小型等离子体声源在水声领域的应用前景分析

Application Prospect Analysis on Plasma Source in Field of Underwater Acoustics

摘要:

简要介绍了液电效应及等离子体声源的一些基本情况，并根据实验采集到的不同等离子声源数据，选取了其中 2 组进行分析。对实验采集到的等离子声源单次脉冲声信号和脉冲串声信号进行了时域信号分析，通过 MATLAB 软件计算了信号在不同时刻的能量幅值。随后，在频域对信号进行频谱分析，通过 FFT 变换分析了信号在频域范围内的能量分布。之后，对信号的功率谱进行了估计，用 PSD 算法分析了能量在不同频率上的分布信息，得出了等离子体声源信号频率范围广、低频能量大的结论。最后，结合等离子体声源信号频率及能量分布情况，对等离子体声源在水声领域的应用前景进行了分析。

关键词:等离子体;声源;脉冲串

Abstract:

In this paper，the basic situation of electro-hydraulic effect and plasma sound source is briefly introduced，and two groups of plasma sound source data in the different groups of plasma sound source data collected by the experiments are selected for analysis. The single pulse acoustic signal and the pulse crosstalk signal collected by the experiments are analyzed in time domain. The energy amplitude of the signal in different time are calculated by MATLAB software. Then，the signal in frequency domain is analyzed，and the energy distribution of the signal in frequency domain is analyzed by FFT transformation. Then spectral analysis is conducted on signals in frequency domain，and PSD is used to analyze the energy distribution information at different frequencies. The conclusion is drawn that the frequency range of the plasma sound source signal is wide and the low frequency energy is large. Finally，the application prospect of the plasma sound source in underwater acoustic field is analyzed in combination with the frequency and the energy distribution of the plasma sound source signal.

Key words:Plasma;sound source;pulse train