Study on the extract method of time domain characteristic parameters of pluse wave

PhotoPlethysmoGraphy(PPG) is a more important method in the current study of blood pressure measurement. And when PPG is used to measure the blood pressure, denoising and feature extraction are the two most important steps, which directly affects the results of the blood pressure measurement. Therefore, how to get more accurate denoise waveform and characteristic parameters is the key point of the current research. This paper designs a real-time, high compatibility and adaptive method to identify the characteristics of pulse wave in time domain based on the extremum method as well as the threshold method, and experiments are used to prove that this method has a certain maneuverability and accuracy.