CN-121971058-A - Device, method and apparatus for measuring blood pressure based on boosting process

CN121971058ACN 121971058 ACN121971058 ACN 121971058ACN-121971058-A

Abstract

The embodiment of the application provides equipment, a method and a device for measuring blood pressure based on a boosting process. The device comprises a cuff with an inflatable air bag, a pressure signal acquisition unit, a piezoelectric signal acquisition unit and a processor, wherein the piezoelectric signal acquisition unit and the processor are arranged on one side of the cuff, which is attached to an arm, the pressure signal acquisition unit acquires pressure signals in the cuff in the air bag inflation stage in the process of measuring blood pressure by using the device, the piezoelectric signal acquisition unit synchronously acquires piezoelectric signals generated by the pulsation of a brachial artery in the air bag inflation stage, and the processor performs signal processing on the piezoelectric signals to acquire the signal position of an effective Korotkoff sound signal and acquires a blood pressure measurement result based on the signal amplitude of the pressure signals in the signal position. The device can slowly and uniformly inflate the air bag in the blood pressure measurement process, and immediately stops pressurizing when the pressure reaches the target value is detected, so that the use comfort of the device is improved, the Korotkoff sounds are accurately detected, and the accuracy of blood pressure measurement is improved.

Inventors

LIU YINGJIAN
ZHANG YUJUN
WANG FUZHOU

Assignees

北京汉王大健康科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260409

Claims (11)

1. The device for measuring the blood pressure based on the boosting process is characterized by comprising a cuff provided with an inflatable air bag, a pressure signal acquisition unit, a piezoelectric signal acquisition unit and a processor, wherein the piezoelectric signal acquisition unit is arranged on one side of the cuff, which is attached to an arm, and is a high-frequency instantaneous vibration sensitive sensor, The pressure signal acquisition unit is used for acquiring pressure signals in the cuff at the air bag inflation stage in the process of measuring blood pressure by using the equipment; The piezoelectric signal acquisition unit is used for synchronously acquiring piezoelectric signals generated by brachial artery pulsation in the air bag inflation stage; The processor is used for carrying out band-stop filtering and band-pass filtering signal processing on the frequency spectrum analysis result of the piezoelectric signal to obtain the signal position of the effective Korotkoff sound signal, wherein the center frequency of the band-stop filtering and the high-frequency cut-off frequency of the band-pass filtering are dynamically determined on the basis of the frequency spectrum analysis result; The processor is further configured to obtain a blood pressure measurement result based on a signal amplitude of the pressure signal at the signal location.
2. The apparatus according to claim 1, wherein the obtaining a signal position of the effective koff sound signal based on the band-stop filtering and the band-pass filtering signal processing of the spectrum analysis result of the piezoelectric signal includes: Based on a frequency spectrum analysis result of the piezoelectric signal, denoising the piezoelectric signal by combining band-stop filtering and band-pass filtering to obtain a piezoelectric signal for filtering the working disturbance of the equipment, wherein the piezoelectric signal is used as a Korotkoff sound signal; Performing peak detection on the Korotkoff sound signal to obtain the peak position of the Korotkoff sound signal; Segmenting the Korotkoff sound signal based on the peak position to determine the sequence of the Korotkoff sound signal segment; Respectively carrying out frequency domain feature extraction and time domain feature extraction on each Korotkoff sound signal fragment in the sequence to obtain a sequence of frequency domain features and a sequence of time domain features; Taking the sequence of the frequency domain features and the sequence of the time domain features as input features of a pre-trained neural network model, and carrying out classification prediction based on the input features through the neural network model to obtain a prediction result of a Korotkoff sound signal; and determining the signal position of the effective Korotkoff sound signal based on the prediction result.
3. The apparatus according to claim 2, wherein the denoising processing is performed on the piezoelectric signal based on the result of the spectrum analysis of the piezoelectric signal in combination with band-stop filtering and band-pass filtering, to obtain a piezoelectric signal for filtering the disturbance of the operation of the apparatus itself, as a koff sound signal, comprising: performing segment frequency domain analysis on the piezoelectric signal based on time windows with specified lengths to obtain frequency spectrums of the piezoelectric signal in each time window, wherein the frequency spectrums are used for describing frequency distribution of the piezoelectric signal in the corresponding time window and amplitude distribution of the corresponding frequency signal; Carrying out average processing on the frequency spectrums of each time window along a time axis to obtain an average frequency spectrum; Performing signal analysis processing on the average frequency spectrum to obtain a target frequency in the average frequency spectrum; filtering the piezoelectric signal by using a band-stop filter with a preset frequency bandwidth taking the target frequency as a center frequency to obtain a band-stop filter signal; and filtering the band-stop filtering signal by a band-pass filter with a preset frequency range to obtain a Korotkoff sound signal.
4. The apparatus of claim 3, wherein the performing a segmented frequency domain analysis of the piezoelectric signal based on time windows of specified length to obtain a frequency spectrum of the piezoelectric signal within each time window comprises: Performing partial repeated sliding sampling on the piezoelectric signal by adopting a time window with a specified length to obtain a plurality of piezoelectric signal fragments; and respectively carrying out frequency domain analysis on each piezoelectric signal segment to acquire the frequency spectrum of the piezoelectric signal in each time window.
5. The apparatus of claim 3, wherein the performing signal analysis processing on the average spectrum to obtain the target frequency in the average spectrum comprises: Respectively acquiring frequencies corresponding to the maximum amplitude values in each specified frequency interval as candidate frequencies corresponding to the corresponding specified frequency intervals for a plurality of adjacent specified frequency intervals in the average frequency spectrum; And taking the candidate frequency with the interval between the candidate frequency and the adjacent candidate frequency being larger than or equal to a preset interval threshold value as a target frequency.
6. The apparatus of claim 2, wherein peak detecting the koff sound signal to obtain a peak position of the koff sound signal comprises: Sliding scanning is carried out on the Korotkoff sound signals by adopting a scanning window with a preset length, and signal positions meeting preset conditions are obtained and used as candidate peak positions, wherein the preset conditions are that the amplitudes of the preamble signals of the signal positions in the scanning window are sequentially increased, and the amplitudes of the postamble signals are sequentially decreased; And taking the candidate peak position of which the amplitude of the corresponding Korotkoff sound signal is larger than a preset amplitude threshold value as the peak position of the Korotkoff sound signal.
7. The method for measuring blood pressure based on the boosting process is applied to equipment for measuring blood pressure based on the boosting process, and is characterized by comprising a cuff with an inflatable air bag, a pressure signal acquisition unit, a piezoelectric signal acquisition unit and a processor, wherein the piezoelectric signal acquisition unit is arranged on one side of an arm attached to the cuff, and the piezoelectric signal acquisition unit is a high-frequency instantaneous vibration sensitive sensor, and the method comprises the following steps: Acquiring a pressure signal in a cuff acquired by the pressure signal acquisition unit and a piezoelectric signal generated by brachial artery pulsation and synchronously acquired by the piezoelectric signal acquisition unit in an air bag inflation stage in the blood pressure measurement process by using the equipment; performing band-stop filtering and band-pass filtering signal processing on the frequency spectrum analysis result of the piezoelectric signal to obtain the signal position of the effective Korotkoff sound signal, wherein the center frequency of the band-stop filtering and the high-frequency cut-off frequency of the band-pass filtering are dynamically determined based on the frequency spectrum analysis result; and acquiring a blood pressure measurement result based on the signal amplitude of the pressure signal at the signal position.
8. The method according to claim 7, wherein the obtaining the signal position of the effective koff sound signal based on the band-stop filtering and the band-pass filtering signal processing of the spectrum analysis result of the piezoelectric signal includes: Based on a frequency spectrum analysis result of the piezoelectric signal, denoising the piezoelectric signal by combining band-stop filtering and band-pass filtering to obtain a piezoelectric signal for filtering the working disturbance of the equipment, wherein the piezoelectric signal is used as a Korotkoff sound signal; Performing peak detection on the Korotkoff sound signal to obtain the peak position of the Korotkoff sound signal; Segmenting the Korotkoff sound signal based on the peak position to determine the sequence of the Korotkoff sound signal segment; Respectively carrying out frequency domain feature extraction and time domain feature extraction on each Korotkoff sound signal fragment in the sequence to obtain a sequence of frequency domain features and a sequence of time domain features; Taking the sequence of the frequency domain features and the sequence of the time domain features as input features of a pre-trained neural network model, and carrying out classification prediction based on the input features through the neural network model to obtain a prediction result of a Korotkoff sound signal; and determining the signal position of the effective Korotkoff sound signal based on the prediction result.
9. The device for measuring blood pressure based on the boosting process is characterized by being applied to equipment for measuring blood pressure based on the boosting process, the equipment comprises a cuff with an inflatable air bag, a pressure signal acquisition unit, a piezoelectric signal acquisition unit and a processor, wherein the piezoelectric signal acquisition unit is arranged on one side of an arm attached to the cuff, the piezoelectric signal acquisition unit is a high-frequency instantaneous vibration sensitive sensor, and the device comprises: The signal acquisition module is used for acquiring pressure signals in the cuff acquired by the pressure signal acquisition unit and piezoelectric signals generated by brachial artery pulsation and synchronously acquired by the piezoelectric signal acquisition unit in the air bag inflation stage in the blood pressure measurement process by using the equipment; the signal processing module is used for carrying out band-stop filtering and band-pass filtering signal processing on the frequency spectrum analysis result of the piezoelectric signal to obtain the signal position of the effective Korotkoff sound signal, wherein the center frequency of the band-stop filtering and the high-frequency cut-off frequency of the band-pass filtering are dynamically determined on the basis of the frequency spectrum analysis result; And the blood pressure measurement result acquisition module is used for acquiring a blood pressure measurement result based on the signal amplitude of the pressure signal at the signal position.
10. An electronic device comprising a memory, a processor and program code stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 7 or 8 when executing the program code.
11. A computer readable storage medium having stored thereon program code, which when executed by a processor realizes the steps of the method according to any of claims 7 or 8.

Description

Device, method and apparatus for measuring blood pressure based on boosting process Technical Field The present application relates to the field of detection technology, and in particular, to a device for measuring blood pressure based on a boosting process, a method for measuring blood pressure based on a boosting process, a device for measuring blood pressure based on a boosting process, an electronic device, and a computer readable storage medium. Background The Korotkoff sound method is a non-invasive method for indirectly measuring blood pressure by capturing arterial blood flow sound changes through a stethoscope. In the prior art, when using cuff-type electronic blood pressure measuring equipment to measure blood pressure, a depressurization method is generally adopted, that is, an air bag of a cuff is inflated first, so that the pressure of the cuff on a brachial artery is quickly increased to a target pressure (usually about 20 to 30 millimeters of mercury higher than the estimated systolic pressure) to ensure that the brachial artery is closed under the cuff pressure, then, the air in the air bag is released, and the Korotkoff sound is acquired and the signal positions corresponding to the systolic pressure and the diastolic pressure are determined in the process. In the blood pressure measurement process by the depressurization method, the excessively high pressurization speed and the excessively high pressure are liable to cause discomfort of the user to be measured. Therefore, the inventor starts to research the extraction of the Korotkoff sound signals in the air bag boosting process, and finds that the Korotkoff sound signals in the air bag inflating boosting process have the problems of weak signals, large noise interference and the like, and if the Korotkoff sound signals are detected in the boosting stage for measuring blood pressure, the deviation of the blood pressure measuring precision is large, and the measuring stability is limited. It can be seen that there remains a need for improvements in the art for methods of measuring blood pressure. Disclosure of Invention The embodiment of the application provides a method for measuring blood pressure based on a boosting process and equipment for measuring blood pressure based on the boosting process, which can improve the accuracy of blood pressure measurement while ensuring the comfort of equipment in the process of measuring blood pressure. Correspondingly, the embodiment of the application also provides electronic equipment, a storage medium and a computer program product, which are used for ensuring the realization and the application of the blood pressure measuring method. In order to solve the technical problems, the application is realized as follows: in a first aspect, an embodiment of the present application provides a device for measuring blood pressure based on a boosting process, including a cuff having an inflatable bladder, a pressure signal acquisition unit, a piezoelectric signal acquisition unit disposed on a side of the cuff that is attached to an arm, and a processor, wherein, The pressure signal acquisition unit is used for acquiring pressure signals in the cuff at the air bag inflation stage in the process of measuring blood pressure by using the equipment; The piezoelectric signal acquisition unit is used for synchronously acquiring piezoelectric signals generated by brachial artery pulsation in the air bag inflation stage; the processor is used for performing signal processing on the piezoelectric signals to obtain the signal positions of the effective Korotkoff sound signals; The processor is further configured to obtain a blood pressure measurement result based on a signal amplitude of the pressure signal at the signal location. In a second aspect, an embodiment of the present application provides a blood pressure measurement method applied to a device for measuring blood pressure based on a boosting process, the device including a cuff having an inflatable bladder, a pressure signal acquisition unit, a piezoelectric signal acquisition unit disposed on a side of the cuff attached to an arm, and a processor, the method including: Acquiring a pressure signal in a cuff acquired by the pressure signal acquisition unit and a piezoelectric signal generated by brachial artery pulsation and synchronously acquired by the piezoelectric signal acquisition unit in an air bag inflation stage in the blood pressure measurement process by using the equipment; performing signal processing on the piezoelectric signal to obtain the signal position of an effective Korotkoff sound signal; and acquiring a blood pressure measurement result based on the signal amplitude of the pressure signal at the signal position. In a third aspect, an embodiment of the present application provides a blood pressure measurement device applied to an apparatus for measuring blood pressure based on a boosting process, the apparatus including a cuff having an