摘要
进入90年代，电子技术取得了巨大的进步，电子元器件的体积变得很小，重量减轻，电能的消耗进一步降低。由于微处理器功能的增强，计算速度提高了几倍，价格也变得非常便宜，特别是可靠性得到了极大的提高，为用电子技术改造传统的汽车创造了条件。汽车在驾驶时有左转弯、右转弯刹车合紧开关停靠等基本操作。传统的手动控制系统存在一个致命漏洞：车灯完成上述动作后司机还需要进行复位操作才能使其恢复到初始状态。通常情况下，司机很容易忘记关闭转向灯,这就成为发生交通事故的一大隐患。为解决此问题，运用车灯智能控制系统对汽车转向灯进行控制，取到很好的效果。
完成此功能可以有三种设计方案：第一种是利用数字逻辑电路来实现，但这种方案所需硬件设备较多、造价高、电路复杂、难以维护；第二种方案是利用模拟电路来实现，此种方案虽然电路不是很复杂，硬件要求也不是很高，但它利用的是开关的机械传动理论，很容易引起机械误差，也很难维护；第三种是利用单片微机，通过软件控制来完成的装置，利用单片微型计算机来控制汽车前灯和尾灯的点亮和闪烁，能让汽车的前灯和尾灯根据需要自动点亮和熄灭。实践表明，该系统不仅从根本上解决了传统的手动控制汽车尾灯的诟病，完成了汽车转向灯的自动化控制，而且电路简单，对硬件设备的要求不是很高，且造价低，便于维护。
关键词:单片机,转向灯,程序,自动控制
Abstract
Entering the 1990s, having made enormous progress in electronic technology, the volume of the electronic devices and components became very small, weight lightens, the consumption of the electric energy is reduced further. Because of the enhancement of the function of the microprocessor, the computational speed has raised several times, the price becomes very cheap too, especially dependability has got great improvement, for transforming the traditional automobile and creating the condition with electronic technology. The automobile has left that turns , turns and brakes to shut the tight switch to stop etc. and operate basically in right while driving. The traditional manual control system has a deadly loophole: The driver needs to be restored to the throne and operated enabling it’s resuming the initial state after the car light finishes above-mentioned movements. Generally, the driver is very apt to forget to close the steering light, this becomes a great hidden danger of the traffic accident. In order to solve this problem , use the intelligent control system of the car light to control the steering light of the automobile, fetch to very good result.
There can be three kinds of design plans in this function to finish: The first kind makes use of digital logical circuit to realize, but this kind of scheme necessary hardware equipment is more, the fabrication cost is high, the circuit is complicated , difficult to maintain; The second kind of scheme is to make use of simulation circuit to be realized, though the circuit is not very complicated for this kind of scheme, the hardware requires it is not very high, but what it utilized is the mechanical drive theory of the switch, it is very apt to cause the mechanical error, very difficult to safeguard; The third kind utilizes the single slice of computers, control the device finished through the software, make use of single slice of microcomputers to control the lighting and glimmering of automobile headlight and taillight , make the headlight and taillight of the automobile light and go out automatically according to the need. Practice indicates , should not merely solve traditional controlling the condemning of the automobile taillight systematically manually fundamentally , the automation of finishing the steering light of the automobile is controlled, and the circuit is simple, the requisition for hardware equipment is not very high, and the fabrication cost is low , easy to safeguard.
Keyword: MCU, Steering light, program , automaticallies control
