光电容积脉搏波信号关键算法研究  

Research on key algorithms for pulse wave signal of photo plethysmography

作　　者：牛磊 艾海明[2] 刘登辉 张松[3] NIU Lei;AI Hai-ming;LIU Deng-hui(Beijing Ditan Hospital,Capital Medical University,Beijing 100015,China;不详)

机构地区：[1]首都医科大学附属北京地坛医院医学工程处,北京100015 [2]北京开放大学科学技术学院,北京100081 [3]北京工业大学环境与生命学部,北京100124

出　　处：《中国医学装备》2023年第4期1-5,共5页China Medical Equipment

基　　金：科技部国家重点研发计划(2019YFC0119700)“腹电式动态胎儿监护仪”;北京市教委科技项目(KM201951160001)“基于容积脉搏波信号的智能心血管检测系统研究”。

摘　　要：目的:构建光电容积脉搏波信号处理关键算法,以提升光电容积脉搏波技术临床应用效能。方法:根据信号采集特征及采集部位不同,采用小波变换除噪算法、五点差分阈值算法、去基线归一化算法、高斯拟合算法和传递模型算法,在个人电脑(PC)端到手机Android端的跨平台和Matlab语言到Java语言的跨语言编程中,实现高斯拟合算法和传递模型算法。结果:除噪算法中的db9小波函数除噪中噪声集中于第1层高频段,运动伪迹分布在第8层低频段;五点差分阈值算法能够准确识别出波峰点;去基线归一化算法能够有效抑制低频干扰并统一信号幅值;高斯拟合算法和传递模型算法在跨平台跨语言编程实现了性能一致。结论:构建的光电容积脉搏波信号处理关键算法可为容积脉搏波技术用于生物医学工程及临床实践提供参考和借鉴,具有重要的临床应用价值。Objective:To construct a key algorithms of the signal processing of the photo plethysmography(PPG),so as to improve the clinical application efficiency of the PPG technique.Methods:In view of the different characteristics and positions of signal acquisition,the wavelet transform de-noising algorithm,five-point differential threshold value algorithm,de-baseline normalization algorithm,Gaussian fitting algorithm and delivery model algorithm were adopted.The Gaussian fitting algorithm and delivery model algorithm were realized in the cross-platform[from personal computer(PC)to Android]programming and cross-language(from Matlab to Java)programming.Results:The noise concentrated in the high frequency band of the first layer in the de-noise with db9 wavelet function of de-noising algorithm.The motion artifact distributed in the low frequency band of the eighth layer.The five-point differential threshold value algorithm can accurately identify the point of wave peak.The de-baseline normalization algorithm can effectively suppress interference of low-frequency and unify signal amplitude.Gaussian fitting algorithm and delivery model algorithm have realized the consistency of performance in cross-platform programming and cross-language programming.Conclusion:The constructed key algorithm of PPG signal processing can provide references for the application of PPG technique in medical engineering and clinical practice,which has important clinical application value.

关 键 词：光电容积描记(PPG)脉搏波 关键算法 桡动脉 高斯拟合 传递模型 

分 类 号：R318.04[医药卫生—生物医学工程]