CAJ | 학술논문

针对激光热膨胀致声，研究声波的接收信号及特性。分析了微音器接收端声波信号的产生原因是水底反射波和水面反射波，但是由于受实验条件限制没能分辨出这两种声波信号区别，对这一问题有待继续探究。结合实验现象，利用M atlab分析微音器接收声波信号的时间差与水深相互关系，并得出一组声波传播时间与距离和声波速度在两种介质的折射关系表达式。通过仿真可以在理论上对探测水深进行计算。
침대격광열팽창치성，연구성파적접수신호급특성。분석료미음기접수단성파신호적산생원인시수저반사파화수면반사파，단시유우수실험조건한제몰능분변출저량충성파신호구별，대저일문제유대계속탐구。결합실험현상，이용M atlab분석미음기접수성파신호적시간차여수심상호관계，병득출일조성파전파시간여거리화성파속도재량충개질적절사관계표체식。통과방진가이재이론상대탐측수심진행계산。
When a beam of strong laser is projected on the surface of water ,sound wave will be generated ,which will be reflected by the target under water .Thus the sound wave carries information of the target ,which can be used to detection .This paper describes the characters of sound wave generated by thermoelastic mechanism and analyses the two parts of the signals coming from the bottom of water and water surface .However ,due to the equipment’s defects ,the experiment does not succeed into distinguishing them .With the outcome of the experiment ,Matlab is also used to imitate the internal link of water ’s depth and the time audio monitoring receiver .Additionally ,this paper offers equations which can lead to the exact depth of water in this experiment ,with which ,Matlab can give a theoretical result .