Single-channel fetal electrocardiogram blind separation device based on oblique projection and separation method

Abstract

The invention relates to a single-channel fetal electrocardiogram blind separation device based on oblique projection and a separation method. The separation device comprises a single-channel electrocardiogram signal acquisition module, a Doppler fetal heart sound acquisition module, an analog to digital conversion module, a microprocessor and a PC (personal computer) upper computer for separating and displaying signals. A switch-in end of the single-channel electrocardiogram signal acquisition module for acquiring aliasing electrocardiogram signals is connected with an electrocardiogram lead cable, an input end of the Doppler fetal heart sound acquisition module for acquiring fetal heart sound signals is connected with an ultrasonic probe, a switch-out end of the single-channel electrocardiogram signal acquisition module and a switch-out end of the Doppler fetal heart sound acquisition module are respectively connected with an analog input end of the analog to digital conversion module, a data output port of the analog to digital conversion module is connected with the microprocessor, and the microprocessor is connected with the PC upper computer. The separation method includes a fetal electrocardiogram QRS (quantum resonance spectrometer) wave group positioning method based on oblique projection and single-channel fetal electrocardiogram signal blind separation based on oblique projection. The separation device is reasonable in design and is convenient and practical; and the separation method is convenient and practical.

Description

technical field [0001] The invention is a single-channel fetal electrocardiogram blind separation device and separation method based on oblique projection, which belongs to the transformation technology of the single-channel fetal electrocardiogram blind separation device and method based on oblique projection. Background technique [0002] Fetal Electrocardiogram (FECG) is an objective indicator reflecting the electrophysiological activity of the fetal heart, reflecting the growth and health of the fetus during pregnancy. The extraction and analysis of perinatal fetal ECG can determine fetal heart rate and fetal heart function parameters, and timely detect fetal intrauterine hypoxia and other pathological conditions during pregnancy or delivery, so as to take measures as soon as possible to ensure fetal health. [0003] However, in the practical application of fetal ECG signal detection, the ECG signal collected from the surface of the mother's abdomen is mixed with materna...

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Problems solved by technology

[0006] 2) During use, there are many difficulties in determining the electrode position

However, many studies have shown that there is only a rough correspondence between the heart sound signal and the ECG signal, and they are not strictly synchronized, that is, each heart sound corresponds to an ECG wave group, and the ECG signal appears before the heart sound signal at a random time

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