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Movement Interference Removal Method for Monitoring/Detecting ECG Signals in Exercise State

A technology of ECG signal and motion state, which is applied in the field of medical treatment, can solve problems such as the inability to adopt adaptive filter design, and achieve the effect of small distortion

Active Publication Date: 2017-08-29
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is not possible to use existing adaptive filter designs while minimizing these two terms

Method used

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  • Movement Interference Removal Method for Monitoring/Detecting ECG Signals in Exercise State
  • Movement Interference Removal Method for Monitoring/Detecting ECG Signals in Exercise State
  • Movement Interference Removal Method for Monitoring/Detecting ECG Signals in Exercise State

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Embodiment Construction

[0050] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0051] The first embodiment of the present invention relates to an adaptive filter for fast tracking non-stationary signals. In this embodiment, it consists of two independent adaptive filters B101, B102 and a weight adaptive combiner B103 ( image 3 ).

[0052] The main input signal d(k) and the reference input signal X(k) serve as inputs to two independent adaptive filters B101, B102. The outputs of the independent ada...

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Abstract

The invention provides a motion artifact removing method for monitoring / detecting ECG (Electrocardiograph) signals at a motion state, which is characterized in that a plurality of independent adaptive filter units are utilized; all independent filter subunits adopt respective filter algorithms, and the output of each independent filter subunit is adjusted by virtue of self-adaptive weight; the output of a junction filter is finally obtained after operation, so that the junction filter can quickly track unsteady signals. The plurality of independent adaptive filter units use the same main input and reference input signal source. One part of the adaptive filter units has the characteristic of high convergence speed, and the other part of the adaptive filter units has the characteristic of high convergence accuracy; by judging the unsteady degree of input signals, the output weight of each filter is changed, and the final output of the overall filters is obtained after passing a weight adaptive combiner. Accordingly the junction filter can quickly track the unsteady signals.

Description

technical field [0001] The invention relates to a medical information processing method, more specifically to a motion interference removal method for monitoring / detecting electrocardiographic signals in a motion state. It belongs to the field of medical medical technology. Background technique [0002] When monitoring (detecting) ECG signals in a state of exercise, motion interference is a kind of noise that is difficult to remove. Mainly because the frequency of motion interference covers the frequency of the ECG signal, traditional filters cannot remove motion interference without distorting the ECG signal [N.V.Thakor and Y.S.Zhu, "APPLICATIONS OF ADAPTIVE FILTERING TO ECGANALYSIS-NOISE CANCELLATION AND ARRHYTHMIA DETECTION," Ieee Transactions on Biomedical Engineering, vol. 38, pp. 785-794, Aug 1991.]. [0003] The main source of motion interference is the change of the electrode-skin contact impedance caused by motion. Therefore, the motion interference in ECG signal...

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Application Information

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IPC IPC(8): A61B5/0402
Inventor 张洹千赵建龙金庆辉张树林王晓冬其他发明人请求不公开姓名
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI