基于光电技术的心率测量仪

摘要

Considering need for heart-rate measuring device with low-cost and high-precision, the micro photoelectronic measuring instrument with digital display is designed. This heart-rate meter dependent diode emits infrared light, and the change of its transmittance can reflect the cyclical change of blood volume inside finger, then reception diode receives the modulated optical signal. This signal which is filtered and amplified is delivered directly to the MCU(80C51F310) to be processed, and the current heart rate is shown by three LEDs. The system is convenient, intuitive display, low power consumption advantages.%考虑到人们对低成本、高精度心率测量仪的需要,设计了微型化数字显示光电测量仪.该心率计依赖二极管发射红外光,红外光透过率的改变可反映手指内血容量的周期性变化,接收二极管接收到受调制的光信号；该信号经滤波放大后直接送给80C51F310单片机进行处理,并用3个LED数码管显示出实时的心率.该系统具有方便、显示直观、功耗低等优点.