CAJ | 학술논문

根据声学参量阵原理,设计了一个3×3的九元矩形换能器阵及其测试系统,并在空气进行验证性实验;系统包括正弦信号产生电路、信号控制电路、功率放大电路以及回波信号接收电路等,辅以LabVIEW平台,实现正弦信号和脉冲控制信号的产生,发射信号时间长度控制以及功率放大,并最终驱动换能器阵;实验表明,当有85kHz和90kHz的正弦信号产生时,系统各部分均能正常工作,能够听到天花板处有声响,且回波信号中含有5kHz的频率成分,即证明换能器阵及其系统的设计均是可行的.
근거성학삼량진원리,설계료일개3×3적구원구형환능기진급기측시계통,병재공기진행험증성실험;계통포괄정현신호산생전로、신호공제전로、공솔방대전로이급회파신호접수전로등,보이LabVIEW평태,실현정현신호화맥충공제신호적산생,발사신호시간장도공제이급공솔방대,병최종구동환능기진;실험표명,당유85kHz화90kHz적정현신호산생시,계통각부분균능정상공작,능구은도천화판처유성향,차회파신호중함유5kHz적빈솔성분,즉증명환능기진급기계통적설계균시가행적.
Based on the theory of parametric acoustic array, one 3 × 3 nine- element rectangular transducer array and a test system were designed.The experiment to check whether the design is feasible was done in the air. The system based on LabVIEW consists of sine signal generators, signal control circuits . power amplifiers circuits and echo receiving circuits, to generate sine and pulse signals, control the time length of send -signals and amplify the power, and finally to drive the transducer array. Deducted by the experiment, when the signals whose frequencies are 85 kHz and 90 kHz are generated, every part of the system all can work normally, and some sounds can be heard near the ceiling, besides, the sounds contain signals whose frequencies is about 5kHz . All of that showed that the design of array and its test system is feasible.