PPG signal clustering center acquisition method and device and PPG signal processing method and device

Abstract

The invention relates to a PPG signal clustering center acquisition method, a PPG signal processing method and a PPG signal processing device. The PPG signal clustering center acquisition method comprises the following steps: S11, acquiring and preprocessing a sample PPG signal to obtain a second pulse; s12, performing fast Fourier transform on the second pulse, extracting a frequency component, and normalizing characteristic parameters of the frequency component to obtain a third pulse; s13, clustering the third pulse to obtain an initial clustering cluster and an initial clustering center; s14, constructing an MAE similarity matrix according to the normalized parameter MAE values of the two initial clustering centers; s15, acquiring an MAE value of a second minimum value of row vectors in the MAE similarity matrix, when two MAE values which are smaller than a first preset value and correspond to the same initial clustering center exist, combining the initial clustering cluster corresponding to the MAE value as a new initial clustering cluster, and executing S14 by taking a mean pulse of the initial clustering center corresponding to the MAE value as an initial clustering center of the new initial clustering cluster, otherwise, taking the initial clustering center as the target clustering center.

Description

technical field [0001] The present application relates to the technical field of signal processing, and more particularly, to a method and device for acquiring a PPG signal clustering center and a PPG signal processing method and device. Background technique [0002] Hypertension is one of the most common chronic diseases in life and the primary factor affecting cardiovascular and cerebrovascular diseases. There are many reasons for high blood pressure: bad living habits, genetic factors, drug factors, and other diseases. Therefore, it is very important to regularly monitor blood pressure and provide early warnings for physiological diseases. At present, most of the blood pressure monitoring methods use cuff-type devices, but due to their inportability, they cannot be used in daily life scenarios, and cannot monitor blood pressure continuously for a long time. Photoplethysmograph (PPG) signals are widely used in medicine to measure heart rate and blood oxygen saturation. T...

AI Technical Summary

Problems solved by technology

The currently commonly used PPG signal clusters based on clustering results often have a huge and repetitive workload and work content in the manual marking method

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