circuit includes a connector and multiple resistors. The piezoelectric ceramic sensor and the piezoelectric film sensor are respectively connected to the corresponding pins of the main controller via the pins on the connector and are grounded via resistors. The power pin of the connector is connected to the output end of the sensor voltage stabilization circuit, and the ground pin of the connector is grounded.

[0018] Furthermore, the main control voltage stabilization circuit adopts a low voltage drop three-terminal voltage regulator, and the sensor voltage stabilization circuit adopts a CMOS linear voltage regulator.

[0019] Furthermore, it also includes a capacitor filter circuit, which is formed by four capacitors connected in parallel and connected between the output terminal of the low voltage difference three-terminal regulator and the ground.

[0020] A second object of the present invention is to provide a sleep monitoring method, based on the above-mentioned sleep monitoring device, comprising the following steps:

[0021] Obtain vital signs data;

[0022] Calculating cardiac cycle intervals using the vital sign data;

[0023] Calculating the heart rate variability through the cardiac cycle intervals and making a heart rate scatter plot;

[0024] Obtaining health feedback information according to the heart rate variability;

[0025] Sinus rhythm, supraventricular and ventricular arrhythmias are determined based on the heart rate scattergram.

[0026] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0027] The present invention provides a sleep monitoring device based on a piezoelectric sensor and a sleep monitoring method thereof, which realizes mattress-type load-free sleep monitoring through a piezoelectric sensor array, and uses a non-contact method to measure the pressure changes caused by heart rhythm, breathing and body movement during sleep in a natural sleep state, without changing sleep habits and without any constraints. It is an ideal low-load sleep monitoring method with a more universal application scenario. This solution not only realizes the user's load-free, but also can extract data such as heart rate, breathing rate and body movement after digital signal processing, realizes the detection of parameters such as heart rate, breathing and body movement during load-free sleep, and performs sleep quality assessment. It can be used for sleep quality assessment of the general population, and can also be applied to other fields, such as sports heart rate monitoring, medical pulse monitoring, and sleep quality monitoring in daily training of astronauts.

[0028] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 Schematic diagram of a sleep monitoring device based on a piezoelectric sensor;

[0031] Figure 2 This is a schematic diagram of the main controller;

[0032] Figure 3 This is the crystal oscillator circuit diagram;

[0033] Figure 4 This is the reset circuit diagram;

[0034] Figure 5 For storing circuit diagrams;

[0035] Figure 6 This is the circuit diagram of the piezoelectric sensor interface;

[0036] Figure 7 This is the main control voltage stabilization circuit diagram;

[0037] Figure 8 This is the voltage stabilizing circuit diagram of the sensor;

[0038] Fig. 9 It is the circuit diagram of capacitor filter;

[0039] Fig.10 It is a schematic diagram of BCG;

[0040] Fig.11 This is a schematic diagram of the JJ interval of BCG;

[0041] Fig.12 is a scatter plot of heart rate;

[0042] Fig.13 This is a schematic diagram of the heart rate judgment result;

[0043] Fig.14 This is a typical BCG schematic diagram;

[0044] Fig.15 This is a schematic diagram of BCG in body motion;

[0045] Fig.16 This is a schematic diagram of mixed obstructive apnea;

[0046] Fig.17 The sleep monitoring method flow chart is shown in FIG.

[0047] Fig.18 It is a schematic diagram of computer equipment;

[0048] Fig.19A schematic diagram of a computer-readable storage medium. DETAILED DESCRIPTION

[0049] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. It should be noted that, under the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0050] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0051] The figure numbers in this application are only used to distinguish the various steps in the scheme, and are not used to limit the execution order of the various steps. The specific execution order is subject to the description in the specification.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0053] Example 1

[0054] A sleep monitoring device 100 based on a piezoelectric sensor, such as Figure 1 As shown, it includes a main control circuit 110, a plurality of piezoelectric sensor arrays 120, a plurality of piezoelectric sensor interface circuits 130, a main control voltage stabilizing circuit 140, and a sensor voltage stabilizing circuit 150;

[0055] The main control circuit is electrically connected to the piezoelectric sensor array through the piezoelectric sensor interface circuit, the main control voltage stabilizing circuit is electrically connected to the main control circuit, and the sensor voltage stabilizing circuit is electrically connected to the piezoelectric sensor interface circuit;

[0056] The main control voltage stabilizing circuit is used to provide working power for the main control circuit;

[0057] The sensor voltage stabilizing circuit is used to supply power to the piezoelectric sensor array;

[0058] The piezoelectric sensor array is used to collect vital sign data of the user while sleeping;

[0059] The main control circuit is used to process the data collected by the piezoelectric sensor array to achieve sleep monitoring.

[0060] When the heart beats and pumps blood into the large blood vessels, it causes slight body movements. This repetitive slight movement can be captured by a highly sensitive pressure sensor, which records the corresponding periodic movement in a graph called a ballistocardiogram (BCG). Figure 10-Figure 16 shown.

[0061] The above-mentioned sleep monitoring device 100 based on piezoelectric sensors is installed in a mattress. The weak body movement caused by the heartbeat is sensed by the high-sensitivity piezoelectric sensor array placed in the mattress, which triggers its piezoelectric effect and converts the vibration signal into a pseudo-voltage signal. The signal is digitized through the hardware system and transmitted to the host for subsequent signal processing, analysis and calculation, thereby obtaining a series of human heart function data indicators.

[0062] In some embodiments, the main control circuit includes a main controller, a crystal oscillator circuit, and a reset circuit; the crystal oscillator circuit and the reset circuit are electrically connected to the main controller. Figure 2 As shown, the main controller adopts STM32 microcontroller.

[0063] The crystal oscillator circuit is used to realize a stable oscillation circuit. Figure 3 As shown, the crystal oscillator circuit includes a chip crystal oscillator Y1, a first capacitor C11, and a second capacitor C12. Pin 1 of the chip crystal oscillator is grounded via the first capacitor, and pin 2 of the chip crystal oscillator is grounded via the second capacitor. Pin 1 and pin 2 of the chip crystal oscillator are electrically connected to the input pin OS32_I N and the output pin OS32_OUT of the low-speed external clock of the main controller, respectively.

[0064] The reset circuit is used to restore the circuit to the initial state. Figure 4 As shown, the reset circuit includes a first resistor R8 and a third capacitor C10, the first resistor is connected to the output end of the main control voltage stabilization circuit, that is, connected to a 3V3 power supply, the first resistor and the third capacitor are connected in series to ground, and the asynchronous reset pin NRST of the main controller is connected between the first resistor and the third capacitor.

[0065] In some embodiments, the main control circuit further includes a storage circuit, which is used to store data of the main controller, including but not limited to data transmitted back to the main controller by the piezoelectric sensor array. Figure 5As shown, the storage circuit includes a Flash storage chip U1, a second resistor R28, a third resistor R29, a fourth capacitor C18, and a fifth capacitor C2. The chip selection pin CS of the Flash storage chip is connected to the output end of the main control voltage stabilization circuit via the second resistor, the holding pin HOLD via the third resistor, the write protection pin WP, and the power pin VCC, that is, connected to the 3V3 power supply. The output end of the main control voltage stabilization circuit (that is, the 3V3 power supply) is grounded via the fourth capacitor, the ground pin GND of the Flash storage chip is grounded, the holding pin of the Flash storage chip is grounded via the fifth capacitor, and the data output pin SO, chip selection pin CS, serial clock pin CLK, and data input pin SI of the Flash storage chip are connected to corresponding pins of the main controller.

[0066] The piezoelectric sensor array includes a plurality of piezoelectric ceramic sensors and a plurality of piezoelectric film sensors. Preferably, the piezoelectric sensor array includes two piezoelectric ceramic sensors and one piezoelectric film sensor. That is, each piezoelectric sensor interface circuit is electrically connected to two piezoelectric ceramic sensors and one piezoelectric film sensor to collect vital sign data of the user while sleeping.

[0067] This embodiment takes five piezoelectric sensor interface circuits as an example. Each piezoelectric sensor interface circuit is as follows. Figure 6 As shown. Further, the piezoelectric sensor interface circuit includes a connector X1, a plurality of resistors, preferably X1 is a 6P pitch 1.25 horizontal pin connector, the piezoelectric ceramic sensor and the piezoelectric film sensor are each connected to the corresponding pin of the main controller via the pin on the connector, and are grounded via the resistor, for example, one of the piezoelectric ceramic sensors in a piezoelectric sensor array is electrically connected to pin 5 of X1 and X_OUT1 of the main controller, another piezoelectric ceramic sensor is electrically connected to pin 1 of X1 and Y_OUT1 of the main controller, the piezoelectric film sensor is electrically connected to pin 2 of X1 and YL1 of the main controller, the power pin of the connector (pin 3 of X1) is connected to the output end of the sensor voltage stabilization circuit, that is, connected to a 3V power supply, and the ground pin of the connector (pin 4 of X1) is grounded.

[0068] like Figure 7 As shown, the main control voltage stabilization circuit adopts a low voltage difference three-terminal voltage regulator U4, the IN pin of U4 is connected to a 5V power supply and grounded through C16 and C15 in parallel, the ADI pin is grounded, and the two OUT pins are grounded through C14 and C17 in parallel. The OUT pin of U4 outputs a voltage of 3.3V to provide working power for the main control circuit.

[0069] like Figure 8As shown, the sensor voltage stabilization circuit adopts a CMOS linear regulator U3, the IN pin of U3 is connected to a 5V power supply and grounded via C9, the GND pin is grounded, the EN pin is grounded via a resistor R4, the OUT pin is grounded via C18, the OUT pin of U3 outputs a voltage of 3 to power the piezoelectric sensor array, and the BP pin is grounded via C7.

[0070] In some embodiments, Fig. 9 As shown, it also includes a capacitor filter circuit, which is formed by four capacitors C5, C4, C3, and C6 connected in parallel. The capacitor filter circuit is connected between the output end of the low voltage difference three-terminal regulator and the ground.

[0071] The sleep monitoring method of the sleep monitoring device based on the piezoelectric sensor is as follows: Fig.17 As shown, the method comprises the following steps:

[0072] S1, obtaining vital sign data; that is, the vital sign data collected by the plurality of piezoelectric sensor arrays 120, generating a ballistocardiogram (BCG), a typical ballistocardiogram is as follows Fig.14 As shown, the heart beat diagram with body movement is as follows Fig.15 Mixed obstructive apnea is shown in Fig.16 shown.

[0073] S2, calculating the cardiac cycle interval using the vital sign data; Fig.11 As shown, for BCG, the JJ interval is calculated.

[0074] S3, calculating the heart rate variability through the cardiac cycle interval, and making a heart rate scatter plot;

[0075] Heart rate variability is calculated by recording the JJ interval series to obtain HRV.

[0076] like Fig.12 As shown, by collecting the JJ interval data in the BCG and drawing a graph, a heart rate scatter plot is obtained, which can be used to macroscopically judge the sinus rate, supraventricular and ventricular arrhythmias.

[0077] S4, obtaining health feedback information according to the heart rate variability;

[0078] HRV can be used for stress recovery. By analyzing the difference between each heartbeat, timely health feedback information can be obtained. The larger the HRV value, the better the recovery and rest, and the healthier.

[0079] S5. Determine the sinus rate, supraventricular and ventricular arrhythmias according to the heart rate scatter plot.

[0080] like Fig.13As shown, the heart rate scatter plot can be used to determine normal sinus rate, sinus rhythm combined with supraventricular premature beats, and persistent atrial fibrillation.

[0081] This embodiment provides a sleep monitoring device based on a piezoelectric sensor, which realizes mattress-type load-free sleep monitoring through a piezoelectric sensor array. It uses a non-contact method to measure the pressure changes caused by heart rhythm, breathing and body movement during sleep in a natural sleep state, without changing sleep habits and without any constraints. It is an ideal low-load sleep monitoring method with a more universal application scenario. This solution not only realizes the user's load-free, but also can extract heart rate, breathing rate and body movement data after digital signal processing, realizes the detection of parameters such as heart rate, breathing and body movement during load-free sleep, and performs sleep quality assessment. It can be used for sleep quality assessment of the general population, and can also be applied to other fields, such as sports heart rate monitoring, medical pulse monitoring, and sleep quality monitoring in astronauts' daily training.

[0082] Example 2

[0083] A sleep monitoring method is provided, based on the above-mentioned sleep monitoring device. For a detailed description of the sleep monitoring device, reference may be made to the corresponding description in the above-mentioned sleep monitoring device embodiment, which will not be repeated here.

[0084] like Fig.17 As shown, the method comprises the following steps:

[0085] S1, obtaining vital sign data; that is, the vital sign data collected by the plurality of piezoelectric sensor arrays 120, generating a ballistocardiogram (BCG), a typical ballistocardiogram such as Fig.14 As shown, the heart beat diagram with body movement is as follows Fig.15 Mixed obstructive apnea is shown in Fig.16 shown.

[0086] S2, calculating the cardiac cycle interval using the vital sign data; Fig.11 As shown, for BCG, the JJ interval is calculated.

[0087] S3, calculating the heart rate variability through the cardiac cycle interval, and making a heart rate scatter plot;

[0088] Heart rate variability is calculated by recording the JJ interval series to obtain HRV.

[0089] like Fig.12 As shown, by collecting the JJ interval data in the BCG and drawing a graph, a heart rate scatter plot is obtained, which can be used to macroscopically judge the sinus rate, supraventricular and ventricular arrhythmias.

[0090] S4, obtaining health feedback information according to the heart rate variability;

[0091] HRV can be used for stress recovery. By analyzing the difference between each heartbeat, timely health feedback information can be obtained. The larger the HRV value, the better the recovery and rest, and the healthier.

[0092] S5. Determine the sinus rate, supraventricular and ventricular arrhythmias according to the heart rate scatter plot.

[0093] like Fig.13 As shown, the heart rate scatter plot can be used to determine normal sinus rate, sinus rhythm combined with supraventricular premature beats, and persistent atrial fibrillation.

[0094] This embodiment provides a sleep monitoring method. Based on the sleep monitoring device provided in Example 1, a mattress-type load-free sleep monitoring is realized through a piezoelectric sensor array. The pressure changes caused by heart rhythm, breathing and body movement during sleep are measured in a non-contact manner in a natural sleep state. Sleep habits are not changed and there are no constraints. It is an ideal low-load sleep monitoring method with a more universal application scenario. This solution not only realizes the user's load-free, but also can extract heart rate, breathing rate and body movement data after digital signal processing, realizes the detection of parameters such as heart rate, breathing and body movement during load-free sleep, and performs sleep quality assessment. It can be used for sleep quality assessment of the general population, and can also be applied to other fields, such as sports heart rate monitoring, medical pulse monitoring, and sleep quality monitoring in astronauts' daily training.

[0095] Example 3

[0096] A computer device 200, such as Fig.18 As shown, it includes a memory 210, a processor 220, and a computer program 230 stored in the memory and executable on the processor. When the processor executes the computer program, the steps of a sleep monitoring method are implemented. For a detailed description of the method, reference can be made to the corresponding description in the above method embodiment, which will not be repeated here.

[0097] Example 4

[0098] A computer readable storage medium such as Fig.19 As shown, a computer program is stored thereon, and when the computer program is executed by the processor, the steps of a sleep monitoring method are implemented. For a detailed description of the method, reference may be made to the corresponding description in the above method embodiment, and no further description is given here.

[0099] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0100] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

[0101] The apparatus, computer device, non-volatile computer storage medium and method provided in the embodiments of this specification correspond to each other, and therefore, the apparatus, computer device and non-volatile computer storage medium also have similar beneficial technical effects as the corresponding method. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the corresponding apparatus, computer device and non-volatile computer storage medium will not be repeated here.

[0102] Those skilled in the art also know that, in addition to implementing the controller in a purely computer-readable program code, the controller can be made to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software units for implementing the method and structures within the hardware component.

[0103] The systems, devices or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. For the convenience of description, the above devices are described separately by functions in various units. Of course, when implementing one or more embodiments of this specification, the functions of each unit can be implemented in the same or more software and / or hardware.

[0104] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems, or computer program products. Therefore, the embodiments of this specification may be in the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the embodiments of this specification may be in the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0105] This specification is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of this specification. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0106] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0107] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0108] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0109] The specification may be described in the general context of computer-executable instructions executed by a computer, such as program units. Generally, program units include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communications network. In a distributed computing environment, program units may be located in local and remote computer storage media, including storage devices.

[0110] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0111] The above description is only an embodiment of this specification and is not intended to limit one or more embodiments of this specification. For those skilled in the art, one or more embodiments of this specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of this specification shall be included in the scope of the claims of one or more embodiments of this specification.

Claims

1. A sleep monitoring device based on a piezoelectric sensor, characterized in that: It includes a main control circuit, multiple piezoelectric sensor arrays, multiple piezoelectric sensor interface circuits, a main control voltage stabilization circuit, and a sensor voltage stabilization circuit; The main control circuit is electrically connected to the piezoelectric sensor array through the piezoelectric sensor interface circuit, the main control voltage stabilizing circuit is electrically connected to the main control circuit, and the sensor voltage stabilizing circuit is electrically connected to the piezoelectric sensor interface circuit; The main control voltage stabilizing circuit is used to provide working power for the main control circuit; The sensor voltage stabilizing circuit is used to supply power to the piezoelectric sensor array; The piezoelectric sensor array is used to collect vital sign data of the user while sleeping; The main control circuit is used to process the data collected by the piezoelectric sensor array to achieve sleep monitoring.

2. A sleep monitoring device based on a piezoelectric sensor as claimed in claim 1, characterized in that: The main control circuit includes a main controller, a crystal oscillator circuit, and a reset circuit; the crystal oscillator circuit and the reset circuit are electrically connected to the main controller.

3. A sleep monitoring device based on a piezoelectric sensor as claimed in claim 2, characterized in that: The crystal oscillator circuit includes a chip crystal oscillator, a first capacitor, and a second capacitor. Pin 1 of the chip crystal oscillator is grounded via the first capacitor, and pin 2 of the chip crystal oscillator is grounded via the second capacitor. Pin 1 and pin 2 of the chip crystal oscillator are electrically connected to the input pin and output pin of the low-speed external clock of the main controller, respectively.

4. A sleep monitoring device based on a piezoelectric sensor as claimed in claim 3, characterized in that: The reset circuit includes a first resistor and a third capacitor. The first resistor is connected to the output end of the main control voltage stabilization circuit. The first resistor and the third capacitor are connected in series to ground. The asynchronous reset pin of the main controller is connected between the first resistor and the third capacitor.

5. A sleep monitoring device based on a piezoelectric sensor as claimed in claim 4, characterized in that: The main control circuit also includes a storage circuit, which includes a Flash storage chip, a second resistor, a third resistor, a fourth capacitor, and a fifth capacitor. The chip selection pin of the Flash storage chip is connected to the output end of the main control voltage stabilization circuit via the second resistor, the holding pin via the third resistor, the write protection pin, and the power pin. The output end of the main control voltage stabilization circuit is grounded via the fourth capacitor, the ground pin of the Flash storage chip is grounded, the holding pin of the Flash storage chip is grounded via the fifth capacitor, and the data output pin, chip selection pin, serial clock pin, and data input pin of the Flash storage chip are connected to corresponding pins of the main controller.

6. A sleep monitoring device based on a piezoelectric sensor as claimed in claim 2, characterized in that: The piezoelectric sensor array includes a plurality of piezoelectric ceramic sensors and a plurality of piezoelectric film sensors.

7. A sleep monitoring device based on a piezoelectric sensor as claimed in claim 6, characterized in that: The piezoelectric sensor interface circuit includes a connector and multiple resistors. The piezoelectric ceramic sensor and the piezoelectric film sensor are respectively connected to the corresponding pins of the main controller via the pins on the connector and are grounded via resistors. The power pin of the connector is connected to the output end of the sensor voltage stabilization circuit, and the ground pin of the connector is grounded.

8. A sleep monitoring device based on a piezoelectric sensor as claimed in claim 1, characterized in that: The main control voltage stabilization circuit adopts a low voltage difference three-terminal voltage stabilizer, and the sensor voltage stabilization circuit adopts a CMOS linear voltage stabilizer.

9. A sleep monitoring device based on a piezoelectric sensor as claimed in claim 8, characterized in that: It also includes a capacitor filter circuit, which is formed by connecting four capacitors in parallel. The capacitor filter circuit is connected between the output end of the low voltage difference three-terminal regulator and the ground.

10. A sleep monitoring method, based on the sleep monitoring device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Obtain vital signs data; Calculating cardiac cycle intervals using the vital sign data; Calculating the heart rate variability through the cardiac cycle intervals and making a heart rate scatter plot; Obtaining health feedback information according to the heart rate variability; Sinus rhythm, supraventricular and ventricular arrhythmias are determined based on the heart rate scattergram.

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