模擬量處理為數字量紅外語音傳輸接收系統的設計

電子機電論文編號:JD667  論文字數:19324,頁數:50

目 錄

摘要…………………………………………………………………………………………Ⅰ
Abstract………………………………………………………………………………… Ⅱ
緒論…………………………………………………………………………………………1

第1章 紅外輻射基礎…………………………………………………………………… 3
   1.1 紅外輻射及紅外光譜………………………………………………………………3
1.2 紅外輻射基本定律…………………………………………………………………3
 1.2.1基爾霍夫定律…………………………………………………………………4 
 1.2.2 斯忒藩-玻爾茲曼定律………………………………………………………4
 1.2.3 維恩位移定律……………………………………………………………… 5
 1.2.4 普朗克定律…………………………………………………………………… 5  

第2章 紅外語音傳輸接收系統的總體設計思想…………………………………… 8
   2.1信號前置放大電路…………………………………………………………………8
 2.1.1 LA3210簡介……………………………………………………………………8
2.1.2 前置放大電路的設計與計算………………………………………………10
 2.2頻率調制解調電路………………………………………………………………11
 2.2.1 LM567簡介…………………………………………………………………12
 2.2.2 鎖相環及其在信號轉換電路中的應用……………………………………17
     2.2.2.1 鎖相環的組成和工作原理………………………………………17
     2.2.2.2 鎖相環用于調制和解調電路……………………………………20
     2.2.2.3 鎖相環用于頻率合成電路………………………………………22
      2.2.3  頻率調制電路的設計與計算……………………………………………23
      2.2.4  頻率解調電路的設計與計算……………………………………………24
2.3紅外發射電路…………………………………………………………………… 25
      2.3.1紅外發光二極管及發光組件………………………………………………25
    2.3.2紅外發射電路的設計與計算………………………………………………27
  2.4紅外接收電路……………………………………………………………………28
    2.4.1 紅外光電二極管……………………………………………………………28
    2.4.2 紅外接收電路的設計與計算………………………………………………29
  2.5四運算放大電路………………………………………………………30
  2.5.1 LM324簡介…………………………………………………………30
  2.5.2四運放在接收端信號放大電路中的設計與計算…………………………34
  2.5.3四運放在解調后音頻信號放大電路中的設計與計算……………………35
第3章 紅外語音傳輸接收系統的工作過程分析………………………………37
 3.1發射電路部分……………………………………………………………………37
 3.2 接收電路部分………………………………………………………………38
 3.3 元器件的選用及調試………………………………………………………… 39
第4章 紅外語音通信中需解決的問題…………………………………………………40
結論……………………………………………………………………………………… 41
致謝……………………………………………………………………………………42
參考文獻………………………………………………………………………………43
附錄A 紅外發射電路PCB圖………………………………………………………………44
附錄B 紅外接收電路PCB圖………………………………………………………………45

摘 要

本文介紹了模擬量處理為數字量紅外語音傳輸接收系統的基本結構，分析設計了音頻信號采集電路、信號前置放大電路、頻率調制電路、紅外發射電路、紅外接收電路、四運算放大電路、頻率解調電路以及聲音還原電路等各組成部分。文章概括性地闡述了用壓控頻率震蕩器（由鎖相環構成的頻率調制電路）對語音信號進行調制電路的原理及特點，以及由相應的鎖相環電路的引腳輸出跟蹤輸入信號頻率進行頻率解調電路的原理和特點。在前置音頻功率放大電路中使用了CD2822雙通道低電壓音頻功率放大電路，在頻率調制和解調電路中使用了LM567通用音頻解碼器，在接收機電路前置放大部分以及解調后音頻信號放大電路采用了LM324四運放集成電路

關鍵詞：頻率調制；頻率解調；前置放大；四運算放大

Design on Imitate the quantity processing to deliver to receive the system for the infrared speech of numerical quantity

Abstract

This text introduces to imitate the quantity the processing delivers the basic structure of receive the system for the red foreign language sound of numerical quantity, analyzing to design the audio frequency signal before collecting the electric circuit, signal placed the big electric circuit, frequency to make the electric circuit, red shot the electric circuit outside, red circumscribed to accept the electric circuit, four operated to enlarge the electric circuit, frequency solution to adjust the electric circuit and voice revivification electric circuit etc. was each to constitute the part.The article elaborated to use to press to control the frequency vibration machine( from lock mutually the frequency that wreath constitute makes the electric circuit) to carry on principle and characteristicses that makes the electric circuit to the speech signal generally, and from homologous lock mutually the wreath electric circuit leads the principle and the characteristics that the feet exportation follows to input the signal frequency to carry on the frequency solution to adjust the electric circuit.Fore place the audio frequency power to enlarge to used a passage  low electric voltage  audio frequency power to enlarge the electric circuit in the electric circuit, used the LM567  in general use audio frequency  decoding machine in frequency make reach agreement adjust electric circuit, after receiver electric circuit placed the big part and solutions to adjust before the audio frequency signal enlarged the electric circuit to adopt the LM324 four lucks to put the integrated circuit。

Keywords: The frequency make;The frequency solution adjust;Place before greatly;Four operations enlarge