根据到达时间差异的最大后续水下声源定位,考虑到折射
1Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361010, China.
The Journal of the Acoustical Society of America
|March 14, 2025
概括
这项研究引入了一种新的3D水下声源定位方法,使用直接和表面反射到来. 它通过共同估计深度和水平位置来提高准确性,克服了传统范围依赖技术的局限性.
科学领域:
- 海洋学 海洋学 海洋学
- 声学 声学 在声学上.
- 信号处理 信号处理
背景情况:
- 传统的水下声源定位依赖于到达时间差异 (TDOA),通常涉及多步估计.
- 现有的方法容易出现错误,特别是在范围估计方面,从而损害了整体定位的准确性.
- 在水下环境中的折射效应进一步复杂化了传统的定位方法.
研究的目的:
- 开发一种新的三维 (3D) 水下声源定位方法.
- 通过同时直接估计源深度和水平位置来提高定位准确性.
- 为了解决传统的两步方法的局限性,这些方法因范围估计错误而受到损害.
主要方法:
- 使用TDOA测量从直接和表面反射的声学到达多个水声机 (N ≥3) 的测量.
- 纳入折射效应,并考虑水声机位置错误,TDOA不准确性和声音速度变化.
- 采用贝叶斯最大后期 (MAP) 估计用于共同源定位.
主要成果:
- 拟议的方法直接估计了源深和水平位置,消除了中间范围的估计.
- 与传统的两步方法相比,模拟研究表明本地化性能优越.
- 该方法有效地处理海面反射的多路径信号.
结论:
- 新的3D定位方法为水下声源定位提供了更高的可靠性.
- 准确的水下来源定位对于海洋研究,航行和环境监测至关重要.
- 对源参数的联合估计显著提高了在具有挑战性的声环境中的定位精度.
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