A novel approach for extracting pulse rate,respiratory rate and heart rate from photoplethysmogram  

从光电容积图中提取脉搏率、呼吸率和心率的新方法

作　　者：WANG Huimin YANG Lu LIANG Xingyu 王慧敏;杨录;梁星雨(中北大学信息与通信工程学院,山西太原030051;中北大学电子测试技术重点实验室,山西太原030051)

机构地区：[1]School of Information and Communication Engineering, North University of China, Taiyuan 030051, China [2]Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China

出　　处：《Journal of Measurement Science and Instrumentation》2021年第2期188-194,共7页测试科学与仪器（英文版）

摘　　要：Photoplethysmogram(PPG)is a noninvasive method for detecting human cardiovascular pulse wave using optical technology.The PPG containing a lot of physiological information is from the MIMIC database.This paper proposes a combinatorial method of ensemble empirical mode decomposition(EEMD),cepstrum,fast Fourier transform(FFT)and zero-crossing detection to improve the robustness of the estimation of pulse rate(PR),heart rate(HR)and respiratory rate(RR)from the PPG.First,the PPG signal was decomposed into finite intrinsic mode functions(IMF)by EEMD.Because of its adaptive filtering property,the different signals were reconstructed using different IMFs when estimating different physiological parameters.Second,the PR was obtained by zero-crossing detection after rejecting low frequency IMFs containing artifacts.Third,IMFs with frequency between 1.00 Hz to 1.67 Hz(60 beats/min to 100 beats/min)were selected for estimating HR.Then,the frequency band that reflects the heart activity was analyzed by the cepstrum method.Finally,the respiratory signal can be extracted from PPG signal by IMFs with frequency between 0.05 Hz to 0.75 Hz(3 breahts/min to 45 breaths/min).Then the spectrum of signal was obtained by FFT analysis and the RR was estimated by detecting the maximum frequency peak.The algorithm has been tested on MIMIC database obtained from 53 adults.The experiment results show that the physiological parameters extracted by this integrated signal processing method are consistent with the real physiological parameters.And the computation load of this method is small and the precision is high(not larger than 1.17%in error).

关 键 词：photoplethysmogram(PPG) pulse rate(PR) respiratory rate(RR) heart rate(HR) CEPSTRUM 

分 类 号：R318[医药卫生—生物医学工程] TP391.41[医药卫生—基础医学]