自动化-基于stc89c52单片机的超声波倒车雷达设计毕设论文.doc

超声波倒车雷达的硬件设计 摘 要 超声波倒车雷达采用超声波测距原理，驾驶者在倒车时，将汽车的挡位推到倒车挡，便启动倒车雷达，在控制器控制下，由装置在车尾保险扛上的探头发出超声波，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，然后计算出车体与障碍物之间的距离，判断出障碍物的位置，再由LED显示器显示数据和蜂鸣器声发出警示信号，从而使驾驶者倒车时不至于撞到障碍物。整个过程，驾驶员无须回头便可知车后的情况，使停车和倒车更容易，更安全。 本文在查阅、分析国内外倒车雷达系统有关技术的基础上，结合必威体育精装版研究成果，对基于超声波测距的倒车雷达预警系统的研制进行了深入的探讨和研究。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STC89C52单片机为主控单元的系统硬件设计，并通过系统仿真研究，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,STC89C52单片机 The hardware design of automobile reversing radar system based on ultrasound distance measurement ABSTRACT The ultrasonic distance principle, drivers in reverse, the gears to push the car back and start against Reverse gear 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. 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 display alarming module, and carries on the analysis, to construct the backing of the early-warning radar system architecture and design scheme, In the hardware circuit, this paper expounds the application of visualization technology realization of location back-draft radar warning system, and analyzes the realization principle for the control unit of STC89C52 system hardware and software design, and through the system simulation verified the feasibility and reliability of the system. Key words: ultrasonic