基于信号校验技术的单片机交通灯控制终端

Traffic lights control terminal with single-chip microcomputer based on the technology of signal validation

根据区域协调型智能交通系统的要求,设计了基于单片机控制的交通灯控制终端。交通灯控制终端与智能协调中枢控制系统进行通信,反馈车流量信息,并按照中枢系统的要求来控制红绿灯的工作。本终端采用双单片机信号校验的方式,配合看门狗的使用,纠正终端运行过程中可能发生的错误,并加入警报和自投入备用模块,在运行出错情况下发出警报,在设备故障情况下自投入备用控制器,保证路口交通安全稳定。

In order to meet the requirement of regional coordination intelligent transportation system , this paper proposes a kind of traffic lights control terminal based on the application of single-chip microcomputer. This traffic light control terminal can exchange information with the intelligent coordinating central control system, feeds back information of traffic flow, adjust the working of the traffic lights according to the requirement of the central control system. The terminal adopts the mode of double MCU signal validation and applies the watch-dog technology, which can correct possible errors that may occur during run time. Moreover, with an additional alerting unit and automatic switchover standby module , the terminal can raise alarm in response to errors and automatic switchover to the stand-by controller when goes into failure. The traffic lights control terminal can greatly guaranteed safety and stable running of the traffic system.