基于STC89C51单片机的脉搏测量仪设计

脉搏测量仪在日常生活中有着非常广泛的使用。本设计基于STC89C51单片机,采用光电式传感器获取脉搏信号,进行信号的放大、滤波、整形获得易于单片机计数的脉冲信号;通过单片机进行计数并同步计时的编程控制,获得适合的脉搏测量范围、利用脉搏边沿计数、定时测量,提高精度;测量时间可控,并可测量2 min强制停止,脉搏测量范围0.7~255次/min,便捷可靠;系统结构简单,性价比高。

Pulse measuring instrument is widely used in our daily life.This design is based on the STC89C51 single chip microcomputer,uses the photoelectric sensor to obtain the pulse signal,amplifies,filters and shapes the signal to obtain the pulse signal which is easy to be counted by the single chip microcomputer,and through the programming control of counting and synchronous timing by the single chip microcomputer,the suitable pulse measurement range is obtained,and the pulse edge counting and timing measurement are used to improve the accuracy.The measuring time can be controlled,and it can be forced to stop for 2 minutes,and the pulse measurement range is 0.7~255 times per minute,which is convenient and reliable;the system has simple structure and high performance-to-price ratio.