模拟量处理为数字量红外语音传输接收系统的设计

范文编号:JD667  范文字数:19324,页数:50

摘 要

本文介绍了模拟量处理为数字量红外语音传输接收系统的基本结构，分析设计了音频信号采集电路、信号前置放大电路、频率调制电路、红外发射电路、红外接收电路、四运算放大电路、频率解调电路以及声音还原电路等各组成部分。文章概括性地阐述了用压控频率震荡器（由锁相环构成的频率调制电路）对语音信号进行调制电路的原理及特点，以及由相应的锁相环电路的引脚输出跟踪输入信号频率进行频率解调电路的原理和特点。在前置音频功率放大电路中使用了CD2822双通道低电压音频功率放大电路，在频率调制和解调电路中使用了LM567通用音频解码器，在接收机电路前置放大部分以及解调后音频信号放大电路采用了LM324四运放集成电路

关键词：频率调制；频率解调；前置放大；四运算放大

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

目 录

摘要…………………………………………………………………………………………Ⅰ
Abstract………………………………………………………………………………… Ⅱ
绪论…………………………………………………………………………………………1

第1章 红外辐射基础…………………………………………………………………… 3
   1.1 红外辐射及红外光谱………………………………………………………………3
1.2 红外辐射基本定律…………………………………………………………………3
 1.2.1基尔霍夫定律…………………………………………………………………4 
 1.2.2 斯忒藩-玻尔兹曼定律………………………………………………………4
 1.2.3 维恩位移定律……………………………………………………………… 5
 1.2.4 普朗克定律…………………………………………………………………… 5  

第2章 红外语音传输接收系统的总体设计思想…………………………………… 8
   2.1信号前置放大电路…………………………………………………………………8
 2.1.1 LA3210简介……………………………………………………………………8
2.1.2 前置放大电路的设计与计算………………………………………………10
 2.2频率调制解调电路………………………………………………………………11
 2.2.1 LM567简介…………………………………………………………………12
 2.2.2 锁相环及其在信号转换电路中的应用……………………………………17
     2.2.2.1 锁相环的组成和工作原理………………………………………17
     2.2.2.2 锁相环用于调制和解调电路……………………………………20
     2.2.2.3 锁相环用于频率合成电路………………………………………22
      2.2.3  频率调制电路的设计与计算……………………………………………23
      2.2.4  频率解调电路的设计与计算……………………………………………24
2.3红外发射电路…………………………………………………………………… 25
      2.3.1红外发光二极管及发光组件………………………………………………25
    2.3.2红外发射电路的设计与计算………………………………………………27
  2.4红外接收电路……………………………………………………………………28
    2.4.1 红外光电二极管……………………………………………………………28
    2.4.2 红外接收电路的设计与计算………………………………………………29
  2.5四运算放大电路………………………………………………………30
  2.5.1 LM324简介…………………………………………………………30
  2.5.2四运放在接收端信号放大电路中的设计与计算…………………………34
  2.5.3四运放在解调后音频信号放大电路中的设计与计算……………………35
第3章 红外语音传输接收系统的工作过程分析………………………………37
 3.1发射电路部分……………………………………………………………………37
 3.2 接收电路部分………………………………………………………………38
 3.3 元器件的选用及调试………………………………………………………… 39
第4章 红外语音通信中需解决的问题…………………………………………………40
结论……………………………………………………………………………………… 41
致谢……………………………………………………………………………………42
参考文献………………………………………………………………………………43
附录A 红外发射电路PCB图………………………………………………………………44
附录B 红外接收电路PCB图………………………………………………………………45

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