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A method and device for removing electrostatic interference in electrocardiographic signals

A technology of ECG signal and static interference, which is applied in the field of signal processing, can solve the problem of low accuracy of static interference and achieve the effect of solving low accuracy

Active Publication Date: 2018-10-16
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, embodiments of the present invention provide a method and device for removing static interference in ECG signals to solve the problem of low accuracy of the existing extended Kalman filter for removing static interference in ECG signals

Method used

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  • A method and device for removing electrostatic interference in electrocardiographic signals
  • A method and device for removing electrostatic interference in electrocardiographic signals
  • A method and device for removing electrostatic interference in electrocardiographic signals

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Embodiment 1

[0023] figure 1 It shows the implementation flow of the method for removing electrostatic interference in ECG signals provided by Embodiment 1 of the present invention, and the implementation flow is described in detail as follows:

[0024] In step S101, the forward Kalman filter data of the signal to be processed is obtained;

[0025] In an embodiment of the present invention, the signal to be processed is an electrocardiographic signal containing static electricity.

[0026] In the embodiment of the present invention, the extended Kalman filter is used to obtain the forward Kalman filter data of the signal to be processed.

[0027] The specific content of the traditional extended Kalman filter theory is as follows:

[0028] The essence of using the extended Kalman filter to remove the noise in the ECG signal is: taking the noisy ECG signal as an observation, and using the extended Kalman filter to dynamically estimate the state quantity, that is, the ECG signal.

[0029] ...

Embodiment 2

[0082] figure 2 It shows the implementation process of the method for removing electrostatic interference in ECG signals provided by Embodiment 2 of the present invention, and the implementation process is described in detail as follows:

[0083] In step S201, obtain relevant parameters of the signal to be processed;

[0084] In an embodiment of the present invention, the signal to be processed is an electrocardiographic signal containing static electricity.

[0085] In the embodiment of the present invention, the relevant parameter of the signal to be processed is the mean value of the process noise vector and the forward Kalman filter observation noise autocorrelation matrix R(2,2).

[0086] Further, said acquisition of relevant parameters of the signal to be processed includes:

[0087] Collect the pending signals of N ECG cycles and store them in a 2×M matrix O, the kth of the matrix O 0 column vector Among them, k 0 =1,2,...,M,M,N are integers greater than zero, ...

Embodiment 3

[0134] Figure 7 A schematic diagram of the composition of the device for removing electrostatic interference in ECG signals provided by Embodiment 3 of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0135] A data acquisition module 71, configured to acquire forward Kalman filter data of the signal to be processed;

[0136] The signal acquisition module 72 is configured to acquire an electrocardiographic signal in the signal to be processed according to the forward Kalman filter data.

[0137] The device for removing electrostatic interference in ECG signals provided by the embodiment of the present invention can be used in the first corresponding method embodiment above. For details, refer to the description of the first embodiment above, and will not be repeated here.

[0138] In the embodiment of the present invention, the forward Kalman filte...

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Abstract

The invention belongs to the technical field of signal processing, and provides a method and device for removing electrostatic interference in an electrocardiosignal. The method comprises the steps that forward Kalman filtering data of a signal to be processed is acquired; the electrocardiosignal in the signal to be processed is acquired according to the forward Kalman filtering data. According to the method and device, the problem that an existing extended Kalman filter is low in accuracy of removing the electrostatic interference in the electrocardiosignal is solved.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a method and a device for removing static interference in electrocardiographic signals. Background technique [0002] ECG signals can provide doctors with important clinical information, so they are widely used in health status monitoring. Due to the influence of external electric fields, the detection of ECG signals is often disturbed by static signals. Because the spectrum of the static signal overlaps with the spectrum of the ECG signal, it is difficult for traditional frequency filters to remove static interference. At present, wavelet transform and extended Kalman filter are commonly used to remove electrostatic interference in ECG signals. However, the complexity of wavelet transform is too large to be applied to the removal of electrostatic interference in ECG signals. The Kalman filter can dynamically estimate the state quantity according to the ob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/00
CPCA61B5/7203
Inventor 李烨饶永康李鑫
Owner SHENZHEN INST OF ADVANCED TECH
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