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Method and device for processing electrophysiological signals

A kind of electrophysiological signal, processing method technology

Active Publication Date: 2019-10-18
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Power frequency interference will affect signal detection, resulting in inaccurate calculation of electrophysiological signals
Usually, the removal methods of power frequency interference are mostly from the perspective of random signal processing. Although the effect is good, there are often shortcomings such as high algorithm complexity and difficulty in understanding.
In addition, there is a method to remove power frequency interference by increasing the signal sampling rate to more than twice the frequency of the power frequency interference signal, applying the sampling theorem, and removing it by designing a power frequency notch filter, but it will take up a lot of hardware resources

Method used

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  • Method and device for processing electrophysiological signals
  • Method and device for processing electrophysiological signals
  • Method and device for processing electrophysiological signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] figure 1 It is a flow chart of a method for processing electrophysiological signals in Embodiment 1 of the present invention. This embodiment is applicable to the situation where electrophysiological signals need to be processed. The method can be executed by an electrophysiological signal processing device, which can pass Realized by means of hardware and / or software, the device is usually configured in a device that provides image processing functions. Specifically, the method for processing electrophysiological signals in this embodiment includes: step S110, step S120, step S130, step S140, and step S150.

[0026] Step S110, acquiring electrophysiological signals and environmental electrical signals.

[0027] Specifically, the electrophysiological signal to be processed is collected, and its frequency is measured, and the frequency is recorded as H 1 . Electrophysiological signals are important information reflecting various physiological states of the human body....

Embodiment 2

[0038] Figure 2a It is a flowchart of an electrophysiological signal processing method in Embodiment 2 of the present invention. This embodiment further explains step S120 and step S150 on the basis of the first embodiment. In step S120, determining the frequency range of the frequency of the power frequency interference signal generated by the environmental electrical signal to the electrophysiological signal includes: calculating the power frequency interference signal according to the frequency of the power frequency signal and the frequency of the environmental electrical signal The frequency range in which the frequency is located. In step S150, removing the spectrum aliasing signal from the sampled electrophysiological signal according to the frequency of the spectrum aliasing signal includes: notching the sampled electrophysiological signal according to the frequency of the spectrum aliasing signal. Specifically, the electrophysiological signal processing method in t...

Embodiment 3

[0056] image 3 It is a structural diagram of an electrophysiological signal processing device in Embodiment 3 of the present invention. The device is suitable for performing the electrophysiological signal processing methods provided in the first embodiment of the present invention and the second embodiment of the present invention, and the device specifically includes: an acquisition unit 310, a determination unit 320, a sampling unit 330, a calculation unit 340 and a processing unit 350 .

[0057] The acquiring unit 310 is configured to acquire electrophysiological signals and environmental electrical signals.

[0058] The determination unit 320 is connected to the acquisition unit 310 and determines the frequency range of the frequency of the power frequency interference signal generated by the environmental electrical signal to the electrophysiological signal.

[0059] The sampling unit 330 is connected to the determining unit 320 and configured to sample the electrophy...

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Abstract

The embodiment of the invention discloses an electrophysiological signal processing method and device. The processing method comprises the steps of obtaining electrophysiological signals and environmental electrical signals; determining the frequency range of the frequency of power frequency interference signals generated by the environmental electrical signals on the electrophysiological signals; sampling the electrophysiological signals according to a sampling frequency within the frequency range; determining the frequency of spectrum aliasing signals corresponding to the electrophysiological signals and the environmental electrical signal according to the sampling frequency within the frequency range and the frequency of the power frequency interference signals; removing the spectrum aliasing signals from the sampled electrophysiological signals according to the frequency of the spectrum aliasing signals. The power frequency interference in the electrophysiological signals is removed without increasing hardware resources.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of signal processing, and in particular, to a method and device for processing electrophysiological signals. Background technique [0002] Power frequency interference refers to the interference caused by the radiation of the mains voltage with a frequency of 50 Hz in the form of electromagnetic waves. Since the acquisition circuit and the power supply circuit in the user equipment cannot share a good ground, an effective voltage difference is formed from the power supply to the acquisition circuit, so the power signal enters the acquisition circuit and causes interference. Power frequency interference will cause interference to electrical and electronic equipment, resulting in abnormal operation of the equipment. [0003] The problem of removing power frequency interference is often encountered in the measurement of electrophysiological signals. Power frequency interference will affe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/04
CPCA61B5/316
Inventor 郑晓波
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD