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Method for detecting quasi-periodicity physiological signal feature points

A physiological signal, quasi-periodic technology, used in blood characterization devices, diagnostic recording/measurement, medical science, etc., can solve problems such as poor anti-interference ability

Active Publication Date: 2014-02-12
SHENZHEN BIOCARE BIO MEDICAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the technical problem of poor anti-interference ability of the waveform feature point detection method in the prior art, the present invention provides a quasi-periodic physiological signal peak detection method and device

Method used

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  • Method for detecting quasi-periodicity physiological signal feature points
  • Method for detecting quasi-periodicity physiological signal feature points
  • Method for detecting quasi-periodicity physiological signal feature points

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] figure 1 It is a flow chart of the peak detection method in Embodiment 1 of the present invention.

[0077] Please refer to figure 1 The peak detection method of the quasi-periodic physiological signal according to the embodiment of the present invention includes a signal to be detected step S12, a smoothing filter step S14, a reference point acquisition step S16, a reference signal acquisition step S18, a peak interval acquisition step 20, and a signal amplitude acquisition step Step S22 and judgment step S24. Each step will be described in detail below to illustrate the peak detection method of this embodiment.

[0078] The signal-to-be-detected acquisition step S12 is used to acquire the input signal of a current period of time, and the acquired input signal is the signal to be detected. The detected object of the peak detection method in the embodiment of the present invention is a segment of signal. The method can be applied not only to the field of real-time p...

Embodiment 2

[0087] figure 2 It is a flowchart of a peak detection method according to another embodiment of the present invention.

[0088] In the case where the anti-interference ability or the accuracy is required to be high, the inventors of the present application also proposed the peak detection method in the second embodiment. The peak detection method implemented in this embodiment is mainly formed by adding a false removal step on the basis of the first embodiment, and the differences from the first embodiment are mainly described below.

[0089] Please refer to figure 2 Compared with the detection method of Embodiment 1, the peak detection method of the embodiment of the present invention has more threshold acquisition step S11, update threshold (S25, S26), first de-spoofing step S19, second de-spoofing step S21, third de-spoofing step One or more of S21' and the fourth de-spoofing step S23.

[0090] The threshold acquiring step S11 is used to acquire the amplitude threshold...

Embodiment 3

[0105] This embodiment provides a method for detecting peaks and valleys of quasi-periodic physiological signals. The peak-to-valley detection method includes: firstly, using the peak detection method in Embodiment 1 or Embodiment 2 to obtain legal peaks; then, obtaining the minimum minimum value point before the legal peak, and the minimum minimum value point is a legal valley.

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Abstract

The invention relates to the technical field of medical equipment, and provides a wave crest detection method of quasi-periodicity physiological signals. The method comprises the step of obtaining signals to be detected, the step of smoothing filtering, the step of obtaining a reference point, the step of obtaining a reference signal, the step of obtaining wave crest intervals, the step of obtaining signal amplitudes and the step of judging. By the adoption of the method, smoothing filtering is conducted twice, then intersecting points of two curves after the smoothing filtering are searched, the positions of candidate wave crests can be locked, and finally judgment and detection are carried out through the two factors of the wave crest intervals and the signal amplitudes. Strong anti-jamming capability and high detection accuracy are achieved.

Description

technical field [0001] The invention relates to the technical field of waveform detection and the technical field of medical equipment, in particular to the detection of characteristic points of quasi-periodic physiological signals. Background technique [0002] Generally, physiological signals such as invasive pulse wave (signal), non-invasive pulse wave (signal), blood oxygen waveform (signal), and ECG waveform (signal) are quasi-periodic physiological signals. The "period" of the quasi-periodic physiological signal is the time interval during which a certain characteristic waveform repeatedly appears. The time interval is not fixed like that of the periodic signal, but fluctuates in a small range, so it is called a quasi-period. For example, the characteristic waves of the ECG signal are R waves or QRS complexes, the cycle of the ECG signal varies from person to person, and the cycle of the ECG signal of the same person at different times may also be different. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0205A61B5/145A61B5/0452
Inventor 王见荣李德东洪洁新
Owner SHENZHEN BIOCARE BIO MEDICAL EQUIP CO LTD
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