CN118236045A - A multi-channel pulse acquisition system and method - Google Patents

Abstract

The present application discloses a multi-channel pulse acquisition system and method, including a source signal acquisition device, a control device and a data transfer device. The source signal acquisition device acquires a pulse pressure electrical signal through a multi-point pulse sensor, and the source signal acquisition device also sets the acquisition environment parameters for the pulse pressure electrical signal through an external pressure release module; the control device is used to perform signal pre-adjustment processing on the pulse pressure electrical signal; the data transfer device is used to perform analog-to-digital conversion on the acquired pulse pressure electrical signal, and store the pulse pressure digital signal acquired after the analog-to-digital conversion in the form of pulse pressure data, wherein the pulse pressure data includes sensor ID information and pressure condition information. Since the pulse pressure electrical signal can be acquired from each independent piezoelectric sensor when acquiring the pulse pressure electrical signal, and each piezoelectric sensor can also be independently pressurized, the pulse pressure data can better fit and restore all the pulse image data, thereby improving the accuracy and reliability of pulse image post-processing.

Description

A multi-channel pulse acquisition system and method

Technical Field

The present application relates to the technical field of electronic pulse diagnosis, and in particular to a multi-channel pulse acquisition system and method.

Background technique

Pulse signals can not only measure basic physiological information such as heart rate, respiratory rate, blood oxygen, and blood pressure, but can also be used for health monitoring and disease diagnosis. For example, Chinese medicine pulse diagnosis is to obtain pulse conditions based on pulse pressure signals, and use pulse conditions to distinguish the causes of diseases, infer changes in diseases, identify the true or false of diseases, and judge the prognosis of diseases.

The core device of the electronic pulse diagnosis instrument is the pulse acquisition system. When collecting pulse diagnosis information, the pulse taking location, process and amount of information will affect the clinical treatment method and treatment results. Pulse diagnosis is composed of the location (deep, shallow), rate (fast, slow), strength (strong, weak), rhythm (regular or not, with or without pauses) and morphology of the arterial pulsation. The current pulse acquisition system cannot completely simulate the pulse diagnosis process. For example, when the pulse sensor detects the pulse pressure signal under a certain external pressure (simulating floating, sinking), the pulse pressure signal obtained is single (only one position of Cun, Guan and Chi can be obtained), while the actual pulse diagnosis process requires the acquisition of pulse pressure signals under different external pressures (floating, sinking) and different locations (Cun, Guan and Chi).

Summary of the invention

The main technical problem solved by this application is how to obtain all pulse feeling data based on a multi-point pulse sensor.

According to the first aspect, an embodiment provides a multi-channel pulse acquisition system, including a source signal acquisition device, a control device and a data transfer device;

The source signal acquisition device includes a multi-point pulse sensor, which is connected to the control device. The multi-point pulse sensor includes at least two independent piezoelectric sensors, which are used to simultaneously monitor the pulse pressure waves of at least two different skin areas, and convert the monitored pulse pressure waves into pulse pressure electrical signals and then output them to the control device;

The control device includes a conditioning circuit, which is connected to the multi-point pulse sensor and the data transfer device respectively, and is used to asynchronously acquire the pulse pressure electrical signal acquired by each piezoelectric sensor converting the pulse pressure wave, and perform signal pre-conditioning processing on the acquired pulse pressure electrical signal, and output the pulse pressure electrical signal after signal pre-conditioning processing to the data transfer device; the signal pre-conditioning processing includes filtering processing, amplification processing and/or noise reduction processing;

The data transfer device is used to perform analog-to-digital conversion on the acquired pulse pressure electrical signal, and store the pulse pressure digital signal acquired after the analog-to-digital conversion in the form of pulse pressure data;

The source signal acquisition device further includes an external pressure release module, each of which includes pressure applying units having the same number as the piezoelectric sensors, and each of which is used to apply external pressure to one of the piezoelectric sensors to change the pressure between the piezoelectric sensor and the monitored skin area;

The control device further comprises a pressure control setting module, which is used to separately set the pressure condition parameters of each pressure unit and send the pressure condition parameters to the data transfer device; the pressure condition parameters include a pressure value and/or a pressure duration;

The pulse pressure data stored in the data transfer device includes sensor ID information and pressure condition information; the sensor ID information is used to distinguish each piezoelectric sensor, and the pressure condition information is used to identify the pressure condition parameters for obtaining the pulse pressure electrical signal.

In one embodiment, the multi-point pulse sensor further includes:

A housing having a receiving slot;

A conductive structure is disposed in the receiving groove, the conductive structure is used to transmit the pulse signal, and one side of the conductive structure is used to contact with human skin;

and a sensor assembly, which is attached to the side of the conductive structure away from the human body, the sensor assembly includes three piezoelectric sensors, namely a first piezoelectric sensor, a second piezoelectric sensor and a third piezoelectric sensor; the three piezoelectric sensors are used to output a pulse pressure signal respectively, namely a first signal, a second signal and a third signal; the first piezoelectric sensor, the second piezoelectric sensor and the third piezoelectric sensor are independent of each other and are arranged in sequence and side by side on the same side of the conductive structure, the first piezoelectric sensor is used to output a first signal, the second piezoelectric sensor is used to output a second signal, and the third piezoelectric sensor is used to output a third signal; the three piezoelectric sensors respectively monitor the pulse pressure waves of three different skin areas, and the three different skin areas include Cun, Guan and Chi; when the multi-point pulse sensor is used to diagnose the human body, the conductive structure contacts the human skin; the first piezoelectric sensor is arranged corresponding to the Cun part to convert the pulse pressure wave of the Cun part into a first signal; the second piezoelectric sensor is arranged corresponding to the Guan part, and converts the pulse pressure wave of the Guan part into a second signal; the third piezoelectric sensor is arranged correspondingly to convert the pulse pressure wave of the Chi part into a third signal.

In one embodiment, the external pressure release module includes three pressure applying units, namely a first pressure applying unit, a second pressure applying unit and a third pressure applying unit; the first pressure applying unit applies pressure to the first piezoelectric sensor, the second pressure applying unit applies pressure to the second piezoelectric sensor, and the third pressure applying unit applies pressure to the third piezoelectric sensor;

Each of the pressure-applying units includes a pressure airbag, the pressure range of which is adapted to the size of the skin area monitored by the piezoelectric sensor that applies pressure to it, so as to achieve individual pressure on the piezoelectric sensor by inflation.

In one embodiment, the pressure control setting module includes an air pump, which is connected to each of the pressure airbags through an inflation channel to independently inflate and deflate each of the pressure airbags to independently adjust the pressure between each piezoelectric sensor and the monitored skin area.

In one embodiment, the conditioning circuit includes the same number of differential amplifier circuits, switching circuits, power frequency filter circuits and secondary amplifier circuits as the number of the piezoelectric sensors;

Each of the differential amplifier circuits is connected to one of the piezoelectric sensors, and the differential amplifier circuit is used to differentially amplify the pulse piezoelectric signal output by one of the piezoelectric sensors;

The switching circuit is connected to the power frequency filter circuit and each of the differential amplifier circuits respectively, and the switching circuit is used to connect the power frequency filter circuit and one of the differential amplifier circuits in a time-sharing manner;

The power frequency filtering circuit is connected to the secondary amplifying circuit and is used to filter the pulse pressure electrical signal after differential amplification;

The secondary amplifier circuit is connected to the data transfer device and is used for performing secondary amplification on the filtered pulse pressure electrical signal and outputting the secondary amplified pulse pressure electrical signal to the data transfer device.

In one embodiment, the data transfer device includes an AD converter and a data storage device;

The AD converter is used to perform analog-to-digital conversion on the pulse pressure electrical signal to obtain the pulse pressure digital signal;

The data storage device is used to store the pulse pressure data.

In one embodiment, the multi-channel pulse acquisition system further includes a host computer; the data transfer device is communicatively connected to the host computer, and the data transfer device is used to send the stored pulse pressure data to the host computer;

The host computer is used for displaying and/or post-processing the pulse pressure data.

In one embodiment, the multi-channel pulse acquisition system is used to acquire pulse pressure data under different acquisition environment parameters;

The acquisition environment parameters include pressure condition parameters for each of the piezoelectric sensors; the pressure condition information is used to identify the pressure condition parameters of each of the piezoelectric sensors for acquiring the pulse pressure digital signal.

According to the second aspect, an embodiment provides a multi-channel pulse acquisition method, which is applied to the multi-channel pulse acquisition system of the first aspect, and the method includes:

Monitoring pulse pressure waves in at least two different skin regions through a multi-point pulse sensor, and converting the monitored pulse pressure waves into pulse pressure electrical signals;

Performing signal pre-conditioning processing on the pulse pressure electrical signal; the signal pre-conditioning processing includes filtering processing, amplification processing and/or noise reduction processing;

Performing analog-to-digital conversion on the pulse pressure electrical signal after the signal pre-conditioning processing, and storing the pulse pressure digital signal obtained after the analog-to-digital conversion in the form of pulse pressure data; wherein the pulse pressure data includes sensor ID information and pressure condition information, the sensor ID information is used to distinguish each piezoelectric sensor, and the pressure condition information is used to identify the pressure condition parameters for obtaining the pulse pressure electrical signal;

Acquire pulse pressure data under different acquisition environment parameters; the acquisition environment parameters include pressure condition parameters for each of the piezoelectric sensors; the pressure condition information is used to identify the pressure condition parameters of each of the piezoelectric sensors that acquire the pulse pressure digital signal.

According to the multi-channel pulse acquisition system of the above embodiment, when acquiring the pulse pressure electrical signal, the pulse pressure electrical signal can be collected from each independent piezoelectric sensor, and each piezoelectric sensor can be independently pressurized, so that the pulse pressure data can better fit and restore all the pulse data, thereby improving the accuracy and reliability of pulse post-processing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a block diagram of a multi-channel pulse acquisition system in an embodiment;

FIG2 is a schematic diagram of the structure of a sensor assembly in an embodiment;

FIG3 is a top view of a conductive structure in one embodiment;

FIG4 is a side view of a conductive structure in one embodiment;

FIG5 is a schematic diagram of the assembly of a housing and a conductive structure in one embodiment;

FIG6 is a schematic diagram of the structure of a conditioning circuit in an embodiment;

FIG7 is a schematic diagram of the structure of a data transfer device in an embodiment;

FIG8 is a schematic flow chart of a multi-channel pulse acquisition method in an embodiment.

Detailed ways

The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

The electronic pulse diagnosis device in the prior art cannot obtain the pulse data of all pulse conditions because it uses a synchronous pressure application method, and some pulse conditions require different pressures to be applied to different areas to collect pulse pressure signals in different areas (Cun, Guan, Chi).

In the embodiment of the present application, when acquiring pulse pressure electrical signals, the multi-channel pulse acquisition system can acquire pulse pressure electrical signals from independent piezoelectric sensors, and can also independently apply pressure to each piezoelectric sensor, so as to achieve simultaneous acquisition of pulse electrical signals by acquiring different contact pressures in different acquisition areas, further simulating the real pulse feeling technique, so that the pulse pressure data can better fit and restore all pulse feeling data, and improve the accuracy and reliability of pulse post-processing.

Embodiment 1:

Please refer to FIG1, which is a structural block diagram of a multi-channel pulse acquisition system in an embodiment. The multi-channel pulse acquisition system includes a source signal acquisition device 1, a control device 2 and a data transfer device 3. The source signal acquisition device 1 includes a multi-point pulse sensor 11, which is connected to the control device 2. The multi-point pulse sensor 11 includes at least two independent piezoelectric sensors 12, which are used to simultaneously monitor the pulse pressure waves of at least two different skin areas, and convert the monitored pulse pressure waves into pulse pressure electrical signals and output them to the control device 2. The control device 2 includes a conditioning circuit 21, which is connected to the multi-point pulse sensor 11 and the data transfer device 3 respectively. The conditioning circuit 21 is used to asynchronously acquire the pulse pressure electrical signals acquired by each piezoelectric sensor 12 converting the pulse pressure waves, and perform signal pre-conditioning processing on the acquired pulse pressure electrical signals, and output the pulse pressure electrical signals after signal pre-conditioning processing to the data transfer device 3. Among them, the signal pre-conditioning processing includes filtering processing, amplification processing and/or noise reduction processing. The data transfer device 3 is used to perform analog-to-digital conversion on the acquired pulse pressure electrical signal, and store the pulse pressure digital signal acquired after the analog-to-digital conversion in the form of pulse pressure data.

The source signal acquisition device 1 also includes an external pressure release module 13, each of which includes pressure applying units 14 of the same number as the piezoelectric sensors 12, and each of which is used to apply external pressure to a piezoelectric sensor 12 to change the pressure between the piezoelectric sensor 12 and the monitored skin area. The control device 2 also includes a pressure control setting module 22, which is used to set the pressure condition parameters of each pressure applying unit 14 separately and send the pressure condition parameters to the data transfer device 3. The pressure condition parameters include the pressure value and/or the pressure duration.

The pulse pressure data stored in the data transfer device 3 includes sensor ID information and pressure condition information. The sensor ID information is used to distinguish each piezoelectric sensor 12, and the pressure condition information is used to identify the pressure condition parameters for obtaining the pulse pressure electrical signal.

Please refer to Figures 2 to 5, wherein Figure 2 is a schematic diagram of the structure of the sensor assembly, Figure 3 is a top view of the conductive structure, Figure 4 is a side view of the conductive structure, and Figure 5 is a schematic diagram of the assembly of the housing and the conductive structure. The multi-point pulse sensor disclosed in the embodiment of the present application includes a housing, a conductive structure, and a sensor assembly. The housing has a receiving groove 111, and the conductive structure is arranged in the receiving groove 111. The conductive structure is used to transmit pulse pressure waves, and one side of the conductive structure is used to contact the human skin. The sensor assembly is attached to the side of the conductive structure away from the human body. More specifically, the sensor assembly and the conductive structure are bonded by epoxy resin. The sensor assembly includes a first piezoelectric sensor 131, a second piezoelectric sensor 132, and a third piezoelectric sensor 133. The first piezoelectric sensor 131, the second piezoelectric sensor 132, and the third piezoelectric sensor 133 are independent of each other and are arranged side by side in sequence on the same side of the conductive structure. The first piezoelectric sensor 131 is used to output a first signal, the second piezoelectric sensor 132 is used to output a second signal, and the third piezoelectric sensor 133 is used to output a third signal. When the multi-point pulse sensor is used to diagnose the human body's pulse, the conductive structure contacts the human skin. The first piezoelectric sensor 131 is set corresponding to the Cun position to convert the pulse pressure wave at the Cun position into a first signal. The second piezoelectric sensor 132 is set corresponding to the Guan position and converts the pulse pressure wave at the Guan position into a second signal. The third piezoelectric sensor 133 is set corresponding to the Chi position to convert the pulse pressure wave at the Chi position into a third signal.

In one embodiment of the present application, the first piezoelectric sensor 131, the second piezoelectric sensor 132 and the third piezoelectric sensor 133 are independently arranged side by side on the same side of the conductive structure, the first piezoelectric sensor 131 is arranged corresponding to the Cun part to convert the pulse pressure wave of the Cun part into a first signal, the second piezoelectric sensor 132 is arranged corresponding to the Guan part to convert the pulse pressure wave of the Guan part into a second signal, and the third piezoelectric sensor 133 is arranged corresponding to the Chi part to convert the pulse pressure wave of the Chi part into a third signal. The multi-point pulse sensor of the present invention has a simple structure and can take into account the measurement of the Cun, Guan and Chi parts. In addition, the multi-point pulse sensor includes three independent sensors, which is lower in cost and more convenient to use than the traditional array sensor. The setting of the shell structure can protect the sensor assembly and improve the robustness and service life of the multi-point pulse sensor. In one embodiment, epoxy resin is used to bond the sensor assembly and the conductive structure, which does not affect signal transmission and is convenient. As shown in FIG3 and FIG4, the conductive structure includes a first conductive structure 121, a second conductive structure 122 and a third conductive structure 123, and the first conductive structure 121, the second conductive structure 122 and the third conductive structure 123 are arranged in sequence side by side. The first conductive structure 121 is arranged corresponding to the first piezoelectric sensor 131, the second conductive structure 122 is arranged corresponding to the second piezoelectric sensor 132, and the third conductive structure 123 is arranged corresponding to the third piezoelectric sensor 133. Through the side-by-side arrangement of the first conductive structure 121, the second conductive structure 122 and the third conductive structure 123, the overall structure matches the three-part design of Cun Guan Chi, and the conductive structure can realize the conversion of the vertical pulse pulsation into the horizontal direction conduction, which is conducive to the extension of the piezoelectric sensor, so that the piezoelectric sensor can exert the piezoelectric effect to the maximum extent, generate a larger deformation, and then generate a larger electrical signal, effectively improving the signal-to-noise ratio of the signal.

As shown in Fig. 3 and Fig. 4, the first conductive structure 121 and the second conductive structure 122, as well as the second conductive structure 122 and the third conductive structure 123 are connected via a film 124. The first piezoelectric sensor 131, the second piezoelectric sensor 132 and the third piezoelectric sensor 133 are independently arranged, and the first conductive structure 121 and the second conductive structure 122, as well as the second conductive structure 122 and the third conductive structure 123 are connected via a film 124, which can reduce the mutual influence between the three conductive structures, realize the integrated independent measurement of the three parts of the inch, the gate and the ruler, and also facilitate the production and subsequent assembly of the conductive structure.

As shown in Figures 3 and 4, the material of the conductive structure and the film 124 are both silicone, the distance between the first conductive structure 121 and the second conductive structure 122 is 2.9mm; the distance between the second conductive structure 122 and the third conductive structure 123 is 3.3mm, and the thickness of the film 124 is 0.2mm. The spacing between the first conductive structure 121, the second conductive structure 122 and the third conductive structure 123 can reduce the interference of pulse pressure waves between each other while taking into account the coverage of the three parts of the inch, the guan and the chi, so as to improve the signal quality output by the sensor component. In one embodiment, the side of the first conductive structure 121, the second conductive structure 122 and the third conductive structure 123 in contact with the human skin is also provided with a plurality of protruding structures 125, and the protruding structures 125 are used to contact the human body. The design of the protruding structure 125 can achieve precise positioning during pulse measurement, more accurately and effectively perform pulse measurement, and greatly reduce the measurement error caused by electromyographic interference and displacement during the test process, and can also reduce human interference during the test (such as surface electrical signals, human body temperature and humidity, etc.), and improve the signal-to-noise ratio. In other embodiments, the multi-point pulse sensor further includes a spacer (not shown), which is disposed on the surface of the protruding structure 125 to space the protruding structure 125 from human skin.

Since the raised structure 125 is in direct contact with the human body, a multi-point pulse sensor can often be used multiple times to measure multiple people, which makes the multi-point pulse sensor unhygienic. The spacer can be replaced and used. When measuring different human bodies, different spacers are used to separate the human skin and the raised structure 125, which can ensure that the multi-point sensor is clean and hygienic. In other embodiments, an inflatable cushion (not shown) is provided at the bottom of the accommodating groove 111 at positions corresponding to the first conductive structure 121, the second conductive structure 122, and the third conductive structure 123. The inflatable cushion can be used to apply pressure to the first conductive structure 121, the second conductive structure 122, and the third conductive structure 123 to conduct the pulse signal. When taking a pulse on a human body, it is usually necessary to press the human pulse to different degrees. The use of an inflatable cushion can facilitate the pressure on the conductive structure without manual pressure.

As shown in FIG5 , an opening 1111 is further provided on the side wall of the receiving groove 111, and the sensor assembly further includes four pins 134, which are all provided on the side of the third piezoelectric sensor 133 away from the second piezoelectric sensor 132, so as to lead the four pins 134 out of the opening 1111 to be electrically connected to the data acquisition device. Three of the pins 134 are electrically connected to the anodes of the first piezoelectric sensor 131, the second piezoelectric sensor 132, and the third piezoelectric sensor 133 in a one-to-one correspondence, and another pin 134 is electrically connected to the cathodes of the first piezoelectric sensor 131, the second piezoelectric sensor 132, and the third piezoelectric sensor 133.

The setting of the opening 1111 facilitates the lead-out of the four pins 134. More specifically, in an embodiment of the present invention, the four pins 134 are led out using a flexible printed circuit (FPC), and the FPC is then electrically connected to the data acquisition device to transmit the first signal, the second signal and the third signal to the data acquisition device.

As shown in FIG2 , the connecting direction of the first piezoelectric sensor 131 and the third piezoelectric sensor 133 is the length direction, and the direction perpendicular to the length direction on the plane where the sensor assembly is located is the width direction. The length of the sensor assembly in the length direction is 79.2 mm, and the length in the width direction is 21 mm; the length of the first piezoelectric sensor 131 in the length direction is 12.3 mm, and the length in the width direction is 16 mm; the length of the second piezoelectric sensor 132 in the length direction is 6 mm, and the length in the width direction is 16 mm; the length of the third piezoelectric sensor 133 in the length direction is 17.7 mm, and the length in the width direction is 16 mm. In one embodiment, the size design of the first piezoelectric sensor 131, the second piezoelectric sensor 132, and the third piezoelectric sensor 133 refers to the characteristics of the human wrist, wherein the length of the FPC can be adjusted according to demand, and the length of the FPC in the present invention is 20 mm. In one embodiment, the first piezoelectric sensor 131, the second piezoelectric sensor 132, and the third piezoelectric sensor 133 are all piezoelectric film sensors. The distance between the first piezoelectric sensor 131 and the second piezoelectric sensor 132 is 2 mm, and the distance between the second piezoelectric sensor 132 and the third piezoelectric sensor 133 is 3 mm. In the above embodiment, the distances between the first piezoelectric sensor 131, the second piezoelectric sensor 132 and the third piezoelectric sensor 133 are set to the above values, which can avoid the pulse pressure waves in the three areas of Cun, Guan and Chi from interfering with each other.

In one embodiment, the external pressure release module 1 includes three pressure applying units 14, namely, a first pressure applying unit, a second pressure applying unit and a third pressure applying unit. The first pressure applying unit applies pressure to the first piezoelectric sensor, the second pressure applying unit applies pressure to the second piezoelectric sensor, and the third pressure applying unit applies pressure to the third piezoelectric sensor. Each pressure applying unit 14 includes a pressure airbag, and the pressure application range of the pressure airbag is adapted to the size of the skin area range monitored by the piezoelectric sensor 12 that applies pressure to it, so as to achieve independent pressure application to the piezoelectric sensor 12 by inflation. In one embodiment, the pressure control setting module 22 includes an inflation pump, which is connected to each pressure airbag through an inflation channel, so as to independently inflate and deflate each pressure airbag, so as to independently adjust the pressure between each piezoelectric sensor 12 and the monitored skin area.

Please refer to FIG6, which is a schematic diagram of the structure of a conditioning circuit in an embodiment. In one embodiment, the conditioning circuit 21 includes the same number of differential amplifier circuits 23, switching circuits 24, power frequency filter circuits 25 and secondary amplifier circuits 26 as the number of piezoelectric sensors 12. Each differential amplifier circuit 21 is connected to a piezoelectric sensor 12, and the differential amplifier circuit 23 is used to differentially amplify the pulse pressure electrical signal output by a piezoelectric sensor 12. The switching circuit 24 is respectively connected to the power frequency filter circuit 25 and each differential amplifier circuit 23, and the switching circuit 24 is used to time-share the power frequency filter circuit 25 and a differential amplifier circuit 23. The power frequency filter circuit 25 is connected to the secondary amplifier circuit 26 for filtering the pulse pressure electrical signal after differential amplification. The secondary amplifier circuit 26 is connected to the data transfer device 3 for secondary amplification of the filtered pulse pressure electrical signal and outputting the secondary amplified pulse pressure electrical signal to the data transfer device 3.

Please refer to FIG. 7, which is a schematic diagram of the structure of a data transfer device in an embodiment. In one embodiment, the data transfer device 3 includes an AD converter 31, a data storage device 32 and a serial communication interface 33. The AD converter 31 is used to perform analog-to-digital conversion on the pulse pressure electrical signal to obtain a pulse pressure digital signal. The data storage device 32 is used to store pulse pressure data. The serial communication interface 33 is used to establish a communication connection with a host computer to transmit pulse pressure data. The host computer 4 is connected to the data transfer device 3 in communication, and the data transfer device 3 is used to send the stored pulse pressure data to the host computer 4, and the host computer 4 is used to display and/or post-process the pulse pressure data.

In one embodiment, a multi-channel pulse acquisition system is used to acquire pulse pressure data under different acquisition environment parameters, and the acquisition environment parameters include pressure condition parameters for each piezoelectric sensor. The pressure condition information is used to identify the pressure condition parameters of each piezoelectric sensor for acquiring the pulse pressure digital signal.

Please refer to FIG8 , which is a schematic diagram of a multi-channel pulse acquisition method in an embodiment. In one embodiment of the present application, a multi-channel pulse acquisition method is also disclosed, which is applied to the multi-channel pulse acquisition system as described above. The multi-channel pulse acquisition method includes:

Step 100, obtaining a pulse pressure electrical signal.

The pulse pressure waves in at least two different skin areas are monitored by a multi-point pulse sensor, and the monitored pulse pressure waves are converted into pulse pressure electrical signals.

Step 200: signal pre-conditioning processing.

The pulse pressure electrical signal is subjected to signal preconditioning processing, and the signal preconditioning processing includes filtering processing, amplification processing and/or noise reduction processing.

Step 300, storing pulse pressure data.

The pulse pressure electrical signal after signal pre-conditioning is converted into digital form, and the pulse pressure digital signal obtained after the analog-to-digital conversion is stored in the form of pulse pressure data, wherein the pulse pressure data includes sensor ID information and pressure condition information, the sensor ID information is used to distinguish each piezoelectric sensor, and the pressure condition information is used to identify the pressure condition parameters for obtaining the pulse pressure electrical signal.

Step 400, changing the acquisition environment parameters.

The pulse pressure data under different acquisition environment parameters are obtained, and the acquisition environment parameters include the pressure condition parameters for each piezoelectric sensor. The pressure condition information is used to identify the pressure condition parameters of each piezoelectric sensor that obtains the pulse pressure digital signal, so as to simulate different pulse conditions and realize the acquisition of full pulse condition data.

The following describes the application mode and application method of the multi-channel pulse acquisition system disclosed in the present application through specific embodiments, mainly focusing on how to conveniently acquire the three signals of Cun, Guan and Chi under different strengths of floating, middle and sinking, and fully retain the full frequency domain information of the pulse signal, that is, how to obtain all the pulse data, specifically including:

In one embodiment, the appearance and working mode of the multi-channel pulse acquisition system are similar to those of a wrist sphygmomanometer. The system is worn on the radial artery of the wrist and the switch is pressed to collect pulse. The acquisition cycle is about 40 seconds. The air pressure is gradually increased from 0 mmhg to 200 mmhg, and then gradually deflated to 20 mmhg. During this period, the signal can be sent by the data transfer device to the host computer for synchronous display and storage.

The multi-point pulse sensor disclosed in the embodiment of the present application can improve the signal-to-noise ratio and reduce the complexity of the multi-channel pulse acquisition system. The multi-point pulse sensor is composed of PVDF (piezoelectric sensor), silicone structure and shell, which conforms to the wrist ergonomic design. According to the characteristics of wrist pulse acquisition, a silicone structure with synapses is designed to facilitate pulse conduction and reduce human interference during the test (such as surface electrical signals, human body temperature and humidity, etc.); according to the characteristics of Chinese medicine pulse diagnosis, on a whole piece of PVDF, three independent sensing parts are divided according to the effective area of cun, guan and chi, realizing integrated independent measurement of three parts, and greatly reducing the complexity of the equipment. The PVDF and silicone structure are bonded with epoxy resin, and the shell is designed for protection, which improves the robustness and service life of the equipment and is easy to use.

The external pressure module uses the method of wrist sphygmomanometer to collect signals under continuously changing pressure, which meets the collection requirements of different people under floating, middle and sinking strength. The corresponding algorithm can be used to distinguish them in subsequent data processing, that is, it meets the requirements of signal measurement, is easy to operate, and can obtain rich signals under continuously changing pressure. In addition, according to the characteristics of Chinese medicine pulse diagnosis, multi-channel (inch, guan, chi) pulse signal synchronous collection is designed to facilitate subsequent data analysis and comparison. In the conditioning circuit part, each channel is amplified separately first, and then the analog switching switch circuit is used to share the post-stage filtering and amplification circuit to save costs. The data transfer device uses DMA to move data, uses SRAM (data storage device) for transfer, and frames the data to improve the robustness of data transmission, which is conducive to subsequent data decoding.

In one embodiment, the maximum sampling rate of the multi-point pulse sensor is 1KHz, which cannot obtain signal characteristics of the frequency band of 500Hz and above. In one embodiment of the present application, the sampling rate is increased to 100KHz, and the design of the conditioning circuit is combined to fully collect information from each frequency band for subsequent frequency domain analysis.

The multi-channel pulse acquisition system disclosed in the present application includes a source signal acquisition device, a control device and a data transfer device. The source signal acquisition device acquires the pulse pressure electrical signal through a multi-point pulse sensor, and the source signal acquisition device also sets the acquisition environment parameters of the pulse pressure electrical signal through the external pressure release module; the control device is used to perform signal pre-adjustment processing on the pulse pressure electrical signal; the data transfer device is used to perform analog-to-digital conversion on the acquired pulse pressure electrical signal, and store the pulse pressure digital signal acquired after the analog-to-digital conversion in the form of pulse pressure data, wherein the pulse pressure data includes sensor ID information and pressure condition information. Since the pulse pressure electrical signal can be collected from each independent piezoelectric sensor when acquiring the pulse pressure electrical signal, and each piezoelectric sensor can also be independently pressurized, the pulse pressure data can better fit and restore all the pulse image data, thereby improving the accuracy and reliability of pulse image post-processing.

Those skilled in the art will appreciate that all or part of the functions of the various methods in the above-mentioned embodiments can be implemented by hardware or by computer programs. When all or part of the functions in the above-mentioned embodiments are implemented by computer programs, the program can be stored in a computer-readable storage medium, and the storage medium can include: a read-only memory, a random access memory, a disk, an optical disk, a hard disk, etc., and the program is executed by a computer to implement the above-mentioned functions. For example, the program is stored in the memory of the device, and when the program in the memory is executed by the processor, all or part of the above-mentioned functions can be implemented. In addition, when all or part of the functions in the above-mentioned embodiments are implemented by computer programs, the program can also be stored in a storage medium such as a server, another computer, a disk, an optical disk, a flash disk or a mobile hard disk, and can be downloaded or copied and saved in the memory of the local device, or the system of the local device is updated, and when the program in the memory is executed by the processor, all or part of the functions in the above-mentioned embodiments can be implemented.

The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the idea of the present invention, some simple deductions, modifications or substitutions can be made.

Claims (10)

1. A multi-channel pulse acquisition system, characterized in that it includes a source signal acquisition device, a control device and a data transfer device; The source signal acquisition device includes a multi-point pulse sensor, which is connected to the control device. The multi-point pulse sensor includes at least two independent piezoelectric sensors, which are used to simultaneously monitor the pulse pressure waves of at least two different skin areas, and convert the monitored pulse pressure waves into pulse pressure electrical signals and then output them to the control device; The control device includes a conditioning circuit, which is connected to the multi-point pulse sensor and the data transfer device respectively, and is used to asynchronously acquire the pulse pressure electrical signal acquired by each piezoelectric sensor converting the pulse pressure wave, and perform signal pre-conditioning processing on the acquired pulse pressure electrical signal, and output the pulse pressure electrical signal after signal pre-conditioning processing to the data transfer device; the signal pre-conditioning processing includes filtering processing, amplification processing and/or noise reduction processing; The data transfer device is used to perform analog-to-digital conversion on the acquired pulse pressure electrical signal, and store the pulse pressure digital signal acquired after the analog-to-digital conversion in the form of pulse pressure data; The source signal acquisition device further includes an external pressure release module, each of which includes pressure applying units having the same number as the piezoelectric sensors, and each of which is used to apply external pressure to one of the piezoelectric sensors to change the pressure between the piezoelectric sensor and the monitored skin area; The control device further comprises a pressure control setting module, which is used to separately set the pressure condition parameters of each pressure unit and send the pressure condition parameters to the data transfer device; the pressure condition parameters include a pressure value and/or a pressure duration; The pulse pressure data stored in the data transfer device includes sensor ID information and pressure condition information; the sensor ID information is used to distinguish each piezoelectric sensor, and the pressure condition information is used to identify the pressure condition parameters for obtaining the pulse pressure electrical signal. 2. The multi-channel pulse acquisition system according to claim 1, wherein the multi-point pulse sensor further comprises: A housing having a receiving slot; A conductive structure is disposed in the receiving groove, the conductive structure is used to transmit the pulse signal, and one side of the conductive structure is used to contact with human skin; and a sensor assembly, which is attached to the side of the conductive structure away from the human body, the sensor assembly includes three piezoelectric sensors, namely a first piezoelectric sensor, a second piezoelectric sensor and a third piezoelectric sensor; the three piezoelectric sensors are used to output a pulse pressure signal respectively, namely a first signal, a second signal and a third signal; the first piezoelectric sensor, the second piezoelectric sensor and the third piezoelectric sensor are independent of each other and are arranged in sequence and side by side on the same side of the conductive structure, the first piezoelectric sensor is used to output a first signal, the second piezoelectric sensor is used to output a second signal, and the third piezoelectric sensor is used to output a third signal; the three piezoelectric sensors respectively monitor the pulse pressure waves of three different skin areas, and the three different skin areas include Cun, Guan and Chi; when the multi-point pulse sensor is used to diagnose the human body, the conductive structure contacts the human skin; the first piezoelectric sensor is arranged corresponding to the Cun part to convert the pulse pressure wave of the Cun part into a first signal; the second piezoelectric sensor is arranged corresponding to the Guan part, and converts the pulse pressure wave of the Guan part into a second signal; the third piezoelectric sensor is arranged correspondingly to convert the pulse pressure wave of the Chi part into a third signal. 3. The multi-channel pulse acquisition system according to claim 2, characterized in that the external pressure release module includes three pressure applying units, namely a first pressure applying unit, a second pressure applying unit and a third pressure applying unit; the first pressure applying unit applies pressure to the first piezoelectric sensor, the second pressure applying unit applies pressure to the second piezoelectric sensor, and the third pressure applying unit applies pressure to the third piezoelectric sensor; Each of the pressure-applying units includes a pressure airbag, the pressure range of which is adapted to the size of the skin area monitored by the piezoelectric sensor that applies pressure to it, so as to achieve individual pressure on the piezoelectric sensor by inflation. 4. The multi-channel pulse acquisition system as described in claim 3 is characterized in that the pressure control setting module includes an air pump, which is connected to each of the pressure airbags through an inflation channel to independently inflate and deflate each of the pressure airbags to independently adjust the pressure between each of the piezoelectric sensors and the monitored skin area. 5. The multi-channel pulse acquisition system according to claim 1, characterized in that the conditioning circuit comprises the same number of differential amplifier circuits, switching circuits, power frequency filter circuits and secondary amplifier circuits as the number of the piezoelectric sensors; Each of the differential amplifier circuits is connected to one of the piezoelectric sensors, and the differential amplifier circuit is used to differentially amplify the pulse piezoelectric signal output by one of the piezoelectric sensors; The switching circuit is connected to the power frequency filter circuit and each of the differential amplifier circuits respectively, and the switching circuit is used to connect the power frequency filter circuit and one of the differential amplifier circuits in a time-sharing manner; The power frequency filtering circuit is connected to the secondary amplifying circuit and is used to filter the pulse pressure electrical signal after differential amplification; The secondary amplifier circuit is connected to the data transfer device and is used for performing secondary amplification on the filtered pulse pressure electrical signal and outputting the secondary amplified pulse pressure electrical signal to the data transfer device. 6. The multi-channel pulse acquisition system according to claim 1, characterized in that the data transfer device comprises an AD converter and a data storage device; The AD converter is used to perform analog-to-digital conversion on the pulse pressure electrical signal to obtain the pulse pressure digital signal; The data storage device is used to store the pulse pressure data. 7. The multi-channel pulse acquisition system according to claim 6, characterized in that it also includes a host computer; the data transfer device is communicatively connected to the host computer, and the data transfer device is used to send the stored pulse pressure data to the host computer; The host computer is used for displaying and/or post-processing the pulse pressure data. 8. The multi-channel pulse acquisition system according to claim 1, characterized in that the multi-channel pulse acquisition system is used to acquire pulse pressure data under different acquisition environment parameters; The acquisition environment parameters include pressure condition parameters for each of the piezoelectric sensors; the pressure condition information is used to identify the pressure condition parameters of each of the piezoelectric sensors for acquiring the pulse pressure digital signal. 9. A multi-channel pulse acquisition method, characterized in that it is applied to the multi-channel pulse acquisition system as claimed in any one of claims 1 to 8, and the multi-channel pulse acquisition method comprises: Monitoring pulse pressure waves in at least two different skin regions through a multi-point pulse sensor, and converting the monitored pulse pressure waves into pulse pressure electrical signals; Performing signal pre-conditioning processing on the pulse pressure electrical signal; the signal pre-conditioning processing includes filtering processing, amplification processing and/or noise reduction processing; Performing analog-to-digital conversion on the pulse pressure electrical signal after the signal pre-conditioning processing, and storing the pulse pressure digital signal obtained after the analog-to-digital conversion in the form of pulse pressure data; wherein the pulse pressure data includes sensor ID information and pressure condition information, the sensor ID information is used to distinguish each piezoelectric sensor, and the pressure condition information is used to identify the pressure condition parameters for obtaining the pulse pressure electrical signal; Acquire pulse pressure data under different acquisition environment parameters; the acquisition environment parameters include pressure condition parameters for each of the piezoelectric sensors; the pressure condition information is used to identify the pressure condition parameters of each of the piezoelectric sensors that acquire the pulse pressure digital signal. 10 . A computer-readable storage medium, characterized in that a program is stored on the medium, and the program can be executed by a processor to implement the multi-channel pulse acquisition method as claimed in claim 9 .