目录摘要..................................................................3英文摘要..............................................................31引言...............................................................41.1心率计的研究背景和意义............................................41.2心率计的研究现状及发展动态........................................42方案论证及元器件选择................................................52.1研究内容及设计指标................................................52.2方案设计与论证....................................................52.2.1传感器的选择与论证..............................................52.2.2信号处理方案选择和论证..........................................72.2.3单片机系统选择和论证............................................82.2.4显示模块选择和论证..............................................92.3元器件选择及其功能介绍.............................................92.3.1单片机AT89S52...................................................92.3.2红外传感器......................................................112.3.3双运算放大器LM358N.............................................112.3.4LCD12864.......................................................123硬件系统设计.......................................................133.1系统设计框图.....................................................133.2信号采集电路.....................................................143.3信号放大电路.....................................................153.3.1一级信号放大电路................................................153.3.2电源模块设计...................................................163.4信号比较电路.....................................................173.5LCD显示电路.....................................................183.6记忆电路.........................................................183.7键盘电路.........................................................194软件设计...........................................................194.1测量计算原理.....................................................204.2主程序流程图.....................................................204.3中断程序流程图...................................................214.4定时器T0，T1的中断服务程序......................................215系统测试与结果分析.................................................225.1测试方法和仪器...................................................225.2仿真与焊接阶段...................................................235.2.1仿真阶段.......................................................235.2.2焊接与完成阶段.................................................235.3测试数据与结果分析...............................................255.3.1测量结果与分析..................................................255.3.2几种主要系统干扰和影响..........................................27结束语...............................................................28参考文献.............................................................29附录一：心率计电路图附录二：部分程序1基于单片机的心率计设计基于单片机的心率计设计摘要：在社会飞速发展的今天，人们的物质文化生活得到了极大的提高，但同时多种疾病威胁着人们的生命；而心脏病又是人们难以预防的突发致命疾病，所以健康也被越来越多的人所重视。本设计要解决的问题就是可以测量心率、预防心脏病等心脏方面疾病的数字心率计。便携式数字人体心率计运用AT89S52单片机作为核心控制处理单元...
