CAJ | 학술논문

针对课堂教学、室内会议等对扩声系统的需求，提出了一种基于FM 的无线扩声系统．该系统包括FM 收发模块和图形用户界面（GUI）软件．FM 收发模块采用C8051F340单片机控制RDA5820实现对语音信号的无线收发，同时通过USB从PC机获取工作频率并发送语音数据；用LabVIEW实现的GUI软件可通过USB修改FM 收发频率，并将获取的语音数据进行扩声播放．该系统收发模块采用一体设计，实现语音的FM 无线收发，可自动切换收发工作模式，实验表明该系统方案合理可行．
침대과당교학、실내회의등대확성계통적수구，제출료일충기우FM 적무선확성계통．해계통포괄FM 수발모괴화도형용호계면（GUI）연건．FM 수발모괴채용C8051F340단편궤공제RDA5820실현대어음신호적무선수발，동시통과USB종PC궤획취공작빈솔병발송어음수거；용LabVIEW실현적GUI연건가통과USB수개FM 수발빈솔，병장획취적어음수거진행확성파방．해계통수발모괴채용일체설계，실현어음적FM 무선수발，가자동절환수발공작모식，실험표명해계통방안합리가행．
In response to the demand of sound reinforcement system used in the classroom ,conference room and other places ,wireless sound reinforcement system based on LabVIEW is proposed .The system includes FM transceiver modules and graphical user interface (GUI) software .The FM transceiver mod‐ule implements voice signal wireless transceiver by using C8051F340 MCU to control RDA5820 ,which gets the operating frequency via USB from a PC and sends voice data ;the GUI which is realized by Lab‐VIEW software can modify FM transceiver frequency by USB ,and the acquired voice data can be ampli‐fied and played .The system is integrated designed of transceiver module to and implement FM voice sig‐nal wireless transceiver ,which can automatically switch the transceiver mode .The experiments show that the system is reasonable and feasible .