通过设计转速测量系统，熟悉AVR单片机的使用和利用ICC软件编程，设计出一种具有一定实用价值的转速测量系统，并用于行程测量和超速报警等仪器。-Speed through the design of measurement systems, familiar with the use of AVR microcontroller programming software and the use of ICC, the design of a certain practical value of t