文档介绍：摘要摘要激光测速技术是目前交通管理方露研究的热点闼题,随着汽车的普及率越来越高,我们需要一种更有效的管理与检测手段,它是从六十年代中期发展起来的, 利用激光的单***和能量聚集的特点用测频的方法直接测物体的速度。比起老式的雷达测速仪,最新的激光测速仪的性能有了明驻的提高。激光测速仪不仅具有更大的有效:I==作范围,而且它利用点射技术,能够在拥挤的车流之中固定跟踪某一个目标,精确率更高。激光测速主要是加强对超速车辆的监控,尤其是加强对高速公路超速行驶车辆的监控,及时纠正和杰处超速驾驶的违法行为,预防和减少道路交通事故的发生。本文主要研究工作是激光测速系统中的硬件电路设计,其中包括发射模块、脉冲驱动电路、接收模块、计算机接口期上位机控制软件五个部分。文中对测速系统硬件电路中各部分功能进行了详细的叙述,并说明了它们在该硬件电路中的工作原理和性能参数。硬件电路设计采用了CPLD技术,将一些数字电路环节集成在CPLD芯片中,为系统的小型化、稳定性、抗干扰性、在线修改和升级创造了条件。在整个测速系统中,信号经过整形滤波、在CPLD中计算分析,最终经过串口传送到计算机中进行数据的显示、分析以及处理等工作。本研究最终完成了激光测速系统的硬件电路设计与电路调试,满足系统必须具备的所有硬件指标。关键词:激光测速驱动电路CPLD串口通信 Abstract Abstract Laser velocimeter system hasbeen ahotdiscussed cats hasbeen more andmore popular,we need amore efficientmethod tocontrol or tO manage the traffic situation+It takes the advantage of lasert’Scharacteristics of monochromaticity andconcentrating ofenergy,by measuring thefrequency todirectly measure thespeed pared with tranditional radar velocimeter,the latest laser velocimeter has great improvement ,laser velocimeter not only hastheadvantage oflarger effective working area,but alsohasthe capability to use thetechnology ofpointing emission tokeep tracking of acertainobject incorwded heavy trafficwith higher precision. Thus,the main goal oflaser velocimeter istoenforce thescrutiny ofoverspeed vehicle,Especially toreinforce thescrutiny ofspeeding vehicle on freeway,and to correct and deal with overspeed driving intime,SO as to prevent and reduce the incidence oftaffic accident. This paper introduces mainly thecircuitdesign oftheLaser velocimeter system, {nclude emission module,pulse drive circuit,receiver puter interface and controlling isdetailedly introduced thefunction,the operational principle as well as theperformance parameters of each portion technology is employed tointegrate digital circuit inCPLD chip。which isofgreat usage￡o the miniaturization,stability,noise immunity and on—linemodification and upgrade ofthe