Unlock instant, AI-driven research and patent intelligence for your innovation.

A Blind Separation Method of Fetal ECG Based on Low Signal-to-Noise Ratio

A fetal ECG, low signal-to-noise ratio technology, applied in the field of medical devices, can solve problems such as complex calculation

Active Publication Date: 2018-05-25
GUANGDONG UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extraction methods of these technologies are subject to many limitations, or the calculation is too complicated, or more manual intervention is required

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Blind Separation Method of Fetal ECG Based on Low Signal-to-Noise Ratio
  • A Blind Separation Method of Fetal ECG Based on Low Signal-to-Noise Ratio
  • A Blind Separation Method of Fetal ECG Based on Low Signal-to-Noise Ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] like figure 1 As shown, the present invention is based on the fetal electrocardiogram blind separation method under the low signal-to-noise ratio condition, comprises the following steps:

[0026] Step 1, preprocessing the three-way signal collected from the mother's abdomen, figure 2 The sampling frequency fs=1000Hz of the fetal electrocardiogram signal in standard database, the signal that will gather Perform comb filtering to eliminate baseline drift, 50Hz power frequency interference and high-order harmonic interference, anti-aliasing low-pass filtering to remove signals with frequencies above 500Hz, and obtain three-way signals after filtering like image 3 shown;

[0027] Step 2, for the three-way signal The following processes were carried out respectively: firstly, the four-scale wavelet transformation was performed using the db2 wavelet base to obtain the approximation coefficients and detail coefficients, and then the peak detection function was used t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a fetal electrocardiogram blind separation method based on low signal-to-noise ratio conditions. Firstly, multi-channel source signals are comb-filtered to eliminate power frequency interference of 50 Hz and its high-order harmonics, baseline drift, and low anti-aliasing. The high-frequency signal components whose frequency is greater than half of the sampling frequency are removed by filtering, and then wavelet transform is performed on the filtered source signal to obtain the high-frequency coefficients and low-frequency coefficients of each scale, and the peak function processing is performed on the high-frequency coefficients of each scale to obtain The high-frequency coefficients of the electrical information are obtained by wavelet reconstruction to obtain the mother's ECG signal, and then the filtered source signal is subtracted from the reconstructed mother's ECG signal to obtain the noisy fetal ECG signal, and finally the blind separation algorithm is used Blind separation is carried out, and multiple channels of fetal ECG signals containing noise are processed to obtain signals after multiple channels of blind separation. The invention has great significance for the monitoring of the fetus in the perinatal period, the method for extracting the fetal electrocardiogram is simple, the calculation speed is fast, and the accuracy is high.

Description

technical field [0001] The invention relates to a method for blind separation of fetal electrocardiogram under the condition of low signal-to-noise ratio, and belongs to the field of medical equipment. Background technique [0002] Fetal electrocardiogram is an important means of fetal monitoring and an important method to detect the health status of the fetus in the womb, which can reflect the whole picture of the fetal heart. However, due to the small amplitude of the collected fetal ECG signal, the signal-to-noise ratio is low, and most of them are mixed with large-amplitude and widely distributed noise interference, such as common power frequency interference, noise caused by breathing, and myoelectricity. The most important interference is Maternal ECG (MECG), which brings great difficulties to medical diagnosis. Therefore, it is of great practical value and clinical significance to study how to obtain perinatal fetal ECG signals accurately, conveniently and effectivel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0448A61B5/288
Inventor 谢胜利王旭蔡坤谢侃
Owner GUANGDONG UNIV OF TECH