摘要
文章的设计基于光电脉搏检测原理,采用MSP430 Launchpad单片机板作为核心控制器,实现了自启动测量、自动待机、数据回放及输出超限报警等功能。设计中使用特征波长的红外管发射红外光,红外光穿透手指血液容量后,会产生周期变化的光谱能量,再由对应特征的光敏三极管输出光信号,后经放大、滤波、整形等处理后,经MSP430内置AD采样获取反应脉搏变化的电信号。最后,利用128×64点阵型LCD,获得可以实时显示的脉搏率及相应的动态波形。
This design is based on the principle of photoelectric pulse detection, using Launchpad MSP430 microcontroller board as the core controller, and realizes the function of self starting measurement, automatic standby, data playback and pulse alarm.Infrared LED can emit infiared light, and the change of the infrared transmittance can reflect the cyclic variation of the finger blood volume. After filtering, amplification and other processing, optical signal received by the phototransistor obtains pulse signal by means of single chip A/D sampling of the microcontroller. The tester uses 128 ＇ 64 dot array LCD to display the pulse number per minute and photoelectric pulse signal wave tbrm dynamic graph real-time. Key words： photoelectric pulse measurement, data playback; LCD display; MSP430 mierocontroller
出处
《无线互联科技》
2015年第19期79-81,共3页
Wireless Internet Technology
