Wrist type real-time dynamic heart rate measuring method based on PPG

Abstract

The invention relates to the field of heart rate measurement, in particular to a wrist type real-time dynamic heart rate measuring method based on PPG. A transmitter control module, a receiver module, a band-pass filtering module, a signal analysis module and a frequency spectrum selection module are adopted in the method, and a final precise heart rate spectral line is obtained after a heart rate signal is sequentially processed by the modules. With the adoption of the method, no additional noise reference source is required, the operation mount is small, the operation speed is high, and the heart rate signal can be extracted more accurately and quickly under the condition that a human body keeps movement and even intense movement.

Description

technical field [0001] The invention relates to the field of heart rate measurement, in particular to a PPG-based wrist-type dynamic heart rate real-time measurement method. Background technique [0002] PPG (photoplethysmography) technology for the detection of human heart rate is an application of optical nondestructive testing technology in biomedicine. It uses photoelectric sensors to detect the difference in the intensity of reflected light absorbed by human blood and tissue, and trace the volume of blood vessels. The heart rate is calculated from the resulting pulse waveform during the cardiac cycle. [0003] The PPG signal is a signal that is easily disturbed by motion, and the greater the motion, the stronger the interference. Because most of the interference noise occurs in the same frequency range as the useful signal, it is difficult to extract the heart rate signal by ordinary filtering methods. [0004] At present, there have been a large number of researches ...

AI Technical Summary

Problems solved by technology

Since most of the interference noise occurs in the same frequency range as the useful signal, it is difficult to extract the heart rate signal by ordinary filtering methods

[0004] At present, there have been a large number of researches on the method of using PPG to measure the heart rate of the human body during exercise, but generally speaking, there is no feasible method that can be effective and run in real time in the single-chip microcomputer system with low computing power and limited computing speed.

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