Heart rate turbulence tendency extraction method based on cloud model and scatter diagram
A technology for sinus heart rate oscillation and trend extraction, which is applied in the field of biomedical signal processing and can solve the problems of ignoring the overall characteristics and the PLR method does not guarantee that the time series has only one basic trend.
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[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the following description is only for explaining the present invention and not limiting its content.
[0038]According to the unified requirements of the portable ECG monitoring system, the present invention uniformly converts the sampling frequency of ECG signals used in the MIT-BIH database of the Massachusetts Institute of Technology from 360 Hz to 200 Hz through interpolation extraction. For the baseline drift, power frequency fundamental wave and its harmonic interference, myoelectric interference, etc. contained in the electrocardiographic signal, the present invention uses bior2.2 wavelet to perform three-layer decomposition and reconstruction combined with an improved threshold algorithm to eliminate them. Then, the bior2.2 wavelet was used to decompose the ECG signal into three layers to detect the R wave, and the HRT sampl...
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