Method and device for extracting characteristic parameter in human body waveform

A technology of characteristic parameters and extraction methods, which is applied in the field of signal processing, can solve problems such as the inability to accurately extract characteristic parameter points, and achieve the effects of fast operation speed, reliable identification results, and wide application range

Inactive Publication Date: 2010-06-16
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect that the prior art cannot accurately extract the characteristic parameter points in the pulse

Method used

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  • Method and device for extracting characteristic parameter in human body waveform
  • Method and device for extracting characteristic parameter in human body waveform
  • Method and device for extracting characteristic parameter in human body waveform

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] In one embodiment of the present invention, taking the joint pulse wave data obtained by the EZP210-M1 pulse collection device as an example, how to realize the extraction of characteristic parameter points in the joint pulse wave data is described.

[0047] Assume that the data obtained from the EZP210-M1 pulse acquisition device is as follows figure 2 As shown, it includes a certain moment in the measurement process (instant domain value) and the pulse pressure value at that moment (ie the measured value). Through the above data, the relevant pulse wave waveform can be obtained. In the present invention, characteristic parameter points such as the starting point of the waveform, the peak point of the pulse wave, the peak point of the front wave of the dicrosis, the peak point of the descending gorge and the peak point of the dicrosis...

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Abstract

The invention provides a method for extracting characteristic parameters in human body waveform, comprising the following steps: searching a waveform peak value in a waveform period on original waveform by an n/m sliding window logical approach; searching the lowest point of the waveform around the obtained peak value points, thereby obtaining the initial point of the waveform; carrying out first-order difference and second-order difference operations on the original waveform; utilizing the second-order difference result waveform to find out a dicrotic notch peak value from an original oscillogram, and utilizing the result waveforms of the first-order difference and second-order difference to find out the peak value before dicrotic pulse from the original oscillogram. The invention also comprises utilizing a two-point smoothing filter method for N times to smoothly filter the original waveform. The characteristic parameter extraction in waveform can be realized on a computer by the characteristic parameter extraction method of the invention, and compared with the common artificial method in the existing operation, the method of the invention has the advantages of high accuracy and reliable marking result.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a method for automatically extracting characteristic parameters in human body waveforms by using computer technology and signal processing technology. Background technique [0002] The usual method of pulse diagnosis in traditional Chinese medicine is that the doctor of traditional Chinese medicine uses fingers to touch and press the three parts of the patient's Cunkou radial artery at Cun, Guan and Chi, and feels the changes of the patient's pulse wave by applying different pressures such as floating, medium and sinking with the fingers. A series of pulse waves containing information such as pulse ups and downs, strength, trend, shape, width and rhythm, etc., corresponding to pressures such as floating, medium and sinking. This pulse wave containing pulse information is also called For the pulse condition. Traditional Chinese medicine has a lot of subjectivity in pulse diagnosi...

Claims

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Application Information

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IPC IPC(8): A61B5/00
Inventor 王睿宫继兵陆世龙张磊崔莉
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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