電視伴音紅外轉發器的設計

電子機電論文編號:JD111   字數:20612,頁數:51

目 錄
摘要 ....................................................... .......i
目錄..............................................................  ii
第1章前言 .......................................................... 1
1.1 課題研究背景及目的..............................................  1
1.2 方案選擇與比較 .................................................. 1
1.3 紅外技術概述及應用 .............................................. 1
1.3.1 軍事方面應用 .................................................. 3
1.3.2 民用方面應用 .................................................. 6
1.4 本文構成及研究內容 ...............................................8
第2章電視伴音通道工作原理 .......................................... 10
2.1 電視伴音通道概述 ................................................ 10
2.1.1 伴音通道的作用 ................................................ 11
2.1.2 伴音通道的組成 ................................................ 12
2.2 電視伴音通道電路 ................................................ 14
2.2.1 伴音中放電路 .................................................. 14
2.2.2 伴音鑒頻電路 .................................................. 14
2.2.3 伴音低頻放大電路 .............................................. 15
2.3 本章小結 ................................................... .....16
第3章  紅外轉發器組成及原理...........................................17
3.1 紅外轉發器組成................................................... 17
3.1.1 紅外發射器 .................................................... 17
3.1.2 紅外接收器....................................................  18
3.2 紅外轉發器工作原理 .............................................. 20
3.2.1 紅外發射器工作原理 ............................................ 20
3.2.2 紅外接收器工作原理 .............................................21
3.3 紅外轉發器技術參數 ...............................................21
3.4 本章小結...................................................  .....21
第4 章電視伴音紅外轉發器的實現...................................... 23
4.1 紅外發射器電路設計................................................23
4.1.1 三極管驅動放大器............................................... 24
4.1.2 紅外發光管................................................... . 26
4.1.3 具體電路說明................................................... 28
4.2 紅外接收器電路設計 ...............................................29
4.2.1 紅外接收管 .................................................... 29
4.2.2 音頻放大器 ................................................... .31
4.2.3 具體電路說明 ...................................................36
4.3 本章小結...................................................  .....37
第 5章系統調試與改進意見 ........................................... 38
5.1 系統調試過程說明 .................................................38
5.1.1 紅外發射器電路調試 .............................................38
5.1.2 紅外接收器電路調試..............................................38
5.2 系統改進意見...................................................  .39
5.3 本章小結......................................................... 40
結    論...................................................  .........41
致    謝...................................................  .........42
參考文獻................................................... ..........43

摘 要
電視伴音紅外轉發器是目前家用電視中常采用的一種遙控裝置，它具有結構簡單、成本低、無干擾、低噪聲等特點，因此紅外轉發器的應用較為廣泛。
本文主要研究了電視伴音通道的作用及組成，并對伴音通道的電路進行了詳細地分析，為紅外轉發器實現電視伴音信號的轉發提供了應用依據；介紹了紅外轉發器的組成及工作原理，并詳細地闡述了紅外發射電路和紅外接收電路的工作過程。在熟悉紅外轉發器的原理及應用的基礎上，設計了一種簡單實用的電視伴音紅外轉發器，并從各部分電路的構成以及采用的器件方面，分別對紅外發射電路和紅外接收電路做了較為細致地闡述，并說明了各自電路的工作過程。
本文最后對系統的調試過程以及調試過程中的注意事項做了詳細說明，并針對該設計方案中存在的一些不足之處，提出了一些改進意見。

關鍵詞：電視伴音，紅外轉發器，發射器，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