毕业设计论文系列~基于51单片机的红外遥控设计-毕业设计论文word文档[管理资料]

毕业设计（论文）

卧室电器用红外遥控器

（基于51单片机的红外遥控器设计）Bedroom Appliances With The Infrared Remote Control(Based on 51 single-chip infrared remote control design)

系别：电子信息技术工程技术

专业名称：电子092班

学生姓名：李积元

学号：2009523218

指导教师姓名、职称：周燕

完成日期 2012 年 4 月

摘要

红外遥控是目前家用电器中用得较多的遥控方式。我们知道，红外线是

人的眼睛能看到的可见光按波长从长到短排列，依次为红、橙、黄、绿、青、蓝、紫。～；～。比紫光波长还短的光叫紫外线，比红光波长还长的光叫红外线。～。常用的红外遥控系统一般分发射和接收两个部分。发射部分的主要元件为红外发光二极管。

很多电器都采用红外遥控,那么红外遥控的工作原理是什么呢?本文将介绍其原理和设计方法。红外遥控常用的载波频率为38kHz，这是由发射端所使用的455kHz晶振来决定的，在发射端要对晶振进行整数分频，分频系数一般取12，所以455kHz÷12≈ kHz≈38kHz。也有一些遥控系统采用36kHz、40kHz、56kHz等，一般由发射端晶振的振荡频率来决定。接收端的输出状态大致可分为脉冲、电平、自锁、互锁、数据五种形式。“脉冲”输出是当按发射端按键时，接收端对应输出端输出一个“有效脉冲”，宽度一般在100ms左右。一般情况下，接收端除了几位数据输出外，还应有一位“数据有效”输出端，以便后级适时地来取数据。这种输出形式一般用于与单片机或微机接口。除以上输出形式外，还有“锁存”和“暂存”两种形式。所谓“锁存”输出是指对发射端每次发的信号，接收端对应输出予以“储存”，直至收到新的信号为止；“暂存”输出与上述介绍的“电平”输出类似。

70年代研制出的红外遥控技术，随着大规模集成电路和微处理技术的发展和成熟，红外线遥控系统也迅速发展并得到广泛的应用，特别是在家用电器上的成功应用，给人们的工作、生活和娱乐带来了极大的方便，随着城市居民生活水平的提高，家庭里家用电器的种类和数量逐步增加，与之配套

的红外遥控发射器也越来越多

关键词：80c51单片机、红外发光二极管、晶振

Summary

The infrared remote control home appliances used more remote way.

We know that infrared is the human eye can see the visible light wavelength from long to short arrangement, followed by red, orange, yellow, green, blue, blue, purple. Which the red wavelength range of ~ ; violet wavelength range of ~ . Shorter than the violet wavelengths of light called ultraviolet light than the red wavelength of light called infrared. Infrared remote control is the use of a wavelength of between ~ near-infrared to transmit control signals. Infrared remote control systems are generally divided into transmit and receive two parts. The main components of the emission part of the infrared light-emitting diodes.

Many electrical appliances are using the infrared remote control, infrared remote control works what is it? This article describes the principle and design method. Infrared remote common carrier frequency of 38kHz, which is determined by the 455kHz crystal used by the transmitter, the transmitter crystal is the integer frequency divider factor generally take 12, so 455kHz ÷12 ≈ kHz ≈38kHz. Remote control system uses 36kHz, 40kHz, 56 kHz, generally determined by the oscillation frequency of the transmitter crystal. The receiving end of the output state can be broadly divided into the pulse level, self-locking, interlocking, data five forms. "Pulse" output is press the transmitter button, the receiver corresponds to the output terminal an "effective pulse", width of about 100ms. Under normal circumstances, the receiver in addition to several data output, there should be a "data valid" output, so that after the class in a timely manner to take the data. The form of this output is generally used to interface with a microcontroller or microprocessor. In addition to the output in the form above, as well as "latch" and "temporary" in two forms. The so-called "latch output signal issued by each transmitter, the receiver corresponds to the output to be" stored "until they receive the new signal; similar to the output of" temporary "output of the above described level.

Infrared remote control technology developed in the 1970s, with large-scale integrated circuits and micro-processing technology to develop and mature, infrared remote control system for the rapid development and wide range of applications, especially in the successful application of household appliances, to the people, live and play has brought great convenience, with the improvement of living standards, urban residents, the type and number of household appliances in the family gradually increase, more and more infrared remote control transmitter accompanying

Keywords: 80C51 microcontroller, infrared light-emitting diodes, crystal

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