摘要现阶段，随着我国市场经济体制不断成熟，计划经济逐渐退出历史舞台，我国经济获得前所未有的发展良机，我国人民生活水平水涨船高，汽车成了很多家庭生活的必需品。车辆数据的急剧上升导致交通越来越拥堵，而汽车在倒车过程中引起的汽车损伤和人员受伤的事件也逐渐增多，事故的发生使人们的生命财产安全受到严重的威胁。为了保证汽车安全可靠的行驶，在汽车中增加倒车雷达语言系统，能够有效的测试车辆之间的距离，所以的测距方法是超声波测距。本文在研究时，设计的倒车语音防撞系统便是基于超声波测距法研制的。在系统的电路方面，一共设计了三种功能，具体为：将倒车距离和环境温度显示出来、通过语音来提示倒车距离、手动的来开启或关闭语言提示。在语言提示模块使用的是ISD4004语言芯片，在显示部分选用的是LCD1602，同时还增加了显示温度的功能。该倒车防撞系统的核心部分是型号为AT89C52的单片机、外部电路以及LCD显示，利用超声波传感器测量距离，并将数值具体显示出来。为了让使用者能够实时了解周围的温度，在系统中加入了温度显示功能。77657

该论文有图16幅，表3个，参考文献8篇。

关键词：单片机AT89C52  ISD4004  测距  语音  温度

Design of Reversing Collision Avoidance System Based on MCU 

Abstract

At this stage, along with the maturation of China's market economic system, planned economy gradually withdraw from the stage of history, our country economy to obtain an unprecedented development opportunity, our people's living standards rising, car has become a lot of family life necessities。Vehicle data of rapid increases in increasing traffic congestion, and cars in the reversing process caused by vehicle damage and personal injury case also gradually increased, the accidents occur to people's life and property safety is a serious threat。 In order to ensure the safety and reliability of the automobile driving, in the car to increase the car reversing radar language system, can effectively test the distance between vehicles, so the distance measurement method is ultrasonic ranging。 In this paper, the design of the reverse voice collision avoidance system is based on ultrasonic distance measurement method。 In the circuit of the system, a total of three kinds of functions, specifically: the reverse distance and the ambient temperature is displayed, the voice to indicate the distance, manual to open or close the language tips。 In the language prompt module uses the ISD4004 language chip, in the display part of the selection is LCD1602, at the same time also increased the display temperature function。 The core of the reverse collision avoidance system is the model for the AT89C52 microcontroller, the external circuit and LCD display, the use of ultrasonic sensors to measure the distance, and the specific display。 In order to allow users to understand the ambient temperature in real time, the temperature display function is added in the system。

This paper has 16 figures, 3 tables, 8 references。

Key Words: AT89C52  ISD4004   ranging  voice   temperature

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