大功率紅外發(fā)射與接收(無線話筒)

電子機(jī)電論文編號:JD796  論文字?jǐn)?shù):5950,頁數(shù):16

  大功率紅外發(fā)射與接收(無線話筒)

目錄
摘  要 I
Abstract II
引言 1
1 方案設(shè)計(jì) 1
2 系統(tǒng)工作原理 1
3 硬件電路以及電路工作原理圖 4
3.1 器件介紹 4
3.1.1特性 4
3.1.2 LM567內(nèi)部結(jié)構(gòu)及工作原理 4
3.1.3 LM567調(diào)制電路 7
3.1.4 LM567解調(diào)電路 8
3.3總體硬件電路 8
3.4 干擾處理電路 11
4  結(jié)論 11
參考資料 12
謝  辭 13

摘  要
本文介紹的紅外話筒以紅外光作為聲音信號的載體，進(jìn)行聲音信號的調(diào)制過程。包括拾音器、信號調(diào)制及放大電路、信號發(fā)射器、信號接收器、信號還原及放大電路。紅外發(fā)光管將電信號轉(zhuǎn)換為光信號并向空間傳輸，光敏器件接收該光信號并轉(zhuǎn)換為電信號再傳遞給信號還原及放大電路。紅外線話筒頻率在3G以上，頻率環(huán)境干凈，很少有設(shè)備輻射干擾波。使用上不受包房數(shù)量的限制，通用性好，保密等特點(diǎn)卻是射頻話筒無法比擬的。
關(guān)鍵詞：調(diào)制 ；解調(diào)；紅外通信； 發(fā)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