CN115381247A

CN115381247A - Sleep monitoring mattress and sleep monitoring equipment

Info

Publication number: CN115381247A
Application number: CN202210912005.6A
Authority: CN
Inventors: 闵锐; 李小俚; 李林青; 王茁; 何润杰
Original assignee: Zhuhai Campus Of Beijing Normal University
Current assignee: Zhuhai Campus Of Beijing Normal University
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-25
Anticipated expiration: 2042-07-29
Also published as: CN115381247B

Abstract

The application discloses sleep monitor mattress and sleep monitor equipment. The sleep monitoring mattress comprises in sequence: the optical fiber sensor is clamped between the elastic supporting layer and the mounting layer, and the optical fiber sensor is fixed on the mounting layer; the optical fiber sensor comprises a plurality of sections of optical fiber sensing units, wherein each section of optical fiber sensing unit comprises two sections of optical fiber main bodies and a light loss part connected between the two sections of optical fiber main bodies; the pressure application layer is capable of acting on the optical loss section under the action of external pressure, and optical loss corresponding to the external pressure is generated in the optical loss section. The application provides an optical fiber sensor security that sleep monitoring mattress adopted is higher, and the working range is big, and has anti-electromagnetic interference ability for the monitoring result is more accurate.

Description

Sleep monitoring mattress and sleep monitoring equipment

Technical Field

The application relates to the technical field of sleep monitoring, and more particularly relates to a sleep monitoring mattress and a sleep monitoring device.

Background

The sleep is one of indispensable activities in the life activities of individuals, can relieve and eliminate fatigue, is a key link for repairing and restoring the organism, and plays an important role in the continuation of the life of the individuals. The good sleep quality can enhance the immunity of the organism and improve the regulation capability of the nervous system, and a large number of patients suffering from diseases related to sleep disorder, such as chronic non-infectious diseases of diabetes, depression, cardiovascular diseases and the like, exist in China at present.

In order to detect and monitor these potential chronic non-infectious disease patients early and improve their sleep quality and thus their physical health, various sleep monitoring tools have been produced in the market to assist sleep quality assessment. In the prior art, the respiration and heart rate of a user are measured by monitoring an electrocardiogram or a photoflux pulse wave, but the methods need to connect wires to the human body, so the methods are not suitable for long-term use. In addition, although respiration and heart rate measurements are performed using pressure films, electromagnetic wave reflection, acoustic sensors, and other electrical sensors, these measurement methods are susceptible to electromagnetic interference and have problems with electrical safety.

Disclosure of Invention

It is an object of the present application to provide a new technical solution for a sleep monitoring mattress.

According to a first aspect of the application, there is provided a sleep monitoring mattress comprising in order:

the optical fiber sensor is clamped between the elastic supporting layer and the mounting layer, and the optical fiber sensor is fixed on the mounting layer;

the optical fiber sensor comprises a plurality of sections of optical fiber sensing units, wherein each section of optical fiber sensing unit comprises two sections of optical fiber main bodies and an optical loss part connected between the two sections of optical fiber main bodies;

the pressure application layer is capable of acting on the optical loss section under the action of external pressure, and optical loss corresponding to the external pressure is generated in the optical loss section.

Optionally, a protrusion is disposed on the pressure applying layer at a position corresponding to each light loss portion, a first hollow area is disposed on the elastic support layer at a position corresponding to each protrusion, a second hollow area is disposed on the mounting layer at a position corresponding to each light loss portion, and the protrusion is disposed opposite to the light loss portion through the first hollow area;

the pressing layer can be pressed against the light loss part through the protruding part under the action of external pressure, so that the light loss part is deformed in the second hollow-out area and generates light loss.

Optionally, a ratio of a dimension of the protrusion in a thickness direction of the elastic support layer to a thickness of the elastic support layer is < 1.

Optionally, the shape of the protrusion is a cylinder, a hemisphere, a cuboid, or a cone.

Optionally, the shape, material and thickness of the pressure layer and the mounting layer are the same, and the ratio of the thickness of the elastic support layer to the thickness of the pressure layer or the mounting layer is 3/50.

Optionally, the pressing layer and the mounting layer are made of a PVC material, a PC material or a PP material, and the elastic supporting layer is made of an EPE material, latex or memory sponge.

Optionally, the optical loss part includes a hose and a precursor filled in the hose, two segments of the optical fiber body are respectively connected to the precursor through two ends of the hose, and the precursor is polydimethylsiloxane or TPU.

Optionally, the preparation method of the optical fiber sensing unit comprises:

taking two sections of the optical fiber main bodies, and respectively stripping off the cladding at one end of each optical fiber main body;

taking a section of the hose, injecting the precursor into the hose, and respectively inserting one end of each of the two sections of the optical fiber main bodies, which is stripped of the cladding, into the precursor from two ends of the hose;

and heating and curing the two ends of the hose to obtain the optical fiber sensing unit.

Optionally, one side of the pressure layer and one side of the mounting layer, which are far away from the elastic support layer, are both provided with a protective layer, and the protective layers are made of a silica gel material.

According to a second aspect of the present application, there is provided a sleep monitoring device comprising: a monitoring circuit and the sleep monitoring mattress of the first aspect;

the monitoring circuit is connected with the optical fiber sensor, and the monitoring circuit can convert the optical loss generated by the optical loss part into an electric signal.

Optionally, the monitoring circuit comprises a light source, a driving circuit and a receiver;

the light source is coupled to the first end of the optical fiber sensor, and the driving circuit is connected with the light source and can drive the light source to emit light rays with fixed light intensity;

the receiver is coupled to the second end of the optical fiber sensor and used for receiving the light and converting the light intensity of the received light into the electric signal.

Optionally, the receiver converting the received light intensity of the light into an electrical signal includes:

amplifying the received light intensity and converting the change in light intensity into a change in current and converting the change in current into a change in voltage to form the electrical signal.

Optionally, the monitoring circuit further includes a bluetooth module, and the bluetooth module is connected to the receiver and is capable of transmitting the electrical signal to an external data processing module.

According to one embodiment of the application, the application provides a sleep monitoring mattress sequentially comprises a pressure application layer, an elastic supporting layer and a mounting layer. Wherein, set up optical fiber sensor on the surface mounting layer for under the effect that the layer of exerting pressure receives external pressure, can act on optical fiber sensor's light loss portion, and produce the light loss. In practical applications, when the monitored subject lies on the sleep monitoring mattress, the breathing, heart rate or body movement of the monitored subject may cause the pressure applying layer to act on the light loss portion and generate different light loss values, and the sleep quality of the monitored subject may be evaluated by analyzing the light loss values, thereby achieving the purpose of monitoring the health status.

Different from the traditional measuring method, the sleep monitoring mattress adopted by the application is not required to be connected to a human body and is suitable for long-term use, the adopted optical fiber sensor has the electromagnetic interference resistance, and the biocompatibility and the chemical stability are better, so that the monitoring process is safer, and the monitoring result is more accurate.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a sleep monitoring mattress provided by the present application.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic diagram of the practical application of fig. 2.

Fig. 4 is a schematic view of a mount layer to which an optical fiber sensor is fixed.

Fig. 5 is a schematic diagram illustrating a structural change of the optical fiber sensing unit when external pressure is applied to the optical loss section.

Fig. 6 is a process diagram of a method of manufacturing an optical fiber sensing unit.

Fig. 7 is a schematic structural diagram of a sleep monitoring device provided in the present application.

Fig. 8 is a schematic circuit connection diagram of a sleep monitoring device provided in the present application.

Fig. 9 is a schematic diagram of changes of measured light intensity with time when a human body sleeps by using the sleep monitoring device provided by the application.

Fig. 10 is a power spectrum corresponding to the variation of light intensity over time in fig. 9.

Fig. 11 is an isolated respiration waveform corresponding to fig. 10.

Fig. 12 is a waveform of the heartbeat separated corresponding to fig. 10.

Description of the reference numerals:

100. a sleep monitoring mattress; 1. a protective layer; 2. applying a pressure layer; 21. a boss portion; 3. an elastic support layer; 31. a first hollowed-out area; 4. an optical fiber sensor; 41. a fiber body; 42. a light loss section; 5. a mounting layer; 51. a second hollowed-out area; 200. a human body; 300. a monitoring circuit.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1-6, the present application provides a sleep monitoring mattress 100, comprising, from top to bottom: the optical fiber sensor comprises a pressure application layer 2, an elastic supporting layer 3 and a mounting layer 5, wherein an optical fiber sensor 4 is clamped between the elastic supporting layer 3 and the mounting layer 5, and the optical fiber sensor 4 is fixed on the mounting layer 5; the optical fiber sensor 4 comprises a plurality of sections of optical fiber sensing units, wherein each section of optical fiber sensing unit comprises two sections of optical fiber main bodies 41 and an optical loss part 42 connected between the two sections of optical fiber main bodies 41; the pressure application layer 2 is capable of acting on the optical loss section 42 when receiving an external pressure, and an optical loss corresponding to the external pressure is generated in the optical loss section 42.

Specifically, in actual use, a monitored object (hereinafter, referred to as a user) may lie on the sleep monitoring mattress 100, that is, on the pressure applying layer 2, during sleep, the user may change the pressure applied on the pressure applying layer 2 by the user along with the pulsation of the breathing frequency or the heart rate, and the pressure applying layer 2 may act on the optical loss portion 42 to generate optical loss, so that the change of the pressure on the pressure applying layer 2 is finally reflected as a change of the optical loss value, and according to the change of the optical loss value, the heart rate, the breathing rate and the body movement information of the user can be analyzed, thereby achieving the purpose of evaluating the sleep quality of the user.

In the monitoring process, a user does not need to connect various electric wires and other equipment, and a monitoring result is not influenced by electromagnetic interference, so that finally obtained information is more accurate. In addition, the resilient support layer 3 disposed between the pressure application layer 2 and the attachment layer 5 enables greater comfort and safety of the entire sleep monitoring mattress 100. Wherein, the quantity of optic fibre sensing unit can design according to the demand, and the figure is more, distribute more on surface mounting layer 5, and the area of the user's that corresponds the mattress measurable rhythm of the heart and respiratory rate is bigger, and the body motion scope of record is bigger, can be applicable to the crowd that sleep posture and position are unfixed.

In the present embodiment, the materials of the pressing layer 2, the elastic support layer 3, and the mounting layer 5 may be selected according to actual conditions. The pressure applying layer 2 and the mounting layer 5 can be made of PVC (polyvinyl chloride) material with the thickness smaller than 5mm, PC (polycarbonate) material or PP (polypropylene) and the like, and have good rebound resilience and flexibility, smooth surface, stable mechanical property and low tension permanent deformation, so that the comfort and the service life of the sleep monitoring mattress 100 are improved. In addition, the elastic supporting layer 3 can be made of a flexible material with good elasticity and resilience, such as latex, EPE (pearl wool) or memory sponge, and the comfort of the sleep monitoring mattress 100 is further improved. The optical fiber sensor 4 may be adhered to the mounting layer 5 by glue or the like, or may be fixed by a binding tape or other fixing members, which is not limited in this application.

Alternatively, as shown in fig. 1 and fig. 3, a protruding portion 21 is disposed on the pressure applying layer 2 at a position corresponding to each light loss portion 42, a first hollow area 31 is disposed on the elastic support layer 3 at a position corresponding to each protruding portion 21, a second hollow area 51 is disposed on the mounting layer 5 at a position corresponding to each light loss portion 42, and the protruding portion 21 is disposed opposite to the light loss portion 42 through the first hollow area 31; under the action of external pressure, the pressure application layer 2 can press the light loss part 42 through the protruding part 21, so that the light loss part 42 is deformed in the second hollow-out area 51, and the light loss is generated.

Specifically, in the present embodiment, the pressing layer 2 is provided with a protruding portion 21 facing the mounting layer 5, and the first hollow-out area 31 provided on the elastic support layer 3 can be free from the protruding portion 21, so that the protruding portion 21 can be located in the first hollow-out area 31 when not under a force and close to the light loss portion 42 of the optical fiber sensing unit. When a user lies on the pressure applying layer 2, referring to fig. 3 to 5, the convex portion 21 is pressed against the mounting layer 5, and presses the loss optical portion 42 to cause a change in optical loss. The mounting layer 5 is provided with the second hollow-out area 51 at the position of the light loss portion 42, so that when the light loss portion 42 deforms downward, that is, when the light loss portion 42 bends and deforms downward under the abutting action of the protruding portion 21, the mounting layer 5 is not restrained, the sensitivity of the light loss portion 42 to the action of the protruding portion 21 is improved, the finally obtained light loss value is more accurate, and the pressure acting on the pressing layer 2 can also accurately act on the light loss portion 42 due to the arrangement of the protruding portion 21.

In addition, the protruding portion 21 may be made of EVA resin or other materials, and has low strength, so that the optical loss portion 42 is not damaged when the optical loss portion 42 is pressed, thereby improving the service life of the optical fiber sensor 4.

Alternatively, referring to fig. 1, the ratio of the dimension of the protrusions 21 in the thickness direction of the resilient support layer 3 to the thickness of the resilient support layer 3 is < 1.

Specifically, in the present embodiment, when the ratio of the size of the protruding portion 21 in the thickness direction of the elastic support layer 3 to the thickness of the elastic support layer 3 is less than 1, if the pressure applying layer 2 is not subjected to a force, the protruding portion 21 does not contact the optical loss portion 42, and the optical loss portion 42 does not generate a change in optical loss. When the user lies on the sleep monitor mattress 100, the elastic support layer 3 is thinned by the weight, and the convex portion 21 can contact or press the light loss portion 42, causing light loss. Under the condition of different breathing rates and heartbeats of a user, the pressure applied to the optical loss part 42 by the pressure application layer 2 also changes, so that the deformation of the optical loss part 42 has different degrees, the optical loss value generated by the optical loss part 42 also changes according to the different deformation degrees of the optical loss part, and the numerical ranges of the breathing rate, the heartbeats and the body movement can be obtained according to the change of the optical loss value, so that the purpose of monitoring and evaluating the health condition is achieved.

Optionally, the shape of the protruding portion 21 is a cylinder, a hemisphere, a cuboid, or a cone, which may be selected according to actual requirements, and this application is not limited thereto.

Optionally, the shape, material and thickness of the pressure layer 2 and the mounting layer 5 are the same, and the ratio of the thickness of the elastic support layer 3 to the thickness of the pressure layer 2 or the mounting layer 5 is 3/50.

In particular, in this embodiment, the shape, material and thickness of the pressure application layer 2 and the mounting layer 5 are the same, which can save the production cost of the sleep monitoring mattress 100 and improve the production efficiency. In addition, the thickness ratio of the elastic support layer 3 to the pressure application layer 2 or the mounting layer 5 affects the sensitivity of the pressure application layer 2 acting on the light loss part 42 and the comfort of the mattress, and the thickness ratio is set to 3/50, so that on one hand, the sensitivity and accuracy of monitoring can be ensured, and on the other hand, the body feeling of the user can be more comfortable and soft.

Optionally, the pressing layer 2 and the mounting layer 5 are made of PVC material, PC material or PP material, and the elastic support layer 3 is made of EPE material, latex or memory sponge.

In particular, in this embodiment, the pressure applying layer 2 and the mounting layer 5 made of the above materials can ensure good resilience and flexibility, so that the surface of the mattress is smoother, the mechanical properties are more stable, and the service life of the mattress is prolonged. The elastic supporting layer 3 is made of the materials, so that the mattress can rebound to an original state after the external force applied to the elastic supporting layer 3 from the outside is removed, and the comfort of the mattress is improved.

Alternatively, as shown in fig. 5, the optical loss part 42 includes a hose and a precursor filled in the hose, and two segments of the optical fiber body 41 are connected to the precursor through two ends of the hose respectively, and the precursor is polydimethylsiloxane or TPU.

Specifically, in the present embodiment, the light loss section 42 includes a hose, and the hose may be made of a silicone material or a natural rubber composite material. The mattress has stable mechanical property, high temperature resistance, good resilience and higher elongation, so that the range of the sleeping mattress is wider. In addition, the precursor can adopt polydimethylsiloxane prepared by mixing monomers and a curing agent according to the mass ratio of 10. The precursor can also be made of materials with similar properties, such as thermoplastic polyurethane elastomer (TPU), and the application is not limited to this.

Alternatively, referring to fig. 6, the preparation of the optical fiber sensing unit may be performed by the following steps:

firstly, two sections of the optical fiber main body 41 are taken, the optical fiber main body 41 can be a plastic optical fiber, the cladding at one end of the optical fiber main body 41 is stripped by an optical fiber stripping clamp, and the stripped section is polished, referring to S01 in fig. 5.

Taking another section of the hose, referring to S02 and S03 in fig. 5, injecting the precursor into the hose, and inserting one end of each of the two sections of the optical fiber main bodies 41, from which the cladding is stripped, into the precursor from two ends of the hose respectively; wherein the hose is a silicone tube, and the precursor is polydimethylsiloxane.

Finally, referring to S04 in fig. 5, both ends of the flexible tube are heated and cured to manufacture the optical fiber sensing unit. Wherein the temperature for heating and curing is about 80 ℃.

The preparation method of the optical fiber sensing unit is simple and can be suitable for batch production. In practical applications, since the optical fiber sensor 4 includes multiple sections of optical fiber sensing units, the optical fiber main bodies 41 of adjacent optical fiber sensing units can be of an integral structure.

Optionally, as shown in fig. 1 to fig. 3, a protective layer 1 is disposed on each of the pressing layer 2 and the mounting layer 5, which is far away from the elastic support layer 3, and the protective layer 1 is made of a silicone material.

Specifically, in this embodiment, the outer sides of the pressure applying layer 2 and the mounting layer 5 are both provided with the protective layer 1 made of silica gel, so that on one hand, the sleep monitoring mattress 100 can be protected from being damaged by the external environment, the service life of the sleep monitoring mattress is prolonged, and on the other hand, the comfort of the mattress can also be improved.

According to a second aspect of the present application, as in fig. 7 to 8, there is provided a sleep monitoring device comprising: a monitoring circuit 300 and a sleep monitoring mattress 100 as described in any of the above embodiments; the monitoring circuit 300 is connected to the optical fiber sensor 4, and the monitoring circuit 300 can convert the optical loss generated by the optical loss section 42 into an electrical signal.

Specifically, in the present embodiment, the sleep monitor apparatus includes the monitor circuit 300 capable of converting the optical loss generated by the optical loss portion 42 into an electrical signal, and by analyzing and processing the electrical signal, the heart rate and respiration rate, the body movement information, and the like of the user during the use of the sleep monitor mattress 100 can be obtained. The electric wire of the sleep monitoring device provided by the application is not required to be pasted on the human body 200, but is directly connected with the sleep monitoring mattress 100, so that the use cheapness and safety are improved.

Alternatively, referring to fig. 8, the monitoring circuit 300 includes a light source, a driving circuit, and a receiver; the light source is coupled to the first end of the optical fiber sensor 4, and the driving circuit is connected with the light source and can drive the light source to emit light rays with fixed light intensity; the receiver is coupled to the second end of the optical fiber sensor 4, and is configured to receive the light and convert the light intensity of the received light into the electrical signal.

Specifically, in the present embodiment, the light source is coupled to the first end of the optical fiber sensor 4, and the driving circuit can drive the light source to emit light with a fixed intensity, and the light with the fixed intensity is transmitted to the second end of the optical fiber through the first end of the optical fiber and received by the receiver. When the sleep monitor mattress 100 is not in use, i.e. no external pressure is applied to the mattress, the pressure application layer 2 does not apply force to the light loss section 42 of the optical fiber sensor 4, and the light loss section 42 does not generate light loss, and the intensity value of the light received by the receiver is the same as that of the light emitted by the light source or has a variation within a certain threshold value.

When the user lies on the sleep monitor mattress 100, referring to fig. 3, the elastic support layer 3 is compressed by the weight of the human body 200, so that the pressing layer 2 can act on the light loss section 42, causing light loss in the light loss section 42. In one embodiment, the convex portion 21 provided on the pressure applying layer 2 acts on the optical loss section 42 to bend and deform the optical loss section 42, and optical loss occurs. According to the difference of the heart rate and the breathing rate, the pressure applied to the optical loss part 42 by the pressure applying layer 2 is different, so that the optical loss value generated in the optical loss part 42 is also changed, meanwhile, the intensity value of the light finally received by the receiver is also changed compared with the intensity value of the light emitted by the light source, the change of the intensity value of the light is converted into the change of an electric signal, and the heart rate, the breathing rate, the body movement information and the like of the user can be measured. And the change of the optical loss value is converted into the change of an electric signal, so that the final data can be processed and analyzed conveniently.

Wherein the light source may be selected from an LED light source, for example IF-E96E (industrial fiber optics, USA) for us industry, which generates visible light with a peak of 645nm, which is encapsulated in a plastic material of the "connectorless" type, which is connectionless couplable to the fiber sensor 4. Alternatively, the receiver may employ a photodiode, such as IF-D91B (Industrial Fiber Optics, USA) which is also encapsulated in a plastic material known as "connectorless" and which is also connectionless coupled to the fibre optic sensor 4, having an optical response in the range 450nm to 1100nm, and which is operable to receive a red LED at 650 nm.

Optionally, the receiver converting the received light intensity of the light into an electrical signal includes: amplifying the received light intensity and converting the change in light intensity into a change in current and converting the change in current into a change in voltage to form the electrical signal.

In particular, the electrical signal obtained by the receiver from the sleep monitoring mattress 100 (the optical fiber sensor 4) is very weak, and needs to be amplified. In this embodiment, the change of the light intensity can be converted into the change of the current by using the two-stage amplification circuit, and then the converted change of the current is converted into the change of the voltage by using the transimpedance amplifier. In one embodiment, the receiver uses a photodiode, the light intensity of which is in direct proportion to the current, in order to ensure the stability of the light intensity, a constant voltage source can be designed in the circuit to maintain the stability of the current, the constant voltage source is realized by a low-dropout linear regulator, which has a high power supply rejection ratio and good load transient, the current can be maximally driven to 100mA, and the receiver is very suitable for being used as a constant voltage source to drive the photodiode. In another embodiment, the receiver may further include a single chip for storing the raw signal acquired by the receiver.

Optionally, referring to fig. 8, the monitoring circuit 300 further includes a bluetooth module, which is connected to the receiver and can transmit the electrical signal to an external data processing module.

Specifically, in this embodiment, the monitoring circuit 300 further includes a bluetooth module for completing data communication, so that the operation of the sleep monitoring device is simpler and more convenient. In one embodiment, the receiver comprises a single chip microcomputer, the bluetooth module can comprise a host and a slave, the single chip microcomputer is connected with the bluetooth slave through a serial port and sends the acquired original signals, and the bluetooth host can be connected with an external data processing module to achieve data communication.

In practical application, the bluetooth master device and the bluetooth slave device can be set by using an AT command, pairing is required to realize communication between the master device and the slave device, a master-slave mode of the two devices is set by using the AT command, passwords of the master device and the slave device are set to be consistent, and the bluetooth master device and the bluetooth slave device can be automatically paired. The external data processing module can adopt a computer which is connected with the Bluetooth host equipment through a USB, firstly, the USB level is converted into the TTL level, and then, the communication between the Bluetooth host and the Bluetooth slave is completed.

In general, since the light intensity of the optical fiber sensor 4 caused by body movement is much larger than the light intensity caused by respiration and heartbeat, the body movement signal and the respiration and heartbeat signal can be separated by setting a threshold. In addition, the acquired respiration signals and the heartbeat signals are overlapped, but the normal frequency ranges of the respiration signals and the heartbeat signals are not intersected, so that the respiration rate and the heart rate can be determined by respectively searching peak values in the frequency ranges of the respiration signals and the heartbeat signals through frequency domain conversion of the acquired signals.

Specifically, the user is required to lie still in bed while the raw signal is being acquired. At the moment, the signals acquired by the receiver are signals obtained by mixing respiratory and heartbeat information, and the amplitude of the respiratory signals is far larger than that of the heartbeat signals, so that the acquired signals can be visually seen, and generally, a person breathes 12 to 20 times per minute, the corresponding frequency is 0.2Hz to 0.33Hz, the heart rate beats 50 to 100 times per minute, and the corresponding frequency is converted into the frequency of 0.83Hz to 1.67Hz.

Respiration and heartbeat have two different frequency bands, so these two signals can be separated by a filter to get the respective actual waveforms. And performing frequency domain conversion on the acquired signals, and respectively searching peaks from 0.1Hz to 0.5Hz and 0.7Hz to 3Hz to obtain the times of respiration and heart beats per minute. The collected signals are converted into frequency domain by using Power Spectral Density (PSD), and then the respiratory and heartbeat signals are separated by using a digital filter, and considering that the higher the order of the filter is, the faster the pass band and stop band of the filter change, a butterworth filter with the order of 10 can be selected.

The mattress was placed close to the heart and 20s of data was collected for analysis, as shown in fig. 9, which is raw data, only the thoracic and abdominal respiration signals were seen because the thoracic and abdominal respiration amplitude was much larger than the heartbeat amplitude, and fig. 10 shows that the PSD was calculated using Welch, which shows that the highest frequency of the respiration band was 0.214Hz, i.e., 12.8 breaths per minute, and the highest frequency of the heartbeat band was 0.98Hz, i.e., 58.7 heartbeats per minute. Fig. 11 and 12 show the thoracic and abdominal respiration and heartbeat waveforms extracted through the IIR filter, and the thoracic and abdominal respiration waveform is relatively large in amplitude and thus can be easily seen.

According to the analysis, the sleep monitoring mattress 100 is convenient to use and high in safety, and when the sleep monitoring mattress is used in a sleep monitoring device, the original information of the breath and the heartbeat of a user can be accurately acquired, so that the heart rate and the breath rate can be finally and quickly identified, and the body movement information can be distinguished, so that the sleep condition of the user can be better monitored, and the physical health condition of the user can be better evaluated.

In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims

1. The utility model provides a sleep monitoring mattress which characterized in that includes in proper order:

2. The sleep monitoring mattress of claim 1,

a convex part is arranged at a position, corresponding to each light loss part, on the pressure application layer, a first hollowed-out area is arranged at a position, corresponding to each convex part, on the elastic supporting layer, a second hollowed-out area is arranged at a position, corresponding to each light loss part, on the mounting layer, and the convex part penetrates through the first hollowed-out area and is arranged opposite to the light loss part;

3. The sleep monitoring mattress of claim 2, wherein a ratio of a dimension of the protrusions in a thickness direction of the resilient support layer to a thickness of the resilient support layer is < 1.

4. The sleep monitoring mattress of claim 2, wherein the raised portion is in the shape of a cylinder, hemisphere, cuboid, or cone.

5. The sleep monitoring mattress as claimed in claim 1, characterized in that the pressing layer and the attachment layer are identical in shape, material and thickness, and the ratio of the thickness of the resilient support layer to the thickness of the pressing layer or the attachment layer is 3/50.

6. The sleep monitoring mattress according to claim 5, characterized in that the pressing layer and the pasting layer are made of PVC material, PC material or PP material, and the elastic supporting layer is made of EPE material, latex or memory sponge.

7. The sleep monitor mattress according to claim 1, wherein the optical loss part comprises a hose and a precursor filled in the hose, two segments of the optical fiber main body are respectively connected to the precursor through two ends of the hose, and the precursor is polydimethylsiloxane or TPU.

8. The sleep monitoring mattress of claim 7, wherein the optical fiber sensing unit is prepared by:

9. The sleep monitoring mattress as recited in claim 1, wherein the pressing layer and the mounting layer are provided with protective layers on the sides thereof away from the elastic support layer, and the protective layers are made of silica gel material.

10. A sleep monitoring device, comprising: a monitoring circuit and a sleep monitoring mattress according to any one of claims 1 to 9;

11. The sleep monitoring device as in claim 10, wherein the monitoring circuit comprises a light source, a drive circuit, and a receiver;

12. The sleep monitoring device as in claim 11, wherein the receiver converting the received light intensity of the light into an electrical signal comprises:

13. The sleep monitoring device as in claim 11, wherein the monitoring circuit further comprises a bluetooth module connected to the receiver and capable of transmitting the electrical signal to an external data processing module.