数字化人体心率检测仪的设计DesignofDigitizingHeart-rate.PDF

24 3 () Vol. 24 No. 3 2010 9 Journal ofUn iversit of South China( Science and T echnolog ) Sep. 20 10 : 1673- 0062( 20 10) 03- 0022- 05 数字化人体心率检测仪的设计 颜拥军, 赖 伟, 杨 彬 ( , 42 100 1) : 文章介绍了一种基于人体脉搏信号特征的数字化人体模型心 检测仪的设 计. 该仪器采用反射式红外传感器获取脉搏信号, 以 uPSD3234单片机为主控芯片, 对红外信号进行 A /D转换, 采样数据经低通滤波, 数字微分后, 选择适于脉搏微分波 形的模板进行匹配滤波处理, 实现了对脉搏波的检测, 并使用了一种中值算法来提取 有效的脉搏时间间隔, 从而获得精确的心 值. 实验表明: 检测仪的设计和数据处理 方法是可行的. : 光电式脉搏传感器; uPSD3234; 匹配滤波; 中值算法 : TP274 : B Design ofDigitizing Heart- rateDetecting Instrument YAN Yong- jun, LAIW e,i YANG Bin ( School of Nuclear Science and Technolog , U niversit of South Ch ina, H eng ang, H unan 421001, China ) Abstract: Th is paper introduces the design of a digitizing heart- rate m easuring instru- ment based on the character of the pulse signal of human bod . In this instrum ent, the re- flectance IR sensor is applied to collect the pulse signals; uPSD3234 is used as central control un it, and converts the infrared signals from analog to digita.l A fter low - pass filter and d igital d ifferentiation, the temp late adapted to the differential pulse waveform is ap- p lied for thematched filter, thus the pu lse signal is detected. And then amed ian algorithm is used to extract the valid heart beat intervals. Thereb , an accurate beat rate is found. The expermi en t show s that themethod of data processing is effective and the s stem is feasible. Key wor s: the photoelectric sensor for collection pulse; uPSD3234; matched filter; m edi- an algorithm . . . ,