| 梁启慧,刘丽华,郭永刚,李整林,王肃静.不完全深海声道下多途到达结构及测距*[J].,2025,43(3):646-657 |
| 不完全深海声道下多途到达结构及测距* |
| Characteristics and ranging of multi-path arrival structures under incomplete deep-water acoustic channels |
| 投稿时间：2023-11-21 修订日期：2025-04-22 |
| 中文摘要: |
| 声波多途到达结构是可用于深海被动测距的常见特征量之一。在不完全深海声道中，由于海水深度余量不足以让声线反转，位于海底的接收单元能够接收到直达声线、多次海底海面反射声线和只经过海底反射后反转的声线。某海域不完全声道实验发现海底接收单元在30 km后接收到了只经过两次海底反射后的反转声线。因此，该文推导了不完全深海信道中不同收发距的多途时延差计算公式，经过与实际观测的时延差对比分析，发现所推导的时延差计算方法与实际观测时延差在不同收发距(0~45 km)均能很好吻合，验证了方法的准确性。从而，可以利用海底反射后反转声线及其他多次海底海面反射声线的多途时延差进行测距。 |
| 英文摘要: |
| The multi-path arrival structure of sound wave is one of the common characteristic quantities that can be used for passive ranging in deep sea. In the incomplete deep-sea sound channel, the receiving unit located on the seabed can receive direct sound lines, multiple submarine surface reflected sound lines and only reversed sound lines after seabed reflection, because the sea depth margin is not enough to reverse the sound lines. The incomplete acoustic channel experiment in a certain sea area found that the submarine receiving unit received the reversed acoustic line after only two submarine reflections after 30 km. Therefore, this paper deduces the multi-path delay difference calculation formula for different transmitting and receiving distances in incomplete deep-sea channels. After comparing and analyzing the delay difference with the actual observation, it is found that the deduced delay difference calculation method and the actual observation delay difference can be well matched at different transmitting and receiving distances (0-45 km), which verifies the accuracy of the method. Therefore, the multi-path delay difference between the reversed sound lines and other multiple submarine and surface reflected sound lines can be used for distance measurement. |
| DOI：10.11684/j.issn.1000-310X.2025.03.013 |
| 中文关键词: 不完全深海声道，多途时延差，被动测距，射线声学 |
| 英文关键词: incomplete deep-water acoustic channel, multipath delay difference, passive ranging, ray theory |
| 基金项目:国家自然科学基金项目(U22A2012), 国家重大科技基础设施建设项目(2017-000030-73-01-002437), 中国科学院青年创新促进会项目资助 |
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