精品文档---下载后可任意编辑摘 要采纳超声波测距原理，驾驶者在倒车时，将汽车的挡位推到 R 挡，启动倒车雷达，在控制器的控制下，由装置于车尾保险扛上的探头发送超声波，遇到障碍物，产生回波信号，传感器接收到回波信号后经控制器进行数据处理，从精品文档---下载后可任意编辑而计算出车体与障碍物之间的距离，推断出障碍物的位置，再由 LED 显示器和蜂鸣器声发出警示信号，从而使驾驶者倒车时不至于撞上障碍物。整个过程，驾驶者无须回头便可知车后的情况，使停车和倒车更容易，更平安。本文在查阅、分析国内外倒车雷达系统相关技术的根底上，结合最新讨论成果，对基于超声波测距的倒车雷达预警系统的研制进行了深化探讨和讨论。该系统分为测距模块、系统控制模块和显示报警模块，并分别对其进行方案分析，构建了倒车雷达预警系统的系统构架和设计方案；在硬件电路中，详细阐述了运用单片机技术实现的可视倒车雷达预警系统的测距实现原理，分析了以AT89S52 单片机为主控单元的系统硬件设计，并通过系统仿真讨论，验证了系统的可靠性和可行性。关键字：超声波；倒车雷达；传感器；AT89S52 单片机ABSTRACTThe ultrasonic distance principle, drivers in reverse, the gears to push the car back and start against R radar, under the control of the controller, the device to carry on the rear insurance send ultrasonic probe, obstacle, sensor, echo signal after receiving echo signal controller, which calculated data processing, the distance between the body and the obstacles and obstacles, then LED by a warning signal and noise, thus make the drivers reverse not mask obstacles. The whole process, without turning and car drivers that after, parking and reverse easier, more safety.精品文档---下载后可任意编辑Based on the analysis of domestic consulting, reverse radar system on the basis of relevant technology, combining the latest research results of the based onultrasonic ranging back-draft radar warning system is discussed and studied. This system is divided into rangefinder module, the system control module and d...
