CN103622671B - Noncontact physiology or periodically force signals harvester and mat - Google Patents

Abstract

The invention provides a non-contact physiological or periodic force signal acquisition device and a mat. The device may include: a flexible body, a tension sensor and a signal processing unit; the flexible body includes a flexible body panel and a hollow capsule, and the hollow capsule is arranged in the flexible body panel; the human body pressure borne by the flexible body panel The tension of the hollow capsule wall is converted into the tension of the hollow capsule wall by the hollow capsule; the tension sensor is also arranged in the flexible body panel, and generates an electrical signal according to the tension of the capsule wall; the signal processing unit processes and obtains the electrical signal Physiological signals or periodic force signals of the human body. The invention can make the acquisition of physiological signals or periodic force signals more convenient and more accurate.

Description

Non-contact physiological or periodic force signal acquisition device and mat

technical field

The invention relates to a physiological signal collection technology or a periodical force quantitative collection technology, in particular to a non-contact physiological or periodic force signal collection device and a mat.

Background technique

The human physiological signal acquisition device in the prior art needs to closely contact the signal electrode with the human skin to collect the pressure signal generated by the muscles and convert it into an electrical signal for processing to obtain important physiological signals of the human body, such as heartbeat, breathing and convulsions and other physiological signals.

The above-mentioned human physiological signal collection device needs to be in close contact with the human skin during the collection of physiological signals, which will bring a lot of inconvenience to the user during use; at the same time, the signal electrodes need to be pasted on the surface of the human skin during collection. , different impedances may be formed due to different positions of the human skin pasted each time, resulting in unstable strength (amplitude) of the collected signal, making it impossible to accurately collect the required physiological signals, such as the strength information of the heartbeat, etc. .

Contents of the invention

The main purpose of the present invention is to provide a non-contact physiological signal acquisition device to improve the convenience of physiological signal acquisition.

The present invention proposes a non-contact physiological signal acquisition device, including: a flexible body, a tension sensor and a signal processing unit;

The flexible body includes a flexible body panel and a hollow capsule, and the hollow capsule is arranged in the flexible body panel; the human body pressure borne by the flexible body panel is converted into the tension of the hollow capsule wall through the hollow capsule;

The tension sensor is also arranged in the flexible body panel, and generates an electrical signal according to the tension of the capsule wall;

The signal processing unit processes the electrical signal to obtain physiological signals of the human body.

Preferably, the hollow capsule is formed by the tip portion of a sphere or a flat cavity structure.

Preferably, gas or liquid is placed in the hollow capsule to convert the pressure of the human body borne by the flexible body panel into the tension of the hollow capsule wall.

Preferably, the tension sensor is provided with a piezoelectric film; the piezoelectric film is provided on the inner or outer wall of the hollow capsule.

The present invention also proposes a non-contact physiological signal acquisition mat, in which at least one non-contact physiological signal acquisition device and a wireless transparent transmission circuit are arranged;

The non-contact physiological signal acquisition device includes: a flexible body, a tension sensor and a signal processing unit; the flexible body includes a flexible body panel and a hollow capsule, and the hollow capsule is arranged in the flexible body panel; the flexible body The human body pressure borne by the panel is converted into the tension of the hollow capsule wall through the hollow capsule; the tension sensor is also arranged in the flexible body panel, and generates an electrical signal according to the tension of the capsule wall; the signal processing unit The electrical signal is processed to obtain the physiological signal of the human body;

The wireless transparent transmission circuit transmits the digital signal wirelessly.

Preferably, the hollow capsule is formed by the tip portion of a sphere or a flat hollow structure.

Preferably, gas or liquid is placed in the hollow capsule to convert the pressure of the human body borne by the flexible body panel into the tension of the hollow capsule wall.

Preferably, the tension sensor is provided with a piezoelectric film; the piezoelectric film is provided on the inner or outer wall of the hollow capsule.

The present invention also proposes a periodic force signal acquisition device, including: a flexible body, a tension sensor and a signal processing unit;

The flexible body includes a flexible body panel and a hollow capsule, and the hollow capsule is arranged in the flexible body panel; the periodic force borne by the flexible body panel is converted into the force of the hollow capsule wall by the hollow capsule. tension;

The tension sensor is also arranged in the flexible body panel, and generates an electrical signal according to the tension of the capsule wall;

The signal processing unit processes the electrical signal to obtain the magnitude of the periodic force.

Preferably, the device also includes:

The judging unit judges whether the acquired periodic force is within the range according to the set range of the periodic force; when it exceeds the set range, an alarm signal is generated.

Preferably, the hollow capsule is formed by the tip portion of a sphere or a flat cavity structure.

Preferably, gas or liquid is placed in the hollow capsule to convert the pressure of the human body borne by the flexible body panel into the tension of the hollow capsule wall.

Preferably, the tension sensor is provided with a piezoelectric film; the piezoelectric film is provided on the inner or outer wall of the hollow capsule.

The present invention can convert human body pressure (weak changes) into electrical signals and process them through the flexible body, so as to obtain the physiological signals of the human body (heartbeat and breathing, etc.) Acquisition is more convenient; at the same time, wireless technology is used to transmit the acquired physiological signals to remote devices, and the separation of signal acquisition from further analysis or unified storage operations further facilitates the acquisition of physiological signals.

Description of drawings

Fig. 1 is a schematic diagram of functional modules in an embodiment of the non-contact physiological signal acquisition device of the present invention;

Fig. 2 is a schematic structural view of the flexible body panel in an embodiment of the non-contact physiological signal acquisition device of the present invention;

Fig. 3 is a schematic diagram of the force on the wall of the hollow capsule in an embodiment of the non-contact physiological signal acquisition device of the present invention;

Fig. 4 is a schematic diagram of force analysis of the hollow capsule wall in an embodiment of the non-contact physiological signal acquisition device of the present invention;

Fig. 5 is a schematic diagram of the curvature radius ratio and tension coefficient change of the hollow capsule wall under force in an embodiment of the non-contact physiological signal acquisition device of the present invention;

6 is a schematic diagram of the functional modules of the signal processing unit in another embodiment of the non-contact physiological signal acquisition device of the present invention;

Fig. 7 is a schematic diagram of functional modules in another embodiment of the non-contact physiological signal acquisition device of the present invention;

Fig. 8 is a schematic diagram of functional modules in an embodiment of the non-contact physiological signal collection mat of the present invention;

Fig. 9 is a schematic diagram of functional modules in an embodiment of the periodic force signal acquisition device of the present invention;

Fig. 10 is a schematic structural view of the flexible surface material in an embodiment of the periodic force signal acquisition device of the present invention;

Fig. 11 is a schematic diagram of functional modules in another embodiment of the periodic force signal acquisition device of the present invention.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Referring to Fig. 1, an embodiment of a non-contact physiological signal acquisition device of the present invention is proposed. The non-contact physiological signal acquisition device may include: a flexible body 11, a tension sensor 12 and a signal processing unit 13; the flexible body 11 includes a flexible body panel 111 and a hollow capsule 112, and the hollow capsule 112 is arranged on the flexible body panel 111 middle; the human body pressure borne by the flexible body panel 111 is transformed into the tension of the wall of the hollow capsule body 112 through the hollow capsule body 112; the tension sensor 12 is also arranged in the flexible body panel 111, and generates an electrical signal according to the tension force of the capsule body wall ; The signal processing unit 13 processes the electrical signal to obtain the physiological signal of the human body.

In the actual production of the non-contact physiological signal acquisition device of this embodiment, the flexible body 11 can be integrated, and the flexible body panel 111 and the hollow air bag 112 can be integrally formed, and the two are described separately for convenience of description.

Referring to FIG. 2 , it is assumed that the above-mentioned flexible body panel 111 is strip-shaped, and the strip-shaped flexible body panel 111 at least includes an upper bottom surface and a lower bottom surface, and a flexible material with a certain thickness is between the upper bottom surface and the lower bottom surface, A hollow bladder 112 is disposed in the flexible material of certain thickness. The hollow capsule 112 can be disposed between the upper bottom surface and the lower bottom surface. A plurality of hollow capsules 112 may be disposed in the flexible body panel 111 , and a spacer region 113 may be disposed between two of the plurality of hollow capsules 112 .

The above-mentioned hollow capsule 112 is filled with gas or liquid, which converts the human body pressure borne by the flexible body panel 111 into the tension of the hollow capsule wall. The volume of gas or liquid in the airtight hollow capsule 112 is constant. When the hollow capsule 112 is pressurized, the internal pressure changes accordingly. The tension sensor 12 constituting the capsule wall can sense the pressure at high speed and continuously output specific changing values. The micro-movements of the human body above the capsule 112 accompanied by respiration and heartbeat cause the pressure in the capsule to change regularly with these micro-movements, and information such as breathing rate, heart rate, and rolling motion can be reflected in the changes.

Referring to FIG. 3 , it is a schematic diagram of the force on the wall of the hollow bladder 112 ; the pressure of the human body subjected to the hollow bladder 112 is converted into the tension of the wall of the hollow bladder 112 .

Referring to Fig. 4, it is a schematic diagram of force analysis of the wall of the hollow capsule 112; the piezoelectric film is wrapped on the outside of the airtight hollow capsule 112, and the pressure of the hollow capsule 112 causes a slight change in the internal pressure, and the tension on the surface of the hollow capsule 112 It also changes accordingly, and if the radius of curvature of the hollow capsule 112 is larger, the tension caused by the same air pressure is larger (the tension coefficient is larger).

With reference to Fig. 5, it is shown that the radius of curvature ratio of the wall of hollow capsule 112 and the schematic diagram of tension coefficient change; above-mentioned hollow capsule 112 also can be designed as a fraction of a larger sphere, such as intercepting the top of the sphere as a hollow capsule 112 , a hollow capsule 112 with a partially arc-shaped inner wall is formed, so that a larger tension coefficient can be obtained, and a sensor with much superior performance than that of a flexible bridge structure embedded with a piezoelectric film can be obtained. The bridge structure can be provided with supporting structures at both ends of the flexible body panel 111. When the flexible body panel 111 is pressed (human body pressure), the middle part of the flexible body panel 111 is naturally deformed (depressed) due to the support at both ends, so that the The pressure of the human body is converted into tensile force, which is converted into electrical signals by pressure sensors such as piezoelectric films, and the physiological parameters of the human body are obtained after processing such as filtering and analysis.

The above-mentioned non-contact physiological signal acquisition device can use the piezoelectric film to form a flexible airtight air bag or liquid bag, and when the air bag or liquid bag is squeezed, the pressure in the air bag will change, thereby changing the tension on the piezoelectric film, so as to obtain a clear, An electrical signal closely related to the frequency and intensity of pressure that is amplified and band-pass filtered to obtain relevant information such as heartbeat, respiration, convulsions, and/or movement. The electrical signal is an analog electrical signal.

For example, to obtain the heartbeat signal, since the frequency range of the human heartbeat signal is about 0.7Hz~3Hz, by setting the parameters of the digital filter, 0.7Hz~3Hz can be considered Other signals, such as 0.2Hz~0.7Hz breathing signal; through amplitude discrimination, signals such as convulsions and movement can be considered, so as to obtain a simple and clear heartbeat signal, which can be digitized and then Fourier transformed to read the spectrum directly The maximum value, you can get accurate heart rate data. In the same way, accurate breathing rate data can be obtained only by changing the parameters of the amplification and filtering; by analyzing the amplitude and the phase of the moving signal of the sensor, it is possible to know whether the human subject using the device is twitching, getting up, or Sit, lie down, etc.

The above-mentioned flexible body 11 can be arranged in daily utensils such as mattresses, seat cushions, back cushions and foot pads, and is used to obtain the user's body pressure when the user uses the aforementioned daily utensils. The user can use it anytime and anywhere in daily life, which is very convenient.

With reference to Fig. 6, in another embodiment, above-mentioned signal processing unit 13 can comprise: signal amplifying circuit 131, filtering and analyzing circuit 132 and A/D conversion circuit 133; This signal amplifying circuit 131 amplifies described analog electric signal The filtering and analysis circuit 132 filters the amplified analog electrical signal to obtain the required physiological signal of the human body; the A/D conversion circuit 133 converts the filtered analog electrical signal into a digital signal.

The above-mentioned signal amplification circuit 131 can be connected with the above-mentioned tension sensor 12 to amplify the electrical signal generated by the tension sensor 12 so as to filter the electrical signal. The degree of amplification of the electrical signal by the signal amplification circuit 131 can be determined according to specific requirements.

The filter and analysis circuit 132 may be connected to the signal amplifying circuit 131 to filter the electrical signal amplified by the signal amplifying circuit 131 . The filtering and analysis circuit 132 can filter out unnecessary signal frequency bands by setting corresponding parameters to obtain required electrical signals. For example, it can filter out signals other than 0.7Hz~3Hz to obtain heartbeat signals (usually 0.7Hz~3Hz ). The filtering and analysis circuit 132 can filter the electrical signal by setting parameters such as frequency to obtain the required physiological signal.

The above-mentioned A/D conversion circuit 133 can be connected with the above-mentioned filter and analysis circuit 132, and can convert the filtered electrical signal from an analog signal to a digital signal. Since the electrical signal generated by the tension sensor 12 is usually an analog electrical signal, the filtered electrical signal is also an analog electrical signal. The A/D conversion circuit 133 can convert the analog electrical signal into a digital signal, which is convenient for further processing and transmission of the signal.

Referring to FIG. 7 , in another embodiment, the above device further includes: a wireless transparent transmission circuit 14 , which transmits the digital signal through wireless transparent transmission.

In order to enhance the convenience of collecting the physiological signals of the human body, the collection of the physiological signals can be separated from the further analysis or unified storage of the physiological signals. After the required physiological signal is collected, the physiological signal can be transmitted to a remote device through the wireless transparent transmission circuit 14 for further analysis or unified storage.

The above device further includes: a power supply unit (not shown in the figure) and a power management unit (not shown in the figure); the power supply unit provides power; the power management unit manages the power supply unit.

The above-mentioned power supply unit can be a storage battery, and can provide power for the above-mentioned device. The device manages the battery through the power management unit.

The above-mentioned power supply unit can also be a connection component connected to an external power supply, and can provide power for the above-mentioned device by connecting to the external power supply. The device manages the connected components through the aforementioned power management unit.

In an example of this embodiment, the above-mentioned non-contact physiological signal acquisition device can be applied to a mattress, and the mattress can include at least one piezoelectric film sensor, distributed according to a distance of 10-15 centimeters, about 10 with a diameter of 20-25 mm , a hollow capsule 112 with a height of 1-2mm (cutting the part with a diameter of 20-25mm at the top of the sphere at a height of 1-2mm), a piezoelectric film forms a certain surface of the soft and airtight hollow capsule 112, and continuously collects air pressure signals, through different The parameter digital filter can clearly obtain the digital signal showing the heartbeat and breathing situation, and calculate through the signal analysis circuit, send the result to the wireless transparent transmission module, and finally send it to the Internet database through the router. The above data not only contains the heartbeat of the user when he sleeps From these data, you can also obtain data related to falling asleep and waking up, movement data during night sleep, and even judge the occurrence of convulsions, and make a rough assessment of sleep quality. The above-mentioned hollow capsule can also be a flat cavity structure.

The acquisition device includes a conversion mechanism from pressure to pressure and then to tension, an analog signal amplifier, a digital filter, a signal analysis circuit, a wireless transparent transmission circuit, a battery and a power management circuit. It can include: tension sensor 12, analog signal processing module, digital filter, signal analysis circuit, wireless transparent transmission circuit and so on. It can clearly obtain important physiological information such as heartbeat, respiration and/or convulsions without direct contact with human skin, and can also obtain simple information about human body movement within a certain range, including frequency and amplitude.

The above-mentioned non-contact physiological signal acquisition device converts (weak changes in) human body pressure into electrical signals through the flexible body 11 and processes them, so as to obtain human body physiological signals (such as heartbeat and respiration, etc.) ), making the acquisition of physiological signals more convenient; at the same time, using wireless technology to transmit the acquired physiological signals to remote devices, separating signal acquisition from further analysis or unified storage, and further facilitating the acquisition of physiological signals.

Referring to FIG. 8 , an embodiment of a non-contact physiological signal collection mat of the present invention is proposed. The mat can be provided with at least one non-contact physiological signal acquisition device and wireless transparent transmission circuit; the non-contact physiological signal acquisition device can include: a flexible body 11, a tension sensor 12 and a signal processing unit 13; the flexible body 11 includes a flexible body The panel 111 and the hollow capsule 112, the hollow capsule 112 is arranged in the flexible body panel 111; the human body pressure borne by the flexible body panel 111 is converted into the tension of the wall of the hollow capsule 112 through the hollow capsule 112; the tension sensor 12 It is also arranged in the flexible body panel 111 to generate electrical signals according to the tension of the wall of the capsule body 112; the signal processing unit 13 processes the electrical signals to obtain physiological signals of the human body; the wireless transparent transmission circuit 14 transmits digital signals wirelessly out.

In the actual production of the non-contact physiological signal acquisition device of this embodiment, the flexible body 11 can be integrated, and the flexible body panel 111 and the hollow air bag 112 can be integrally formed, and the two are described separately for convenience of description.

Referring to FIG. 2 , it is assumed that the above-mentioned flexible body panel 111 is strip-shaped, and the strip-shaped flexible body panel 111 at least includes an upper bottom surface and a lower bottom surface, and a flexible material with a certain thickness is between the upper bottom surface and the lower bottom surface, A hollow bladder 112 is disposed in the flexible material of certain thickness. The hollow capsule 112 can be disposed between the upper bottom surface and the lower bottom surface, or protrude from the upper bottom surface and/or the lower bottom surface of the panel. A plurality of hollow capsules 112 may be disposed in the flexible body panel 111 , and a spacer region 113 may be disposed between two of the plurality of hollow capsules 112 .

The above-mentioned hollow capsule 112 is filled with gas or liquid, which converts the human body pressure borne by the flexible body panel 111 into the tension of the hollow capsule wall. The volume of gas or liquid in the airtight hollow capsule 112 is constant. When the hollow capsule 112 is pressurized, the internal pressure changes accordingly. The tension sensor 12 constituting the capsule wall can sense the pressure at high speed and continuously output specific changing values. The micro-movements of the human body above the capsule 112 accompanied by respiration and heartbeat cause the pressure in the capsule to change regularly with these micro-movements, and information such as breathing rate, heart rate, and rolling motion can be reflected in the changes.

Referring to FIG. 3 , it is a schematic diagram of the force on the wall of the hollow bladder 112 ; the pressure of the human body subjected to the hollow bladder 112 is converted into the tension of the wall of the hollow bladder 112 .

Referring to Fig. 4, it is a schematic diagram of force analysis of the wall of the hollow capsule 112; the piezoelectric film is wrapped on the outside of the airtight hollow capsule 112, and the pressure of the hollow capsule 112 causes a slight change in the internal pressure, and the tension on the surface of the hollow capsule 112 It also changes accordingly, and if the radius of curvature of the hollow capsule 112 is larger, the tension caused by the same air pressure is larger (the tension coefficient is larger).

With reference to Fig. 5, it is shown that the radius of curvature ratio of the wall of hollow capsule 112 and the schematic diagram of tension coefficient change; above-mentioned hollow capsule 112 also can be designed as a fraction of a larger sphere, such as intercepting the top of the sphere as a hollow capsule 112 , a hollow capsule 112 with a partially arc-shaped inner wall is formed, so that a larger tension coefficient can be obtained, and a sensor with much superior performance than that of a flexible bridge structure embedded with a piezoelectric film can be obtained. The bridge structure can be provided with supporting structures at both ends of the flexible body panel 111. When the flexible body panel 111 is pressed (human body pressure), the middle part of the flexible body panel 111 is naturally deformed (depressed) due to the support at both ends, so that the The pressure of the human body is converted into tensile force, which is converted into electrical signals by pressure sensors such as piezoelectric films, and the physiological parameters of the human body are obtained after processing such as filtering and analysis.

The above-mentioned non-contact physiological signal acquisition device can use the piezoelectric film to form a flexible airtight air bag or liquid bag, and when the air bag or liquid bag is squeezed, the pressure in the air bag will change, thereby changing the tension on the piezoelectric film, so as to obtain a clear, An electrical signal closely related to the frequency and intensity of pressure that is amplified and band-pass filtered to obtain relevant information such as heartbeat, respiration, convulsions, and/or movement. The electrical signal is an analog electrical signal.

For example, to obtain the heartbeat signal, since the frequency range of the human heartbeat signal is about 0.7Hz~3Hz, by setting the parameters of the digital filter, 0.7Hz~3Hz can be considered Other signals, such as 0.2Hz~0.7Hz breathing signal; through amplitude discrimination, signals such as convulsions and movement can be considered, so as to obtain a simple and clear heartbeat signal, which can be digitized and then Fourier transformed to read the spectrum directly The maximum value, you can get accurate heart rate data. In the same way, accurate breathing rate data can be obtained only by changing the parameters of the amplification and filtering; by analyzing the amplitude and the phase of the moving signal of the sensor, it is possible to know whether the human subject using the device is twitching, getting up, or Sit, lie down, etc.

The above-mentioned flexible body 11 can be arranged in daily utensils such as mattresses, seat cushions, back cushions and foot pads, and is used to obtain the user's body pressure when the user uses the aforementioned daily utensils. The user can use it anytime and anywhere in daily life, which is very convenient.

With reference to Fig. 6, in another embodiment, above-mentioned signal processing unit 13 can comprise: signal amplifying circuit 131, filtering and analyzing circuit 132 and A/D conversion circuit 133; This signal amplifying circuit 131 amplifies described analog electric signal The filtering and analysis circuit 132 filters the amplified analog electrical signal to obtain the required physiological signal of the human body; the A/D conversion circuit 133 converts the filtered analog electrical signal into a digital signal.

The above-mentioned signal amplification circuit 131 can be connected with the above-mentioned tension sensor 12 to amplify the electrical signal generated by the tension sensor 12 so as to filter the electrical signal. The degree of amplification of the electrical signal by the signal amplification circuit 131 can be determined according to specific requirements.

The filter and analysis circuit 132 may be connected to the signal amplifying circuit 131 to filter the electrical signal amplified by the signal amplifying circuit 131 . The filtering and analysis circuit 132 can filter out unnecessary signal frequency bands by setting corresponding parameters to obtain required electrical signals. For example, it can filter out signals other than 0.7Hz~3Hz to obtain heartbeat signals (usually 0.7Hz~3Hz ). The filtering and analysis circuit 132 can filter the electrical signal by setting parameters such as frequency to obtain the required physiological signal.

The above-mentioned A/D conversion circuit 133 can be connected with the above-mentioned filter and analysis circuit 132, and can convert the filtered electrical signal from an analog signal to a digital signal. Since the electrical signal generated by the tension sensor 12 is usually an analog electrical signal, the filtered electrical signal is also an analog electrical signal. The A/D conversion circuit 133 can convert the analog electrical signal into a digital signal, which is convenient for further processing and transmission of the signal.

The above-mentioned wireless transparent transmission circuit 14 transmits the digital signal through wireless transparent transmission. In order to enhance the convenience of collecting the physiological signals of the human body, the collection of the physiological signals can be separated from the further analysis or unified storage of the physiological signals. After the required physiological signal is collected, the physiological signal can be transmitted to a remote device through the wireless transparent transmission circuit 14 for further analysis or unified storage.

The above non-contact physiological signal acquisition device further includes: a power supply unit (not shown in the figure) and a power management unit (not shown in the figure); the power supply unit provides power; the power management unit manages the power supply unit.

The above-mentioned power supply unit can be a storage battery, and can provide power for the above-mentioned device. The device manages the battery through the power management unit.

The above-mentioned power supply unit can also be a connection component connected to an external power supply, and can provide power for the above-mentioned device by connecting to the external power supply. The device manages the connected components through the aforementioned power management unit.

In an example of this embodiment, the above-mentioned non-contact physiological signal acquisition device can be applied to a mattress, and the mattress can include at least one piezoelectric film sensor, distributed according to a distance of 10-15 centimeters, about 10 with a diameter of 20-25 mm , a hollow capsule 112 with a height of 1-2mm (cutting the part with a diameter of 20-25mm at the top of the sphere at a height of 1-2mm), a piezoelectric film forms a certain surface of the soft and airtight hollow capsule 112, and continuously collects air pressure signals, through different The parameter digital filter can clearly obtain the digital signal showing the heartbeat and breathing situation, and calculate through the signal analysis circuit, send the result to the wireless transparent transmission module, and finally send it to the Internet database through the router. The above data not only contains the heartbeat of the user when he sleeps From these data, you can also obtain data related to falling asleep and waking up, movement data during night sleep, and even judge the occurrence of convulsions, and make a rough assessment of sleep quality. The above-mentioned hollow capsule can also be a flat cavity structure.

The above-mentioned cushion may include a conversion mechanism from pressure to pressure and then to tension, an analog signal amplifier, a digital filter, a signal analysis circuit, a wireless transparent transmission circuit, a battery and a power management circuit. It can include: tension sensor 12, analog signal processing module, digital filter, signal analysis circuit, wireless transparent transmission circuit and so on. It can clearly obtain important physiological information such as heartbeat, respiration and/or convulsions without direct contact with human skin, and can also obtain simple information about human body movement within a certain range, including frequency and amplitude.

The above-mentioned non-contact physiological signal collection mat converts the pressure (weak changes) of the human body into electrical signals through the flexible body 11 and processes them, so as to obtain the physiological signals of the human body (such as heartbeat and respiration, etc.) ), making the acquisition of physiological signals more convenient; at the same time, using wireless technology to transmit the acquired physiological signals to remote devices, separating signal acquisition from further analysis or unified storage, and further facilitating the acquisition of physiological signals.

Referring to FIG. 9 , an embodiment of a periodic force signal acquisition device of the present invention is proposed. The periodic force signal acquisition device may include: a flexible body 21, a tension sensor 22 and a signal processing unit 23; the flexible body 21 includes a flexible body surface material 211 and a hollow capsule 212, and the hollow capsule 212 is arranged on the flexible body surface Among the materials 211; the periodic force borne by the flexible body surface material 211 is transformed into the tension force of the wall of the hollow capsule body 212 through the hollow capsule body 212; the tension sensor 22 is also arranged in the flexible body surface material 211, according to the capsule body wall The tension generated by the electric signal; the signal processing unit 23 processes the electric signal to obtain the magnitude of the periodic force.

Referring to FIG. 10 , it is assumed that the above-mentioned flexible body surface material 211 is elongated, and the elongated flexible body surface material 211 at least includes an upper bottom surface and a lower bottom surface, and there is a flexible material with a certain thickness between the upper bottom surface and the lower bottom surface, A hollow bladder 212 is disposed in the flexible material of certain thickness. The hollow capsule 212 can be disposed between the upper bottom surface and the lower bottom surface, or protrude from the upper bottom surface and/or the lower bottom surface of the flexible body surface material 211 . A plurality of hollow capsules 212 may be disposed in the flexible body surface material 211 , and a spacer region 113 may be disposed between two of the plurality of hollow capsules 212 .

In this embodiment, in the measurement of the periodic force action, it is possible to simplify the use of a single hollow capsule 212 as the sensing body, and the piezoelectric film can be used to form a flexible airtight air bag or liquid bag, and when the air bag or liquid bag is squeezed Change the pressure in the airbag to change the tension on the piezoelectric film, so as to obtain a clear electrical signal closely related to the frequency and intensity of the pressure, and then amplify the electrical signal and band-pass filter to obtain the force. size.

Referring to Fig. 11, the above-mentioned device may also include: a judging unit 24, which judges whether the acquired periodic force is within the range according to the set periodical force size range; when exceeding the set range, an alarm signal is generated .

In a specific example, the above-mentioned hollow capsule 212 can be a hollow structure with a height of 3 mm (usually 2-4 mm) (a section with a height of 3 mm from the top of a sphere with a diameter of 603 mm is intercepted), and the diameter of the bottom surface of the intercepted sphere is about 60mm; the top of the hollow capsule 212 with a wall thickness of 1mm\diameter about 603mm and a height of 3mm is used as a sensor carrier, and the inner wall of the hollow capsule 212 is equipped with a piezoelectric film sensor. Carry out cardiopulmonary resuscitation on the patient's chest, and periodically press the chest with the hollow capsule 212, which can accurately measure the change and cycle of the pressing force. Appropriate, and provide reference and reminder for rescuers. The above-mentioned hollow capsule can also be a flat cavity structure.

Referring to FIG. 3 , it is a schematic diagram of the force on the wall of the hollow bladder 212 ; the pressure of the human body on the hollow bladder 212 is converted into the tension of the wall of the hollow bladder 212 .

Referring to Fig. 4, it is a schematic diagram of force analysis of the wall of the hollow capsule body 212; the piezoelectric film is wrapped on the outside of the airtight hollow capsule body 212, and the pressure of the hollow capsule body 212 causes a slight change in the internal pressure, and the tension on the surface of the hollow capsule body 212 It also changes accordingly, and if the radius of curvature of the hollow capsule 212 is larger, the tension caused by the same air pressure is larger (the tension coefficient is larger).

Referring to Fig. 5, it is shown that the radius of curvature ratio of the wall of the hollow capsule 212 and the schematic diagram of the change of the tension coefficient; the above-mentioned hollow capsule 212 can also be designed as a small part of a larger sphere, such as intercepting the top of the sphere as a hollow capsule 212, forming a hollow capsule 212 with a partially arc-shaped inner wall, so that a larger tension coefficient can be obtained, and a sensor with much better performance than a flexible bridge structure or the like embedded with a piezoelectric film can be obtained. The bridge structure can be provided with support structures at both ends of the flexible body surface material 211. When the flexible body surface material 211 is under pressure (human body pressure), the middle part of the flexible body surface material 211 is naturally deformed (depressed) due to the support at both ends, so that the The pressure of the human body is converted into tensile force, which is converted into an electrical signal by a pressure sensor such as a piezoelectric film, and the magnitude of the force is obtained after processing.

The above periodic force signal acquisition device can use the piezoelectric film to form a flexible airtight air bag or liquid bag. When the air bag or liquid bag is squeezed, the pressure in the air bag will change, thereby changing the tension on the piezoelectric film, so as to obtain a clear , The electrical signal closely related to the magnitude of the pressure, and after processing the electrical signal, the magnitude of the periodic force can be obtained for reference by the force applying personnel.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related All technical fields are equally included in the scope of patent protection of the present invention.

Claims (10)

1. a noncontact physiology signal acquisition device, it is characterised in that including: flexible body, tension force pass Sensor and signal processing unit；

Described flexible body includes that flexible body panel and hollow capsules, described hollow capsules are arranged at flexible body Among panel；The human pressure that described flexible body panel bears is converted into hollow capsule body wall by hollow capsules Tension force；Wherein, described hollow capsules is inserted gas or liquid, the people born by flexible body panel Body pressure is converted to the tension force of hollow capsule body wall；

Described tension pick-up is also disposed in flexible body panel, produces electricity according to the tension force of described bladder walls Signal；

The described signal of telecommunication is carried out processing the physiological signal obtaining human body by described signal processing unit.

Noncontact physiology signal acquisition device the most according to claim 1, it is characterised in that described Hollow capsules is made up of tip portion or the flat cavity structure of spheroid.

3., according to the noncontact physiology signal acquisition device according to any one of claim 1 or 2, it is special Levying and be, described tension pick-up is provided with piezoelectric membrane；Described piezoelectric membrane is arranged at hollow capsules On inwall or outer wall.

4. a noncontact physiological signal collection mat, it is characterised in that at least one is set in mat Noncontact physiology signal acquisition device and wireless transparent transmission circuit；

Described noncontact physiology signal acquisition device includes: flexible body, tension pick-up and signal transacting Unit；Described flexible body includes that flexible body panel and hollow capsules, described hollow capsules are arranged at flexibility Among dignity plate；The human pressure that described flexible body panel bears is converted into hollow capsules by hollow capsules The tension force of wall；Wherein, described hollow capsules is inserted gas or liquid, flexible body panel has been born Human pressure is converted to the tension force of hollow capsule body wall；Described tension pick-up is also disposed in flexible body panel, Tension force according to described bladder walls produces the signal of telecommunication；Described signal processing unit to the described signal of telecommunication at Reason obtains the physiological signal of human body；

Described wireless transparent transmission circuit, is exported the physiological signal of described human body by wireless transparent transmission.

Noncontact physiological signal collection mat the most according to claim 4, it is characterised in that described Hollow capsules is made up of tip portion or the flat cavity structure of spheroid.

6., according to the noncontact physiological signal collection mat according to any one of claim 4 or 5, it is special Levying and be, described tension pick-up is provided with piezoelectric membrane；Described piezoelectric membrane is arranged at hollow capsules On inwall or outer wall.

7. a periodicity force signals harvester, it is characterised in that including: flexible body, tension force Sensor and signal processing unit；

Described flexible body includes flexible body panel and a hollow capsules, and one hollow capsules is arranged Among flexible body panel；The periodicity active force that described flexible body panel bears is converted by hollow capsules Tension force for hollow capsule body wall；Wherein, described hollow capsules has been inserted gas or liquid, by flexible body The human pressure that panel bears is converted to the tension force of hollow capsule body wall, and described human pressure comprises human body respiration And/or the periodicity active force that heartbeat action produces；

Described tension pick-up is also disposed in flexible body panel, produces electricity according to the tension force of described bladder walls Signal；

The described signal of telecommunication is carried out processing acquisition periodically amount of force by described signal processing unit.

Periodicity force signals harvester the most according to claim 7, it is characterised in that institute State device also to include:

Judging unit, according to the periodicity amount of force scope set, it is judged that acquired periodicity is made Firmly size whether in the range of；When beyond the scope set, produce alarm signal.

Periodicity force signals harvester the most according to claim 7, it is characterised in that institute State hollow capsules to be made up of tip portion or the flat cavity structure of spheroid.

10. according to the periodicity force signals harvester according to any one of claim 7 to 9, It is characterized in that, described tension pick-up is provided with piezoelectric membrane；Described piezoelectric membrane is arranged at hollow capsule On the inwall of body or outer wall.