CAJ | 학술논문

该装置是利用555数字芯片制作信号发生器，产生低频可调的方波，经积分电路，产生三角波和正弦波，再由tda2030组成的功率放大器放大，输送至扬声器，使其起振的装置。将该装置放置于水中，把水波视为一种机械波，则可以作为波的干涉、波的衍射以及多普勒效应的教学演示装置。从信号发生器中产生的三种波形，也可以作为相同频率和幅度的三种音频信号的差异的教学演示仪，以及驻波的演示。该装置是可调频调幅的，教学演示的范围广。
해장치시이용555수자심편제작신호발생기，산생저빈가조적방파，경적분전로，산생삼각파화정현파，재유tda2030조성적공솔방대기방대，수송지양성기，사기기진적장치。장해장치방치우수중，파수파시위일충궤계파，칙가이작위파적간섭、파적연사이급다보륵효응적교학연시장치。종신호발생기중산생적삼충파형，야가이작위상동빈솔화폭도적삼충음빈신호적차이적교학연시의，이급주파적연시。해장치시가조빈조폭적，교학연시적범위엄。
A device is produced using the digital chip 555 to make signal generator that can produce low-frequency tunable square wave through the integral circuit,to produce the triangular wave and sine wave,and then amplified by the power amplifier TDA2030 composed.The wave delivered to the speaker, to start-up itself.The device placed in the surface of the water, and the waves as a mechanical wave,can be as the teaching demonstration device of wave interference,wave diffraction and the Doppler effects.The three waveforms from the signal generator can also be as a teaching demonstrator that distinguishes the identical frequency and amplitude differences between the three audio,as well as VSWR.The device is tunable frequency and amplitude,and has a wide range of teaching demonstration.