激光多普勒技术跨介质探测水声信号的研究

海洋是丰富的资源宝库, 对海洋资源的开发和利用尤为重要。水空跨介质探测、通信、水下目标确定等技术一直是相关工作者关注的热点, 同时也是技术难题。声波作为一种机械波, 是水中良好的传播载体, 因此通过提取水下声波信息进行水空跨介质探测及通信不失为一种好方法, 但目前仍缺少完整的水下声信号传播模型及试验基础。本文提出一种基于有限元方法的水下声信号产生水面波纹振动的仿真模型, 并运用激光多普勒测振技术对水面波纹进行检测, 通过试验与仿真两种方式均能在水面以上精准得到水下声波信息。在相同水下声信号参数的条件下, 试验与仿真得到的水面波纹振幅大小一致, 验证了激光多普勒测振技术用于获取水下声波信息的可行性及所建立仿真模型的正确性, 为实现水空跨介质探测及通信的突破提供了试验基础及理论依据。

Abstract

The ocean is a treasure trove of rich resources, which is particularly important for the development and utilization of marine resources. Technologies such as water and air cross-medium detection, communication, and underwater target determination have always been the focus of attention of relevant workers with any difficulty. As a kind of mechanical wave, sound is a good propagation carrier in water. Therefore, it is an appropriate method to achieve detection and communication across the water-air interface by extracting underwater acoustic wave information. However, there is still a lack of complete underwater acoustic signal propagation models and experiments. In this case, this paper proposes a simulation model of water surface ripple vibration generated by underwater acoustic signal based on finite element method, which detects water surface ripple with laser Doppler vibration measurement technology. Accurate underwater acoustic information can be obtained by both experiments and simulations. With the conditions of the same underwater acoustic signal parameters, the amplitude of the water surface ripples obtained by the experiment and the simulation is the same, which verifies the feasibility of laser Doppler vibration measurement technology to obtain underwater acoustic wave information and the correctness of the established simulation model. It provides an experimental basis and theoretical basis for realizing breakthroughs in water-space cross-medium detection and communication.

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谭琪, 徐航, 杨依光, 陈治良, 盖宇, 张雅婷, 刘严严, 姚建铨. 激光多普勒技术跨介质探测水声信号的研究[J]. 应用激光, 2023, 43(3): 0127. Tan Qi, Xu Hang, Yang Yiguang, Chen Zhiliang, Gai Yu, Zhang Yating, Liu Yanyan, Yao Jianquan. Research on Cross-Interface Detection of Underwater Acoustic Signals by Laser Doppler Technology[J]. APPLIED LASER, 2023, 43(3): 0127.

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