Method and device for generating photoplethysmography signal

Abstract

The embodiment of the invention relates to a method and device for generating a photoplethysmography signal. The method comprises the following steps: according to a preset red light pixel threshold range, sequentially carrying out single-frame red and green channel data calculation on all skin surface video data frame images of a skin surface video data frame image sequence to generate first redand green light digital signals; carrying out signal band-pass filtering on the first red and green light digital signals to generate second red and green light digital signals; acquiring a signal judgment identifier; judging whether to carry out signal maximum frequency difference judgment processing on the second red light digital signal and the second green light digital signal according to thesignal judgment identifier and generating a first judgment result; when the first judgment result is an up-to-standard signal identifier, performing signal-to-noise ratio judgment on the second red and / or green light digital signals to generate a second judgment result; and generating a PPG signal when the second judgment result is an up-to-standard signal identifier.

Description

technical field [0001] The invention relates to the technical field of electrophysiological signal processing, in particular to a method and device for generating a photoplethysmography signal. Background technique [0002] Factors such as the current health status, hormone level, emotional state and even lifestyle of the human body will affect the working status of the heart. Conversely, by analyzing the trajectory of the heart movement, the health and disease status information of the human body can also be learned in reverse. To obtain the trajectory data of the heart movement, it is necessary to monitor and collect the data of the heart movement, which is traditionally accomplished by using an electrocardiogram (ECG) monitoring technology. This method needs to connect the lead electrodes to multiple parts of the body to collect ECG signals. During the specific operation, the monitored object needs to lie still or wear a variety of contact devices (heart stickers, heart b...

AI Technical Summary

Problems solved by technology

However, in practical applications, we found that the current PPG signal acquisition devices and methods are relatively rigid: the irradiation light source only uses a single red light or infrared light, and the most common front-end acquisition refers to customized mechanical equipment such as clips and ear clips. , the collected data needs to be analyzed by specific sensors, etc., and such problems have increased the difficulty of obtaining PPG signal data for upper-level medical applications

Images