CN-121971072-A - BCG signal acquisition and blood pressure monitoring system, method, equipment, medium and product

CN121971072ACN 121971072 ACN121971072 ACN 121971072ACN-121971072-A

Abstract

The application discloses a system, a method, equipment, a medium and a product for BCG signal acquisition and blood pressure monitoring, and relates to the field of signal detection, wherein a flexible piezoelectric sensing unit converts a BCG signal into a charge signal, a front-end conditioning circuit converts the charge signal into a voltage signal, the distortion problem of remote signal transmission is solved by utilizing the unattenuated characteristic of charge transmission, a front-end conditioning circuit is used for precisely cutting off a physiological frequency band, the phase distortion of the BCG signal is reduced to the maximum extent, a micro-processing unit acquires a data message and is transmitted to a cloud server through a 4G communication module to obtain a standardized sequence, a cloud platform server adopts a Mamba model, the linear complexity in the long sequence is reduced through a selective state space mechanism, the physiological key characteristics in the long sequence are adaptively screened through a selective scanning mechanism, the blood pressure monitoring result is inferred and output, and the accuracy of blood pressure prediction in the dynamic process is remarkably improved.

Inventors

DING ZHENGLIANG
ZHANG XUSHENG
WANG YAN
DAI GUOJUN
LUO DING

Assignees

杭州电子科技大学

Dates

Publication Date: 20260505
Application Date: 20260128

Claims (10)

1. A BCG signal acquisition and blood pressure monitoring system, comprising: the flexible piezoelectric sensing unit is used for sensing a BCG signal and converting the BCG signal into a charge signal; the front-end conditioning circuit is used for mapping the charge signal into a voltage signal and carrying out filtering processing on the voltage signal according to a set cut-off frequency; the micro-processing unit is used for sampling the analog voltage signal after the filtering processing at equal intervals to generate a discrete sequence, and packaging the discrete sequence into a data message according to a preset packaging protocol; The 4G communication module is used for transmitting the data message to a cloud server; the cloud server is used for converting the data message into a standardized sequence, the standardized sequence is a long sequence, the standardized sequence is input into a Mamba model, and feature extraction is performed on the standardized sequence through a selective state space mechanism and a selective scanning mechanism, and a blood pressure monitoring result is output.
2. The BCG signal acquisition and blood pressure monitoring system of claim 1, wherein the flexible sensing unit is a strip-shaped flexible material embedded with a PVDF piezoelectric film; When the PVDF piezoelectric film is subjected to pressure deformation, the dipoles in the piezoelectric film displace to generate charge signals ; Wherein d 33 is physical displacement of the dipole, and F is pressure applied to the human body.
3. The BCG signal acquisition and blood pressure monitoring system of claim 1, wherein the front-end conditioning circuit comprises a pre-charge amplifying circuit and an active filter circuit; the preposed charge amplifying circuit is used for converting charge signals generated by the PVDF piezoelectric film into voltage signals; The active filter circuit is a 6-order active Butterworth band-pass filter and is used for carrying out band cutting on the voltage signal, retaining the effective BCG signal characteristics and generating an analog voltage signal after filtering.
4. A BCG signal acquisition and blood pressure monitoring system in accordance with claim 3, characterized in that the cut-off frequency of the 6 th order active butterworth band-pass filter is in the range of 0.5Hz-40Hz.
5. The BCG signal acquisition and blood pressure monitoring system according to claim 1, wherein the micro-processing unit comprises an MCU controller and an ADC digital-to-analog conversion module, wherein the MCU controller is connected with the ADC digital-to-analog conversion module; the ADC digital-to-analog conversion module is used for carrying out equidistant sampling on the analog voltage signal after the filtering processing, and inputting a discrete sequence generated by sampling into a ring buffer area of the MCU controller; the MCU controller is used for packaging the discrete sequence into a data message with a time stamp and check bits according to a preset communication protocol.
6. The BCG signal acquisition and blood pressure monitoring system of claim 1, wherein the cloud server performs a median filtering and normalization algorithm on the data message to determine a standardized sequence.
7. A BCG signal acquisition and blood pressure monitoring method, wherein the BCG signal acquisition and blood pressure monitoring method is applied to a BCG signal acquisition and blood pressure monitoring system of claims 1-6, the BCG signal acquisition and blood pressure monitoring method comprising: sensing a BCG signal through a flexible piezoelectric sensing unit, and converting the vibration signal into a charge signal; Mapping the charge signal into a voltage signal through a front-end conditioning circuit, and performing filtering processing on the voltage signal according to a set cut-off frequency; the analog voltage after the filtering processing is sampled at equal intervals by a micro-processing unit and is used for generating a discrete sequence, and the discrete sequence is packaged into a data message according to a preset packaging protocol; The data message is transmitted to a cloud server through a 4G communication module; and converting the data message into a standardized sequence through a cloud server, wherein the standardized sequence is a long sequence, inputting the standardized sequence into a Mamba model, extracting features of the standardized sequence through a selective state space mechanism and a selective scanning mechanism, and outputting a blood pressure monitoring result.
8. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor executes the computer program to implement a BCG signal acquisition and blood pressure monitoring method as claimed in claim 7.
9. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements a BCG signal acquisition and blood pressure monitoring method as claimed in claim 7.
10. A computer program product comprising a computer program which, when executed by a processor, implements a BCG signal acquisition and blood pressure monitoring method as claimed in claim 7.

Description

BCG signal acquisition and blood pressure monitoring system, method, equipment, medium and product Technical Field The application relates to the field of signal detection, in particular to a system, a method, equipment, a medium and a product for BCG signal acquisition and blood pressure monitoring. Background The existing dynamic blood pressure monitoring technology is mainly divided into a cuff type and a flexible electronic type, the cuff type equipment is huge in volume and cannot realize continuous monitoring, and the existing flexible ballistocardiogram (Ballistocardiogram, BCG) signal monitoring scheme has the following pain points that under the traditional voltage acquisition mode, the sensor outputs voltageInversely proportional to the total equivalent capacitance of the system (including sensor capacitance and cable distribution capacitance). When the transmission distance increases, the distributed capacitance increases to cause serious attenuation of the signal amplitude, and the BCG signal sampling rate is usually higher to cause extremely long input sequence, so that the calculation complexity of the conventionally adopted transducer model increases quadratically with the sequence lengthThe problem of gradient disappearance which is easily generated by the RNN model. The prior art adopts a voltage acquisition mode, so that signals are easy to be interfered by cable swing and length change, the signal quality is unstable, and the problems that when a back-end processing model (such as CNN and LSTM) faces high-frequency long-sequence signals, the consumption of calculation resources and the precision of long-sequence feature extraction are difficult to balance exist. Disclosure of Invention The application aims to provide a BCG signal acquisition and blood pressure monitoring system, a BCG signal acquisition and blood pressure monitoring method, BCG signal acquisition and blood pressure monitoring equipment, media and products, so as to solve the problems that the stability of the quality of blood pressure signals is poor and the calculation resource consumption and the accuracy of long-sequence feature extraction are difficult to balance due to overlong cables. In order to achieve the above object, the present application provides the following. In a first aspect, the present application provides a BCG signal acquisition and blood pressure monitoring system, specifically including. The flexible piezoelectric sensing unit is used for sensing a BCG signal and converting the BCG signal into a charge signal, wherein the BCG signal is a vibration signal. And the front-end conditioning circuit is used for mapping the charge signal into a voltage signal and carrying out filtering processing on the voltage signal according to the set cut-off frequency. And the micro-processing unit is used for sampling the filtered analog voltage signal at equal intervals to generate a discrete sequence, and packaging the discrete sequence into a data message according to a preset packaging protocol. And the 4G communication module is used for transmitting the data message to a cloud server. The cloud server is used for converting the data message into a standardized sequence, the standardized sequence is a long sequence, the standardized sequence is input into a Mamba model, and feature extraction is performed on the standardized sequence through a selective state space mechanism and a selective scanning mechanism, and a blood pressure monitoring result is output. In a second aspect, the application also provides a BCG signal acquisition and blood pressure monitoring method, which comprises the following steps. And sensing the BCG signal through the flexible piezoelectric sensing unit, and converting the vibration signal into a charge signal. And mapping the charge signal into a voltage signal through a front-end conditioning circuit, and performing filtering processing on the voltage signal according to a set cut-off frequency. And the micro-processing unit is used for sampling the analog voltage after the filtering processing at equal intervals to generate a discrete sequence, and packaging the discrete sequence into a data message according to a preset packaging protocol. And the data message is transmitted to a cloud server through a 4G communication module. And converting the data message into a standardized sequence through a cloud server, wherein the standardized sequence is a long sequence, inputting the standardized sequence into a Mamba model, extracting features of the standardized sequence through a selective state space mechanism and a selective scanning mechanism, and outputting a blood pressure monitoring result. In a third aspect, the application provides a computer device comprising a memory, a processor to store a computer program on the memory and executable on the processor, the processor executing the computer program to implement the steps of a BCG signal acquisition and blood pressure monitori