摘要
由于图像型电子警察从前端感应设备检测到违章机动车,再到启动抓拍设备整个过程是有延时的,针对该抓拍延时的测量问题,设计一种以AT89S51单片机作为控制器的测量装置,应用数码管实现毫秒级计时显示。测量时,检测装置发出触发信号,单片机控制数码管计时,同时计算机读取触发信号并启动电子警察抓拍数码管图像,然后从抓拍的图像中读取准确的延时时间。
In the image electronic police system, there is a delay between the front sensors have detected the vehicles peccaney and starting to take a snapshot.Aiming at this snapshot delay,the measurement equipment which used AT89S51 microcontroller as MCU is designed ,seven segments LED can display time on the order of millisecond.If the sensor sends a trigger signal, the MCU will controll LED work,At the same time, the PC receives the signal and controls the camera to take a snapshot of the LED. The delay time could finally be read out form the images.
出处
《电子设计工程》
2009年第1期44-45,48,共3页
Electronic Design Engineering
