PPG signal quality evaluation method and device, wearable device and storage medium

Abstract

The invention discloses a PPG signal quality evaluation method and device, a wearable device and a storage medium, and aims at evaluating whether a PPG signal collected by the wearable device can be analyzed or not. The wearable device is provided with an acceleration sensor. The PPG signal quality evaluation method comprises the following steps of: acquiring the PPG signal collected by the wearable device and an acceleration signal output by the acceleration sensor; performing time domain-to-frequency domain conversion on the obtained PPG signal and acceleration signal to obtain a PPG signaland an acceleration signal in a frequency domain; and comparing the amplitude spectrum of the PPG signal and the amplitude spectrum of the acceleration signal in the frequency domain to obtain a quality evaluation result of the PPG signal. According to the invention, the quality of the PPG signal is obtained through the signal characteristics in the frequency domain, so that the problem that the signal quality cannot be analyzed due to the fact that the PPG signal of the existing wearable device is not obvious in a moving state is solved.

Description

technical field [0001] The invention relates to the field of digital signal processing, in particular to a PPG signal quality evaluation method, device, wearable device and storage medium. Background technique [0002] Photoplethysmography (PPG) is a non-invasive detection method for detecting blood volume changes in living tissue by photoelectric means, which can be used to estimate blood oxygen saturation (SPO2), heart rate, blood pressure, etc., and the PPG measurement equipment is small , easy to carry, widely used, but the PPG signal has the interference of motion artifacts, the PPG signal with serious interference will mislead or make it unable to run the detection algorithms such as blood oxygen\heart rate\blood pressure, so the quality of the PPG signal is to ensure the blood oxygen\ The prerequisite for effective detection of algorithms such as heart rate\blood pressure. [0003] The existing PPG signal quality detection methods mostly analyze the signal quality th...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to propose a PPG signal quality evaluation method, device, wearable device and storage medium, aiming to improve the problem that the existing PPG signal cannot be evaluated in the event of signal quality

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