Novel physiological parameter monitoring mattress

Abstract

The utility model relates to a novel physiological parameter monitoring mattress which comprises a mattress body, a plurality of piezoelectric film sensors distributed on the mattress and a signal processing device, the output end of the piezoelectric film sensor is connected with the input end of the signal processing device, and the signal processing device comprises a signal conditioning circuit, a channel scanning circuit and an information acquisition circuit; the input end of the conditioning circuit sequentially passes through a coupling capacitor C and a driving operational amplifier D and then is connected with the channel scanning circuit through the heart rate conditioning circuit, the breathing conditioning circuit and the body movement conditioning circuit, and after time sequence scanning selection, signals are sent to the information acquisition circuit for storage and uploading of acquired signals. According to the mattress, a sensor does not need to be installed or connected on the body surface of a subject or a monitoring terminal device does not need to be worn on the body surface of the subject, continuous physiological loads of the subject in the monitoring process are avoided, then the accuracy of physiological parameter measurement is improved, and the mattress is particularly suitable for monitoring application of people without autonomous behavior ability.

Description

Technical Field

[0001] The utility model relates to the field of medical testing equipment and testing technology, and in particular to a novel physiological parameter monitoring mattress. Background Art

[0002] Health monitoring equipment needs to collect data on human heartbeat, breathing, body movement and other parameters to obtain effective physiological information of the human body for testing. Currently, conventional testing equipment on the market generally requires the installation of various types of sensors and signal cables on the human body surface or the wearing of wearable integrated devices, which increases the physiological load of the subjects and causes deviations in physiological parameter measurement or inaccurate data. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a new type of physiological parameter monitoring mattress, which is easy to use and has complete functions. It does not require the installation of connecting sensors on the subject's body surface or the wearing of monitoring terminal equipment, thus avoiding the subject from generating continuous physiological load during the monitoring process, thereby improving the accuracy of physiological parameter measurement.

[0004] The novel physiological parameter monitoring mattress comprises a mattress body, a plurality of piezoelectric film sensors arranged on the mattress body, and a signal processing device; the output end of the piezoelectric film sensor is connected to the input end of the signal processing device, and the signal processing device comprises a plurality of signal conditioning circuits connected to the signal output ends of the piezoelectric film sensors in a one-to-one correspondence, and a channel scanning circuit and an information acquisition circuit connected in sequence to the downstream of the signal conditioning circuit; wherein the input end of the conditioning circuit is divided into three paths after passing through a coupling capacitor C and a driving operational amplifier D in sequence, the first path outputs a heart rate signal with a spectrum of 2-20Hz through a heart rate conditioning circuit with a gain of 20 times, the second path outputs a breathing signal with a spectrum of 0.1-2Hz through a breathing conditioning circuit with a gain of 4 times, and the third path outputs a breathing signal with a spectrum of 1-2Hz through a breathing conditioning circuit with a gain of 1. The body motion conditioning circuit with gain outputs a body motion signal with a spectrum higher than 20Hz; the channel scanning circuit includes a heart rate channel analog switch module IC1 for connecting to the output end of the heart rate conditioning circuit of each conditioning circuit, a respiratory channel analog switch module IC2 for connecting to the output end of the respiratory conditioning circuit of each conditioning circuit, a body motion channel analog switch module IC3 for connecting to the output end of the body motion conditioning circuit of each conditioning circuit, and a channel management module IC4 connected to the control end of each channel analog switch module, and a crystal oscillator circuit is connected to the channel management module IC4; the piezoelectric film sensor sensing signal is sent to the information acquisition circuit for storage and uploading of the acquired signal after signal enhancement processing and timing scanning selection by the conditioning circuit and the channel scanning circuit.

[0005] Furthermore, the information acquisition circuit includes a wireless module for acquiring heart rate, respiration, and body movement signal data output by the channel scanning circuit, as well as a memory connected to the wireless module for storing data and a data transmitting antenna for uploading data.

[0006] Furthermore, the ADC input end of the wireless module is respectively connected to the channel signal output ends of the heart rate channel analog switch module IC1, the breathing channel analog switch module IC2, the body movement channel analog switch module IC3, and the clock signal output end of the channel management module IC4.

[0007] Furthermore, the piezoelectric film sensors are arranged in a plurality of rows in the horizontal and vertical directions on the mattress body to form a sensor matrix; wherein the gap between adjacent rows of piezoelectric film sensors in the horizontal direction is 15 cm, and the gap between adjacent columns of piezoelectric film sensors in the vertical direction is 10 cm.

[0008] The utility model discloses a novel physiological parameter monitoring mattress, which is easy to use and has complete functions. It does not need to install connecting sensors on the subject's body surface or wear monitoring terminal equipment, thus avoiding the subject from generating continuous physiological load during the monitoring process, thereby improving the accuracy of physiological parameter measurement. It is particularly suitable for monitoring applications for people without autonomous behavior ability (such as infants, disabled elderly people, disabled people, etc.). BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The following is a further description of a new type of physiological parameter monitoring mattress of the utility model in conjunction with the accompanying drawings:

[0010] Figure 1 It is a wireframe diagram of the logical structure and connection principle of the piezoelectric film sensor and the signal processing device of the novel physiological parameter monitoring mattress;

[0011] Figure 2 It is a circuit diagram of the signal conditioning circuit of the novel physiological parameter monitoring mattress;

[0012] Figure 3 It is a circuit diagram of the channel scanning circuit of the novel physiological parameter monitoring mattress;

[0013] Figure 4 It is a circuit diagram of the information acquisition circuit of the novel physiological parameter monitoring mattress;

[0014] Figure 5 1 is a schematic diagram of the planar structure of a mattress body and a piezoelectric film sensor of a novel physiological parameter monitoring mattress.

[0015] In the figure:

[0016] 1- mattress body, 2- piezoelectric film sensor, 3- signal processing device;

[0017] 31- signal conditioning circuit, 32- channel scanning circuit, 33- information acquisition circuit;

[0018] 311 - heart rate conditioning circuit, 312 - breathing conditioning circuit, 313 - body movement conditioning circuit; 321 - heart rate channel analog switch module IC1, 322 - breathing channel analog switch module IC2, 323 - body movement channel analog switch module IC3, 324 - channel management module IC4; 331 - wireless module, 332 - memory, 333 - data transmission antenna. DETAILED DESCRIPTION

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0021] The technical solution of the utility model is further described below with specific embodiments, but the protection scope of the utility model is not limited to the following embodiments.

[0022] Implementation method 1: Figures 1 to 3As shown, the novel physiological parameter monitoring mattress comprises a mattress body 1, a plurality of piezoelectric film sensors 2 arranged on the mattress body 1, and a signal processing device 3; the output end of the piezoelectric film sensor 2 is connected to the input end of the signal processing device 3, and the signal processing device 3 comprises a plurality of signal conditioning circuits 31 connected to the signal output ends of the piezoelectric film sensors 2 in a one-to-one correspondence, and a channel scanning circuit 32 and an information acquisition circuit 33 sequentially connected to the downstream of the signal conditioning circuit 31; wherein the input end of the conditioning circuit 31 is sequentially divided into three paths after passing through a coupling capacitor C and a driving operational amplifier D, the first path is a heart rate conditioning circuit 311 with a gain of 20 times, outputting a heart rate signal with a spectrum of 2-20Hz, the second path is a breathing conditioning circuit 312 with a gain of 4 times, outputting a breathing signal with a spectrum of 0.1-2Hz, and the third path is a breathing conditioning circuit 312 with a gain of 1 times, outputting a breathing signal with a spectrum of 0.1-2Hz. The body motion conditioning circuit 313 with a gain outputs a body motion signal with a spectrum higher than 20Hz; the channel scanning circuit 32 includes a heart rate channel analog switch module IC1 for connecting to the output end of the heart rate conditioning circuit 311 of each conditioning circuit 31, a respiratory channel analog switch module IC2 for connecting to the output end of the respiratory conditioning circuit 312 of each conditioning circuit 31, a body motion channel analog switch module IC3 for connecting to the output end of the body motion conditioning circuit 313 of each conditioning circuit 31, and a channel management module IC4 connected to the control end of each channel analog switch module, and a crystal oscillator circuit is connected to the channel management module IC4; the sensing signal of the piezoelectric film sensor 2 is sent to the information acquisition circuit 33 for storage and uploading of the collected signal after signal enhancement processing and timing scanning selection by the conditioning circuit 31 and the channel scanning circuit 32. Through signal enhancement processing, the conditioning circuit outputs a pure sensing signal; through timing scanning selection, the signal processing device can use a wireless module with fewer ADC resources to collect physiological parameters, and does not need to consume system time resources of the information acquisition circuit part. The signal conditioning circuits of each piezoelectric film sensor are consistent. In this embodiment, the piezoelectric film sensor outputs a voltage signal, which is sequentially branched after capacitor coupling and operational amplifier driving. Since the bandwidths of the conditioning circuits corresponding to the heart rate signal, breathing signal, and body movement signal are set to 2Hz to 20Hz, 0.1Hz to 2Hz, and above 20Hz, respectively, the conditioning circuits on each branch utilize the output physiological signal characteristics of the piezoelectric film sensor to split the mixed signal input by the sensor into pure heart rate signals, breathing signals, and body movement signals; the signal output by the signal conditioning circuit is connected to the channel scanning circuit, and the time signal output by the crystal oscillator is passed through the channel management chip to generate an address coding signal in an incremental manner to open the corresponding analog switch channel, thereby completing the scanning selection under clock control.

[0023] Implementation method 2: Figure 4As shown, the information acquisition circuit 33 of the novel physiological parameter monitoring mattress includes a wireless module 331 for acquiring the heart rate, respiration, and body movement signal data output by the channel scanning circuit 32, and a memory 332 for storing data and a data transmitting antenna 333 for uploading data connected to the wireless module 331. The ADC input end of the wireless module 331 is respectively connected to the channel signal output ends of the heart rate channel analog switch module IC1, the respiration channel analog switch module IC2, the body movement channel analog switch module IC3, and the clock signal output end of the channel management module IC4. The signal output by the channel scanning circuit is connected to the information acquisition circuit, and the universal input port of the wireless module records the address information output by the array scanning circuit, and the external interrupt port of the wireless module records the clock signal output by the scanning circuit, so as to realize accurate signal acquisition driven by the clock signal output by the array circuit. The wireless simulation records the collected heart rate signal, breathing signal, body movement signal and address information in the memory, or sends them to the server through wireless communication for statistical analysis by the host computer. The host computer can identify them through simple peak features, and can calculate the heart rate, breathing rate and body movement frequency by combining the sampling clock frequency and the interval between the peak points. The remaining structures and components are as described in Implementation 1 and will not be described again.

[0024] Implementation method 3: Figure 5 As shown, the piezoelectric film sensors 2 of the novel physiological parameter monitoring mattress are arranged in a plurality of rows and strips on the mattress body 1 in the horizontal and vertical directions to form a sensor matrix; wherein, the gap between adjacent rows of piezoelectric film sensors 2 in the horizontal direction is 15 cm, and the gap between adjacent columns of piezoelectric film sensors 2 in the vertical direction is 10 cm. The number of piezoelectric film sensors 2 arranged in the horizontal and vertical directions is determined by the size of the mattress body, and the gap between sensors can also be appropriately adjusted according to the requirements of acquisition sensitivity and manufacturing cost. The remaining structures and components are as described in Implementation 1 and will not be described again.

[0025] During operation: the sensor array composed of piezoelectric film sensors on the mattress body picks up the subject's physiological parameter information. The signal conditioning circuit amplifies the sensor signal, distinguishes the heart rate, breathing, and body movement signals, and outputs them to the channel scanning circuit. The channel management module on the channel scanning circuit encodes the channels and transmits the signal outputs of each channel on the analog switch module of each channel to the ADC interface in turn. The information acquisition circuit completes the physiological information acquisition and saves the collected information in the memory, or uploads it to the data server of the parameter analysis device (host computer) through wireless signals.

[0026] This new physiological parameter monitoring mattress is easy to use and has complete functions. It does not require the installation of connected sensors on the subject's body surface or the wearing of monitoring terminal equipment, which avoids the subject from generating continuous physiological load during the monitoring process, thereby improving the accuracy of physiological parameter measurement. It is especially suitable for monitoring applications for people without autonomous behavior ability (such as infants, disabled elderly people, disabled people, etc.).

[0027] The above description shows the main features, basic principles, and advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments or embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, the above embodiments or embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A new type of physiological parameter monitoring mattress, Its characteristics are: The mattress comprises a mattress body (1), a plurality of piezoelectric film sensors (2) arranged on the mattress body (1), and a signal processing device (3); the output end of the piezoelectric film sensor (2) is connected to the input end of the signal processing device (3); the signal processing device (3) comprises a plurality of signal conditioning circuits (31) connected one-to-one with the signal output ends of the piezoelectric film sensors (2), and a channel scanning circuit (32) and an information acquisition circuit (33) connected in sequence downstream of the signal conditioning circuit (31); wherein: The input end of the conditioning circuit (31) is divided into three paths after passing through a coupling capacitor C and a driving operational amplifier D in sequence. The first path outputs a heart rate signal with a spectrum of 2-20 Hz through a heart rate conditioning circuit (311) with a gain of 20 times, the second path outputs a breathing signal with a spectrum of 0.1-2 Hz through a breathing conditioning circuit (312) with a gain of 4 times, and the third path outputs a body movement signal with a spectrum higher than 20 Hz through a body movement conditioning circuit (313) with a gain of 1 times. The channel scanning circuit (32) comprises a heart rate channel analog switch module IC1 for connecting to the output end of the heart rate conditioning circuit (311) of each conditioning circuit (31), and a heart rate channel analog switch module IC2 for connecting to each conditioning circuit (31) A respiratory channel analog switch module IC2 connected to the output end of the respiratory conditioning circuit (312) of the conditioning circuit (31), a body movement channel analog switch module IC3 connected to the output end of the body movement conditioning circuit (313) of each conditioning circuit (31), and a channel management module IC4 connected to the control end of each channel analog switch module, wherein a crystal oscillator circuit is connected to the channel management module IC4; the sensing signal of the piezoelectric film sensor (2) is sent to the information acquisition circuit (33) for storage and uploading of the collected signal after signal enhancement processing and timing scanning selection by the conditioning circuit (31) and the channel scanning circuit (32).

2. The novel physiological parameter monitoring mattress according to claim 1, Its characteristics are: The information acquisition circuit (33) comprises a wireless module (331) for acquiring heart rate, respiration and body movement signal data output by the channel scanning circuit (32), a memory (332) connected to the wireless module (331) for storing data, and a data transmitting antenna (333) for uploading data.

3. The novel physiological parameter monitoring mattress according to claim 2, Its characteristics are: The ADC input end of the wireless module (331) is respectively connected to the channel signal output ends of the heart rate channel analog switch module IC1, the breathing channel analog switch module IC2, the body movement channel analog switch module IC3, and the clock signal output end of the channel management module IC4.

4. The novel physiological parameter monitoring mattress according to any one of claims 1 to 3, Its characteristics are: The piezoelectric film sensors (2) are arranged in a plurality of rows and strips on the mattress body (1) in the horizontal and vertical directions to form a sensor matrix; wherein the gap between rows of adjacent piezoelectric film sensors (2) in the horizontal direction is 15 cm, and the gap between columns of adjacent piezoelectric film sensors (2) in the vertical direction is 10 cm.

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