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汽车算得上人类最伟大的发明之一,它的出现大幅扩大了了人们日常生活的活动范围,为我们带来了许多便利。但是现今私家车的泛滥导致了严重的交通问题,不仅仅是道路堵塞,更严重的问题是各种可怕的交通事故,数据显示,我国2016年共发生交通事故5.04万起,造成2.5万人死亡,4.68万人受伤。因此本文介绍的是十字路口信号灯自适应系统(以下简称自适应系统),该系统能够有效缓解交通堵塞问题,并在一定程度上对预防交通事故起到积极作用。本文是基于AT89C52单片机设计的自适应系统的理论模型,包括红黄绿信号灯,信号灯计时,行人语音提示,车流量检测四个功能模块。信号灯共有20个,计时器为4个2位七段数码管,行人语音提示器四个,车流量监测传感器4个。信号灯与计时器和普通交通路口红绿灯以及倒计时相同,行人语音提示在行人红绿灯变灯时发送语音提示,车流量检测器实为超声波检测器。
A car counts as one of the greatest inventions of mankind. Its appearance has greatly expanded the range of people’s activities in daily life and brought us many conveniences. However, the proliferation of private cars has led to serious traffic problems. Not only the roads are blocked, but the more serious problem is all kinds of terrible traffic accidents. According to statistics, there were 50,400 traffic accidents in 2016 in our country, killing 25,000 people , 46,800 people were injured. Therefore, this article describes the crossroads signal adaptive system (hereinafter referred to as adaptive system), the system can effectively alleviate traffic congestion problems, and to some extent, to prevent traffic accidents play a positive role. This article is based on AT89C52 microcontroller design adaptive system theory model, including the red, yellow and green signal lights, signal timing, pedestrian voice prompts, traffic flow detection of four functional modules. A total of 20 lights, the timer for the four two seven-segment digital tube, four pedestrian voice prompts, traffic flow sensor 4. Traffic lights and timers and traffic lights at ordinary junctions and the same countdown, pedestrian voice prompts pedestrian traffic lights turn lights to send voice prompts, the traffic detector is actually an ultrasonic detector.