【交通路灯】的课程设计汇本与报告.doc

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1、课程设计成绩：江汉大学文理学院数字电子技术课程设计报告课程设计题目交通路灯控制电路设计部（系）：信息技术学部专　业：10级电子信息工程２班　姓　名：娣２０１００６０１０２１３　　　　　　　同组人：芳２０１００６０１０２２３指导教师：建群　　　　　　２０１２年６月８日目录1.设计目的································································22.设计要求································································23.总体方案·········

2、·······················································24.具体实现································································34.1用555定时器振荡电路···············································34.2计数器电路·························································34.2.160秒计数器电路························

3、·······················44.2.25秒计数器····················································54.2.330进制计数器·················································64.3计数器控制电路·····················································74.4信号灯控制电路·····················································84.5整体电路的实现过程···

4、··············································95.实现过程中遇到的问题及措施············································106.设计心得体会···························································107.对该设计的建议·························································118.参考文献·········································

5、······················111.设计目的　　　在城市道路上的交叉路口一般设置有交通灯，用于管理两条道路通行车辆，现有一条主干道和一条支干道的汇合点形成一个十字交叉路口，为确保车辆安全、迅速的通行，在交叉路口的每条道上设置一组交通灯，交通灯由红黄绿3色组成。红灯亮表示此通道禁止车辆通过路口，黄灯亮表示此通道未过停车线的车辆禁止通行，已过停车线的车辆继续通行。绿灯亮表示该通道车辆可以通行。要求设计一个交通灯控制电路以控制十字路口两组交通灯的状态转换，指挥车辆安全通行。1.设计要求　　（1）设计一个十字路口交通灯控制电路，要求主干道与支干道交替通行。主干道通行时，

6、主干道绿灯亮，支干道红灯亮，时间为60秒。支干道通行时，支干道绿灯亮，主干道红灯亮，时间为30秒。　　（2）每次绿灯变红灯时，要求黄灯限量5秒钟，此时另一路口红灯也不变。　　（3）黄灯亮时，要求黄灯闪烁，频率为1Hz。　　（4）要求在绿灯亮（通信时间）和红灯亮（禁止通行时间）均有倒计时显示。2.总体方案　本设计采用的方案是用显示器，一个2—4译码器，若干十进制减法计数器74SL90，一个555定时器，若干J-K触发器，若干与门和或门以及信号灯（红，黄，绿三种颜色）来构成交通路灯控制电路。本电路的控制方法是：先用5片十进制减法计数器74SL190构成一个60进制，5进制以及30进

7、制的减法计数器，再由555定时器和两个电阻及电容来构成一个震荡电路来充当秒脉冲发生器，将其接到三个计数器的时钟信号CLK上让其开始计时，再通过一个2-4译码器来选择哪个计数器工作，再用2个J—K触发器构成的状态转移电路来控制两组信号灯的状态。整体电路框架结构图如下图所示：555定时器构成的振荡电路（秒脉冲）显示屏显示屏30秒计数器60秒计数器5秒计数器显示屏信号灯控制电路计数器控制电路主干道信号灯支干道信号灯1.具体实现电路中一共包含以下几个模块：4.1用555定时器振荡电路该电路的根本任务