CN112741594A

CN112741594A - Sleep monitoring device and method

Info

Publication number: CN112741594A
Application number: CN201911038993.0A
Authority: CN
Inventors: 刘众; 王新安; 孙成俊; 何春舅
Original assignee: Peking University Shenzhen Graduate School
Current assignee: Peking University Shenzhen Graduate School
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2021-05-04

Abstract

The invention provides a sleep monitoring device, comprising: a gyroscope for detecting a vibration state of the apparatus and outputting motion information; the preprocessing unit is connected with the gyroscope, receives the angle information, preprocesses the angle information and converts the angle information into a digital signal; and the processing unit is connected with the preprocessing unit, receives and carries out FFT (fast Fourier transform) on the digital signal, carries out feature extraction on a transform result to obtain the heart rate and the respiratory rate reflecting the sleep state of the user, and records and analyzes the heart rate and the respiratory rate. The invention also relates to a sleep monitoring method. The monitoring device provided by the invention can be used for detecting whether a user to be monitored exists or not by utilizing the gyroscope in a human body isolation mode, detecting the vibration of the device caused by breathing and heartbeat when the user sleeps, and obtaining the sleep state of the user according to the vibration information to help the user to better know the sleep state of the user.

Description

Sleep monitoring device and method

Technical Field

The invention relates to the field of sleep monitoring, in particular to a sleep monitoring device and method.

Background

With the development of society, the role of sleep on human health is increasing day by day. The poor sleep usually influences the normal work and life of people, especially for some office workers who are in high-strength load, the sleep problem of different degrees appears because of pressure fatigue, and then weakens the function of immune system and endocrine system, simultaneously, still can influence people's thinking and judgment, leads to vicious circle. Therefore, monitoring and evaluation of sleep quality is of paramount importance.

At present, the existing sleep monitoring device mainly has a monitoring device which judges the sleep quality of a monitored person by monitoring the heart rate of the monitored person. The heart rate refers to the frequency of human heart beats, and heart rate data is obtained by detecting electrical signals generated by human heart cells. The existing method needs to stick an electrode plate on the body of a monitored person, the signal acquisition effect is very poor for people with dry skin, particularly, conductive paste needs to be smeared on the contact part of the electrode plate and the human body for multiple times in winter, the conductive paste can stimulate the skin of the human body, and the sleep quality of the monitored person can be influenced to a certain extent.

Disclosure of Invention

The invention aims to provide a sleep monitoring device and a sleep monitoring method, and aims to solve the problem that the sleep quality of a user is influenced by the current sleep detection mode.

The invention provides a sleep monitoring device, comprising:

a gyroscope for detecting a vibration state of the apparatus and outputting motion information;

the preprocessing unit is connected with the gyroscope, receives the angle information, preprocesses the angle information and converts the angle information into a digital signal;

the processing unit is connected with the preprocessing unit, receives and carries out FFT (fast Fourier transform) on the digital signal, and carries out feature extraction on a transform result to obtain a heart rate and a respiratory rate reflecting the sleep state of the user;

and the recording and analyzing unit is used for recording and analyzing the monitored data.

The invention also provides a sleep monitoring method, which is applied to sleep articles and is implemented by using the sleep monitoring device, and the method comprises the following steps:

detecting the vibration state of the sleep article through a gyroscope and outputting motion information;

preprocessing the angle information and converting the angle information into a digital signal;

and carrying out FFT conversion on the digital signal and carrying out feature extraction on a conversion result to obtain the heart rate and the respiratory rate reflecting the sleep state of the user.

According to the sleep monitoring device and the sleep monitoring method, whether the user to be monitored exists or not is detected in a human body isolation mode through the gyroscope in an induction mode, the vibration of the device caused by breathing and heartbeat of the user during sleep is detected, and the sleep state of the user is obtained according to the information of the vibration.

Drawings

FIG. 1 is a schematic cross-sectional view of a sleep monitor and improvement device according to a first embodiment of the present invention;

FIG. 2 is a block diagram of a sleep monitor and improvement apparatus according to another embodiment of the present invention;

FIG. 3 is a flowchart of a sleep monitoring method according to a preferred embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 2, the sleep monitor device 1 of the present invention can be embedded in or placed under a pillow, a mattress, a cushion, an eyeshade, an earphone, etc., or under a pillow, a mattress, and a cushion. The sleep monitoring and improving device 1 comprises a shell 2 and a PCB 3, wherein a supporting part 4 is arranged in the shell 2, and the supporting part 4 can be an elastic cantilever beam structure or an arch structure. In this embodiment, a supporting column 100 is disposed between the casing 2 and the supporting member 4, and when the casing 2 is subjected to external pressure, the supporting column 100 can press the supporting member 4.

The sleep monitor device 1 in the preferred embodiment of the present invention includes a gyroscope 5, a preprocessing unit 6, a processing unit 7, and an alpha wave emitting unit 8. Preferably, the monitoring device 1 further comprises a recording and analyzing unit.

The gyroscope 5 is a high-sensitivity gyroscope for detecting the vibration state of the apparatus 1 and outputting motion information. The gyroscope 5 is arranged on the support member 4 and is capable of vibrating following the vibrations of the device 1 caused by the user's breathing and heartbeat. Specifically, a person lies on the mattress and sleeps on the pillow for a normal sleep, and after a stable sleep, vibrations caused by breathing and heartbeat can be transmitted to the support member 4, causing a change in the angle of the support member 4, which is detected by the highly sensitive gyroscope 5. In addition, the gyroscope 5 may also detect whether the apparatus 1 needs to enter a monitoring state. The condition for entering the monitoring state is whether the device 1 or the product containing the device 1 is subjected to movements or vibrations.

And the preprocessing unit 6 is connected with the gyroscope 5, receives the angle information, preprocesses the angle information and converts the angle information into a digital signal. The preprocessing unit 6 includes a filter amplifying circuit and an a/D conversion circuit.

The processing unit 7 is a main control chip, the processing unit 7 is connected with the preprocessing unit 6, receives and performs Fast Fourier Transform (FFT) on the digital signal, and performs feature extraction on a transform result to obtain a heart rate and a respiratory rate reflecting a sleep state of a user. Further, a low power consumption algorithm is adopted, that is, the processing unit 7 is further configured to receive the motion information, and determine whether a user needs to be monitored according to the motion information. When no person is detected, only part of the circuit is kept to operate, other parts of the circuit are closed, and the whole circuit is opened after the person is detected.

Specifically, the main control chip performs FFT on the digital signal, converts the time domain signal f (t) into the frequency domain signal f (w), and then performs filtering and feature extraction in the frequency domain. Extracting the characteristic frequency f1 of the respiration, wherein 1/f1 is the respiration rate which is the corresponding respiration frequency of one minute at the time; extracting the characteristic frequency f2 corresponding to the heartbeat, wherein the 1/f2 is the corresponding heartbeat frequency of one minute at the moment, namely the heart rate. The sleep state at that time can then be reflected by the change in the heart rate and breathing rate during sleep. And then the obtained sleep information such as the heart rate, the breathing rate and the like is transmitted to an intelligent terminal 10 such as a mobile phone and the like through a wireless transmission module 9 such as a low-power Bluetooth and the like.

And the record analysis unit records and stores the detected data and analyzes the data in real time. The record analysis unit is used for analyzing the sleep information of the user to obtain a sleep quality report. The sleep monitoring device 1 is further provided with a USB interface or a microUSB interface, which facilitates outputting a sleep quality report.

In addition, referring to fig. 1 and fig. 3, the present invention further provides a sleep monitoring method, which is applied to a sleep product and is completed by using the above-mentioned apparatus, the method includes the following steps:

step S110, detecting the vibration state of the sleep article through a gyroscope 5 and outputting motion information; the gyroscope 5 is provided on the support member 4, and is capable of vibrating following the vibration of the apparatus 1 caused by the breathing and heartbeat of the user, thereby outputting vibration data.

And step S120, preprocessing the angle information and converting the angle information into a digital signal. And processing the motion information by using a filtering amplification circuit and an A/D conversion circuit.

Step S130, FFT conversion is carried out on the digital signals, and feature extraction is carried out on conversion results, so that heart rate and respiration rate reflecting the sleep state of the user are obtained. Specifically, the digital signal is subjected to FFT, the time domain signal f (t) is converted into a frequency domain signal f (w), and then filtering and feature extraction are performed in the frequency domain. Extracting the characteristic frequency f1 of the respiration, wherein 1/f1 is the respiration rate which is the corresponding respiration frequency of one minute at the time; extracting the characteristic frequency f2 corresponding to the heartbeat, wherein the 1/f2 is the corresponding heartbeat frequency of one minute at the moment, namely the heart rate. The sleep state at that time can then be reflected by the change in the heart rate and breathing rate during sleep. And then the obtained sleep information such as the heart rate, the breathing rate and the like is transmitted to an intelligent terminal 10 such as a mobile phone and the like through a wireless transmission module 9 such as Bluetooth and the like.

In a further embodiment, the method further includes receiving the motion information, and determining whether a user is to be monitored according to the motion information. When no user to be monitored is detected, only part of the circuit is kept to operate, other parts of the circuit are closed, and the whole circuit is opened after a person is detected.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of each functional unit is illustrated, and in practical applications, the above-mentioned functional allocation may be performed by different functional units according to requirements, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit in the embodiments may be integrated in one processing unit 7, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the application. For the specific working process of the units in the above-mentioned apparatus, reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.

In summary, the embodiment of the present invention detects whether a user to be monitored is detected by using the gyroscope 5 in a manner of isolating a human body, detects the vibration of the apparatus caused by breathing and heartbeat when the user is sleeping, and obtains the sleeping state of the user according to the information of the vibration.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated into one processing unit 7, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present invention may be implemented in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sleep monitoring device, comprising:

a recording and analyzing unit.

2. The sleep monitoring device as in claim 1, wherein the processing unit is further configured to record and analyze the heart rate and respiration rate of the user for sleep state data.

3. The sleep monitoring device as claimed in claim 1, further comprising a wireless transmission module for transmitting a heart rate and a breathing rate reflecting a sleep state of a user to a smart terminal to record and present the sleep state of the user.

4. The sleep monitoring device as claimed in claim 1, wherein the processing unit is further configured to receive motion information, and determine whether a user is to be monitored according to the motion information.

5. The sleep monitoring device as in claim 1, further comprising a resilient support member, the piezoelectric film and the gyroscope being disposed on the support member.

6. A sleep monitoring method, characterized in that the method is performed with a sleep monitoring device according to any of claims 1-5, the method comprising the steps of: