A multi-lead fetal ECG extraction device based on factor synchronization analysis

Abstract

The invention discloses a multi-lead fetal electrocardiogram extraction device based on factor synchronization analysis, which belongs to the field of electrocardiogram signal recognition. In the invention, firstly, the ECG test system synchronously records the multi-lead ECG mixed signal of the pregnant woman’s abdomen and chest and completes the preprocessing; the chest multi-lead ECG mixed signal is input into the principal component analysis module to complete the principal component decomposition; then the chest lead is decomposed The principal component of the abdominal factor is used as a reference signal, and the phase synchronization value between each factor of the abdominal decomposition and the reference signal is calculated and sorted, and then combined with the mother and fetus ECG frequency and waveform characteristics to classify and screen and exclude the mother's ECG factor; use the empirical mode Decompose and exclude non-fetal ECG components to improve the local characteristics of fetal ECG and reconstruct fetal ECG factors; finally, use the inverse operation of factor analysis to reconstruct a clear fetal ECG signal. Compared with the prior art, the fetal electrocardiographic signal extracted by the present invention has more local characteristics of the fetal electrocardiogram, and the signal is smoother, and has important significance for the fetal electrocardiographic signal and perinatal medicine research.

Description

technical field [0001] The invention belongs to the field of electrocardiographic signal identification, in particular to a device for analyzing fetal electrocardiogram extraction based on factor phase synchronization. Background technique [0002] Fetal Electrocardiogram (FECG) is a physiological signal generated by fetal heart activity, which can reflect the real growth and health of the perinatal fetus in pregnant women, and is also an important indicator for pregnant women in prenatal checkups. However, because the fetus is located in the mother's body during the perinatal period, it brings great difficulties to the detection and study of FECG. At present, there are two main ways to detect fetal ECG: one is invasive and invasive fetal scalp electrode method, although this method can obtain relatively clean FECG, it will cause certain damage to mother and fetus; the other is non-invasive A non-invasive abdominal electrode method, that is, electrodes are arranged at diffe...

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Problems solved by technology

Although these methods can extract fetal ECG signals to a certain extent, the obtained signals are either too strict in data collection and have low accuracy, or the extraction or calculation process is too complicated to realize, or requires more manual intervention, etc., which leads to various The applicability of similar methods is limited, so there is still no particularly suitable method for non-invasive fetal ECG extraction.

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