目 录摘 要..........................................................................3第一章 绪论....................................................................41.1 心率测试的意义..............................................................41.2 心率测试仪的组成框图........................................................41.3 心率测试的基本过程..........................................................5第二章 基础知识介绍.......................................................62.1PVdF 传感器............................................................62.1.1敏感部分..........................................................62.1.2电荷放大器........................................................72.2555定时器.............................................................72.2.1 555定时器的基本功能.............................................72.2.2 555 组成的基本电路与应用........................................92.3 十进制加法计数器 74160.................................................102.4 锁存器 74LS373.........................................................102.5 显示译码器 74LS48......................................................112.5.1 译码驱动器.......................................................112.5.2 发光二极管显示器.................................................132.6 数值比较器 74LS85.......................................................132.6.1 74LS85 的逻辑功能图和引脚图......................................132.6.2 74LS85 实现的逻辑功能............................................14第三章 电路设计.............................................................153.1 传感器模块.............................................................153.1.1 传感器的选择......................................................153.2 放大模块................................................................153.2.1 放大电路.........................................................153.3 整形模块..........................................................
