摘要
针对目前光电模式心率计实时显示慢、耗能高等缺点,设计一款实时、节能、便携、低成本心率计。该设计以单片机Mbed作为核心处理器,充分利用Mbed自带方程进行实时控制和调度;以PMOS三极管为控制器,开闭LED灯,实现节能功能;通过光敏传感器将心率信号等效为电信号,并对信号进行过滤和放大,将人体脉搏转化为数字信号,最后将波形和心率实时显示在8×8数码管上。从实验结果看,该设计可以实时刷新心率,每一次心跳都可以测得相对应心率值,同时可以实时显示波形,节能大约50%,具有一定的推广价值。
Aiming at improving the drawbacks of the photoelectric mode cardiotachometer,wasting energy and slowly refreshing results,the essay is trying to design a cardiotachometer with characteristics that are currently showing,portable,low cost and saving energy.The design adopts the Mbed as core microprocessor,making full use of the buildin function in Mbed to control and dispatch.And with the help of the audion PMOS as controller to switch on and off the LED,the function of saving energy is achieved.The whole process of the cardiotachometer is that the pulse signal could be equivalent to the electronic signal through the photoelectric sensor.After that,the signal is filtered and amplified.Eventually,the electronic signal is a shape like the pulse.From the result of the experiment,the design could refresh the result with the same ratio of the heartbeat,displaying the waveform of it at the same time and saving about 50% energy overall,which has the value to promote.
作者
郭宇翔
朱宸晖
Guo Yuxiang;Zhu Chenhui(UoG UESTC Joint School,University of Electronic Science and technology of China,Chengdu 611731,China)
出处
《电子测量技术》
2018年第13期134-138,共5页
Electronic Measurement Technology
关键词
心率计
光电传感器
Mbed
节能
eardiotachometer
photoelectric sensor
Mbed
energy saving
