电视伴音红外转发器的设计

文档编号:JD111   字数:20612,页数:51

摘 要
电视伴音红外转发器是目前家用电视中常采用的一种遥控装置，它具有结构简单、成本低、无干扰、低噪声等特点，因此红外转发器的应用较为广泛。
本文主要研究了电视伴音通道的作用及组成，并对伴音通道的电路进行了详细地分析，为红外转发器实现电视伴音信号的转发提供了应用依据；介绍了红外转发器的组成及工作原理，并详细地阐述了红外发射电路和红外接收电路的工作过程。在熟悉红外转发器的原理及应用的基础上，设计了一种简单实用的电视伴音红外转发器，并从各部分电路的构成以及采用的器件方面，分别对红外发射电路和红外接收电路做了较为细致地阐述，并说明了各自电路的工作过程。
本文最后对系统的调试过程以及调试过程中的注意事项做了详细说明，并针对该设计方案中存在的一些不足之处，提出了一些改进意见。

关键词：电视伴音，红外转发器，发射器，接收器

Abstract
The aural infrared transponder is one kind of remote monitor which in the present domestic television often uses, it has the structure to be simple, the cost low, does not have characteristics and so on disturbance, low noise, therefore the infrared transponder's application is more widespread. This article has mainly studied the aural channel's function and the composition, and carried on to sound channel's electric circuit has analyzed in detail, realized the aural signal repeater for the infrared transponder to provide the application basis; Introduced the infrared transponder's composition and the principle of work, and elaborated the infrared emission electric circuit and the infrared accepting circuit's work process in detail. In the familiar infrared transponder's principle and in the application foundation, has designed one kind of simple practical aural infrared transponder, and component aspect which as well as uses from various part of electric circuit's constitution, separately did to the infrared emission electric circuit and the infrared accepting circuit elaborated carefully, and explained the respective electric circuit's work process. This article finally has given detailed showing to system's debugging process as well as the debugging process's matters needing attention, and aims at some deficiencies which in this design proposal exists, gave some improvement comment.
key word: Aural, infrared transponder, launcher, receiver

目 录
摘要 ....................................................... .......i
目录..............................................................  ii
第1章前言 .......................................................... 1
1.1 课题研究背景及目的..............................................  1
1.2 方案选择与比较 .................................................. 1
1.3 红外技术概述及应用 .............................................. 1
1.3.1 军事方面应用 .................................................. 3
1.3.2 民用方面应用 .................................................. 6
1.4 本文构成及研究内容 ...............................................8
第2章电视伴音通道工作原理 .......................................... 10
2.1 电视伴音通道概述 ................................................ 10
2.1.1 伴音通道的作用 ................................................ 11
2.1.2 伴音通道的组成 ................................................ 12
2.2 电视伴音通道电路 ................................................ 14
2.2.1 伴音中放电路 .................................................. 14
2.2.2 伴音鉴频电路 .................................................. 14
2.2.3 伴音低频放大电路 .............................................. 15
2.3 本章小结 ................................................... .....16
第3章  红外转发器组成及原理...........................................17
3.1 红外转发器组成................................................... 17
3.1.1 红外发射器 .................................................... 17
3.1.2 红外接收器....................................................  18
3.2 红外转发器工作原理 .............................................. 20
3.2.1 红外发射器工作原理 ............................................ 20
3.2.2 红外接收器工作原理 .............................................21
3.3 红外转发器技术参数 ...............................................21
3.4 本章小结...................................................  .....21
第4 章电视伴音红外转发器的实现...................................... 23
4.1 红外发射器电路设计................................................23
4.1.1 三极管驱动放大器............................................... 24
4.1.2 红外发光管................................................... . 26
4.1.3 具体电路说明................................................... 28
4.2 红外接收器电路设计 ...............................................29
4.2.1 红外接收管 .................................................... 29
4.2.2 音频放大器 ................................................... .31
4.2.3 具体电路说明 ...................................................36
4.3 本章小结...................................................  .....37
第 5章系统调试与改进意见 ........................................... 38
5.1 系统调试过程说明 .................................................38
5.1.1 红外发射器电路调试 .............................................38
5.1.2 红外接收器电路调试..............................................38
5.2 系统改进意见...................................................  .39
5.3 本章小结......................................................... 40
结    论...................................................  .........41
致    谢...................................................  .........42
参考文献................................................... ..........43

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