光电脉搏血氧心率仪电路设计.pdf

33 6 Vol. 33 No. 6 2010 12 Ch inese Journalof E lectron D evices Dec. 2010 Circuit Design of Photoelectric Pulse Oximeter * ZH EN G W an ting, CH EN F uy i (D ep artm en t of B iom ed ica l E ng in eer ing, W enz hou M ed ical Co lleg e, W enz hou Zh e iang 32 03 , Ch ina ) Abstract: Based on the use of silicon photovoltaic cells to detect oxygen saturation of the technology, the princip le of pu lse oxmi ete is presented and a test tomonitor heart rate and blood oxygen heart rate optical pulse oxygen meter w as designed. The system adoptsMCU STC89C 8RD + as the core, w ith three circu its of mi p luse control circuit, the signal acqu isition circu it, signal processing circu it for testing the blood oxygen and heart rate at the same tmi e, and the testing resu ltsw ill be d isplayed by LCD. For actual persons testing, the blood oxygen is from 93 to 98 and the heart rate is from 70 to 7 , and itmeets the actual testing requirement. The system has advantages of low cost, reasonable structure, smi ple, safe and reliable. K ey words: oxygen saturation; pulse oxygen measuring principle; silicon photovoltaic cells; MCU STC89C 8RD+ EEACC: 751 D doi: 1 . 3969/ j. issn. 1 5- 949 . 2 1 . 6. 31 郑万挺, 陈付毅* (, 32 03 ) : , , STC89C 8RD+ , , , LCD, 93~ 98 70~ 7 , : ; ; ; STC89C 8RD+ : RH333. 1 : A : 1 5- 949 ( 2 1 ) 6- 786- 4 , , , 1. 1 [ 1] , , , 660 nm 940 nm , , , [ 2- 3] , , 74LS0