摘 要对于无线遥控技术，当前基本上通过以下几种方式实现：红外遥控方式，无线电遥控方式，超声波遥控方式。红外技术出现比较早，成本低，价格也具有优势。红外遥控具有以下优点：控制容多，抗干扰能力比较强，不会发生任何误动作；响应速度快，不会对其他电器产生干扰从而影响用户使用；体积小，成本低，功耗小，与其他方式比可以降低功耗 90%。目前红外遥控、遥测技术在彩电、录像机、音响设备、空调、玩具、门铃、遥控汽车路牌以与防盗等其它小型装上得到了广泛的应用。采纳红外线做通信媒介, 经实验证明, 在没有阻碍的有限圈（例如一个房间, 车间或实验室）具有无线电无法比拟的优势。所以对本课题的讨论是很有必要的。通过对设计要求的仔细分析和讨论，拿出了几种可行方案，最终选定了一个最佳方案。该方案是采纳先进的单片机技术实现遥控的主要手段。电路主要由发送电路和接收电路组成。发送端主要由 AT89C2051 单片机，红外发射电路，红外发射指示灯以与键盘输入等构成，发射出红外信号；接收端主要由AT89C52 单片机，红外接收电路，状态指示电路，可控硅调光电路以与+5V电源等组成。我们所设计的遥控器能控制 5 个电器的电源开关，并且可对一路电灯进行亮度的调节。关键字：遥控电路，红外发射，红外接收，单片机ABSTRACTFor wireless remote control technology, we mainly use several ways below: Infrared remote, Wireless remote control, Ultrasonic control. Infrared remote technology appears earlier and its cost is lower. Infrared remote has several advantages below: The content it controls is more than others, its anti-interference ability is stronger and it can avoid any wrong action; it realizes faster and it will never influence other electrical equipment. In additional, the volume of the infrared remote system is small, the cost is low and the power is lower 90% than other ways.At this time, infrared remote control and test technology is applied to many small devices just like color TV, video tape recorder (VCR), audio equipment, air-condition, toys, doorbell, billboards of remote cars, Anti-theft device, and so on....
