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利用蒙特卡罗方法对水介质中的气泡幕的后向光散射回波信号进行了系统仿真。通过对计算结果与实验结果的比较,证明了蒙特卡罗方法的有效性。根据仿真结果,结合理论分析的方法,对气泡幕位置、厚度和接收器视场角等参数对回波信号的影响进行了分析,结果表明:回波信号出现时间与气泡幕位置存在一一对应的关系;在气泡幕的衰减系数ρσt不变的情况下,存在一个有效气泡幕厚度,当大于该厚度时,气泡幕的后向光散射回波信号基本不变;在系统各项参数不变的情况下,适当增加接收器的视场角,可有效地提高回波信号的信噪比。
The Monte Carlo method was used to simulate the backscattered echo signals of bubble curtains in aqueous media. By comparing the calculated results with the experimental results, the effectiveness of the Monte Carlo method is proved. According to the simulation results and the theoretical analysis, the influence of parameters such as bubble curtain position, thickness and receiver angle of view on the echo signals is analyzed. The results show that there is a one-to-one correspondence between the echo signal appearance time and the bubble curtain position ; In the case of bubble curtain attenuation coefficient ρσt constant, there is an effective bubble curtain thickness, when it is greater than the thickness, the bubble curtain backscattering echo signal is basically unchanged; the system parameters unchanged , The receiver’s field of view can be properly increased, which can effectively improve the signal-to-noise ratio of the echo signal.