Method for detecting maternal electrocardiogram R peak on single-channel pregnant woman's abdominal wall myoelectricity

Abstract

The invention provides a method for detecting the maternal electrocardiogram R peak on single-channel pregnant woman's abdominal wall myoelectricity. The method comprises the steps that 1, one-channelpregnant woman's abdominal wall myoelectricity signal is read; 2, the maternal electrocardiogram R peak on the abdominal wall myoelectricity signal is initially detected or pre-detected; 3, accordingto an initial detection result, an adaptive Gaussian dictionary is constructed, and based on the constructed adaptive Gaussian dictionary, enhancement of the maternal electrocardiogram R peak is achieved through sparse representation; 4, the R peak is detected on a maternal electrocardiogram R peak enhancement signal, and the position of the R peak is output. The method is characterized in that the Gaussian dictionary obtained in the step 3 is composed of Gaussian atoms corresponding to maternal electrocardiogram components, Gaussian atoms corresponding to fetal electrocardiogram components,and Gaussian atoms corresponding to noise components, wherein the Gaussian atoms corresponding to the maternal electrocardiogram components only involves one scale, and the scale is obtained through optimization according to the conditions of the maternal electrocardiogram R peak obtained through initial detection of the abdominal wall myoelectricity signal.

Description

technical field [0001] The present application relates to a method for detecting the R-peak of the maternal electrocardiogram (ECG) on the collected single-channel pregnant woman's abdominal wall electrical signal based on a computer program. [0002] The electrocardiogram is recorded from the abdominal wall of pregnant women, aiming to separate the fetal electrocardiogram from it, but the recorded abdominal wall electricity, in addition to the fetal electrocardiogram component, also contains maternal electrocardiogram components and other noises. To successfully separate the fetal ECG components, one key is to accurately estimate the maternal ECG components; and to accurately estimate the maternal ECG components, a key link is to first conduct high-quality detection of the R peak of the maternal ECG on the abdominal wall. High-quality and accurate detection of the R-peak in the maternal ECG on the abdominal wall is challenging in situations where the signal-to-noise ratio is ...

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Problems solved by technology

[0009] The fixed dictionary in [1] uses multiple scale atoms corresponding to maternal ECG, fetal ECG and other noise components. It has more advantages than the single scale of continuous wavelet transform, but its dictionary is a predetermined The fixed dictionary does not make adaptive changes according to the waveform characteristics of the maternal ECG signal in the abdominal wall electrical signal to be analyzed. Therefore, its enhancement and R-peak detection effects have certain limitations

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