大功率红外发射与接收(无线话筒)

电子机电论文编号:JD796  论文字数:5950,页数:16

  大功率红外发射与接收(无线话筒)

目录
摘  要 I
Abstract II
引言 1
1 方案设计 1
2 系统工作原理 1
3 硬件电路以及电路工作原理图 4
3.1 器件介绍 4
3.1.1特性 4
3.1.2 LM567内部结构及工作原理 4
3.1.3 LM567调制电路 7
3.1.4 LM567解调电路 8
3.3总体硬件电路 8
3.4 干扰处理电路 11
4  结论 11
参考资料 12
谢  辞 13

摘  要
本文介绍的红外话筒以红外光作为声音信号的载体，进行声音信号的调制过程。包括拾音器、信号调制及放大电路、信号发射器、信号接收器、信号还原及放大电路。红外发光管将电信号转换为光信号并向空间传输，光敏器件接收该光信号并转换为电信号再传递给信号还原及放大电路。红外线话筒频率在3G以上，频率环境干净，很少有设备辐射干扰波。使用上不受包房数量的限制，通用性好，保密等特点却是射频话筒无法比拟的。
关键词：调制 ；解调；红外通信； 发射； LM567 

High-power infrared emission and reception
 (wireless microphone)

Abstract
This design introduces the infrared microphone by the infrared light took the sound signal the carrier, carries on the sound signal the modulation and the demodulation process.Including acoustic pickup, signal modulation and enlargement electric circuit, signal projector, signal receiver, signal return to original state and enlargement electric circuit. The infrared photo tube transforms the electrical signal into the light signal and to the spatial transmission, the light-seeking homing receives this light signal and transforms into the electrical signal transmits again for the signal return to original state and the enlargement electric circuit.The infrared microphone frequency above 3G, the frequency environment is clean, very little has the equipment to radiate the disturbing wave.Uses is reserved a room quantity limit, the versatility is good, keeping secret and so on ,which are incomparable  with the radio frequency microphone.
Key word: Modulation demodulation；Infrared communication；Launches；LM567