【摘要】 设计了一个简易多功能计数器,由89C52单片机控制,配合相应的测量电路以及相应的软件,实现对频率、周期和时间间隔、被测信号峰值、温度等的测量,可记录10个历史数据,且具有掉电保持功能。其主要电路包括电平电路、时基电路、测频电路、测周电路、测温电路、键盘输入电路、显示电路等,信号输入后先自动判断频率的范围,然后选择需要的测量电路。通过单片机对数据进行处理,在误差允许的范围内显示各个测量值。更多还原

【Abstract】 This simple multi-purpose counter by the 89C52 monolithic integrated circuit control,coordinates the c orresponding metering circuit,as well as the corresponding software,realizes to measure the frequency,the cycle,the time-gap,the measured signal peak value,the temperature and so on. It can record 10 historical data and has the electricity maintenance function. After the signal sends in,it firstly automatic judges the frequency scope,then choices the metering circuit. Carries on processing through the monolithic integrated circuit to the data,it demonstrates each observed value in permissive error scope.更多还原