车距语言提示器设计毕设.doc

 PAGE \* MERGEFORMAT  河南理工大学毕业设计（论文）说明书  PAGE XLVIII 摘 要 随着汽车的日益普及，停车场越来越拥挤，由于这些低速行驶的车辆与其它车辆非常接近，而且驾驶员的视野也颇受限制，碰撞事故时有发生，在夜间时则更显突出。而本设计进行的汽车车距语言提示器设计可以在驾驶员对车尾与障碍物体的距离远近无法目测和判断时，利用单片机的实时控制和数据处理功能测量并显示汽车与障碍物之间的距离，并在不同距离范围利用语音芯片实现语音提示车距报警。将车辆行驶中被动防撞向主动预防的方向发展，体现了“以人为本”的驾驶理念。 本设计采用超声波检测的方法实现对障碍物的识别。整个电路采用模块化设计，主要将单片机控制模块、超声波测距模块、语音提示模块、4位数码管显示模块这几个模块结合起来，采用以AT89S52单片机为核心的低成本、高精度、微型化数字显示车距语言提示器的硬件电路和软件设计方法。系统由主程序、中断子程序、测距及显示子程序、语音播报子程序等模块组成。各探头的信号经单片机综合分析处理，实现车距语言提示器的各种功能。相关部分附有硬件电路图、程序流程图。本设计采用国内生产厂家的通用元件，成本低，性能可靠，有利于推广。 关键词：超声波传感器； AT89S52； DS18B20温度补偿； LED显示 河南理工大学毕业设计（论文）说明书  PAGE II  PAGE XLVIII Abstract With the increasing popularity of the automobile, car parking is becoming more and more crowded, as a result of these low speed vehicles are very close to each other, and the drivers visual field is restricted, collision accidents, especially at night.The design of the car is designed to be language prompting device driver on the rear of the vehicle and the obstacle distance to visual inspection and judgement, the use of single chip real time control and data processing function to measure and display the distance between the car and the obstacle, and in different distance range using a voice chip voice prompt distance alarm.The vehicle driving in the passive to active prevention for the direction of development, reflects the people-oriented idea of driving. This design uses the ultrasonic detection method for obstacle recognition.The circuit adopts the modular design, the MCU control module, ultrasonic ranging module, a voice prompt module, 4 digital tube display module of the module combination, using AT89S52 microcontroller as the core to the low cost, high precision, miniaturization digital display distance language prompting device the hardware circuit and software design method.The system consists of main program, interrupt subroutine, ranging and display subroutine subroutine modules, voice broadcast.The probe signal by single chip integrate