这是一个基于单片机的项目，用来测量汽车是否超速，超速则报警。程序很完整，可以下载到单片机直接使用，不过需要自己买硬件比如红外对管。我们的测速原理是距离除以时间，具体原理再文档中说明的很详细。-This is a project based on the microcontroller, used to measure whether the car speeding, speeding alarm. The program is complete, you can download directly to the use of single-chip, but need to buy their own hardware, such as infrared on the tube. Our speed principle is the distance divided by the time, the specific principles of the document described in detail.