目录1引言.......................................................................................................................................................11.1脉搏的研究背景...............................................................................................11.2选题意义...........................................................................................................12系统设计方案...........................................................................................................................12.1实现的要求和功能...........................................................................................12.2采集主控芯片方案..........................................................................................22.3脉搏传感器的选择...........................................................................................22.4上位机实现方案...............................................................................................43硬件电路设计...........................................................................................................................43.1系统总框架.....................................................................................................43.2单片机模块.......................................................................................................5..........................................................................................................................................53.2.2单片机最小系统模块....................................................................................6..........................................................................................................................................6..........................................................................................................................................73.3脉搏信号的采集...........................................................................................................73.4脉搏信号的处理...............................................................................................8..........................................................................................................................................83.4.2电压比较器......................................................................................................93.4.3运算放大器LM358........................................................................................103.5液晶显示模块.................................................................................................113.6USB串口通信模块.........................................................................................114系统软件设计.........................................................................................................................12...............................................................................................................................124.2主程序流程介绍.............................................................................................12...............................................................................................................................134.4ADC采用程序流程介绍................................................................................144.5LabVIEW上位机程序设...
