Stevens Passive Acoustic System for underwater surveillance
Stevens Passive Acoustic System for underwater surveillance
复制标题
用于水下监视的史蒂文斯被动声学系统
DOI：
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发表时间：
2010
期刊：
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通讯作者：
M. Bruno
中科院分区：
文献类型：
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作者：
A. Sutin;B. Bunin;A. Sedunov;N. Sedunov;L. Fillinger;M. Tsionskiy;M. Bruno
Stevens被动声学系统可以检测、跟踪和分类各种水面和水下声源，包括水面船只、游泳者、各种类型的潜水员和无人水下航行器。该系统由史蒂文斯在其海事安全实验室开发，该实验室的建立是为了支持反恐和部队保护领域的研究。该实验室的重点是利用多种技术对地表和地下入侵者构成的威胁进行持续检测和分类。使用这些功能，我们已经调查了一组基本的水声威胁检测，包括潜水员的声学特征，声传输损耗和声环境噪声的声学参数。史蒂文斯被动声学系统已成功地展示了水面舰艇探测和分类。该系统使用4个水听器同时采集和分析声信号。分析功能包括任意数字滤波、频谱分析和互相关，用于同时处理来自多个水听器的信号、声源分离以及确定不同目标相对于中心水下系泊的方位。该系统还记录和存储完整的原始声学数据集，从而能够进一步研究和分析声学信号。系统中采用的新型声学信号处理方法包括：1.水听器精确定位方法。2.目标方位确定的互相关法3.用于从多个源提取目标特征的互相关方法。4.自动潜水员检测算法。5.测量与螺旋桨和轴旋转有关的船舶噪声调制频谱（噪声包络调制检测- DEMON方法）。史蒂文斯被动声学系统已被用于测试在哈德逊河和纽约港，其中一个大型图书馆的船舶声学签名已被收集。美国海军赞助的几次试验证明了史蒂文斯系统在700米距离内有效探测潜水员的能力。
The Stevens Passive Acoustic System allows the detection, tracking and classification of various surface and underwater sources of sound including surface vessels, swimmers, various types of divers, and unmanned underwater vehicles. This system was developed by Stevens in its Maritime Security Laboratory, which was established to support research in the area of Anti-Terrorism and Force Protection. The focus of this lab has been the persistent detection and classification of threats posed by surface and subsurface intruders utilizing a multiplicity of technologies. Using these capabilities, we have investigated the set of acoustic parameters fundamental to underwater acoustic threat detection, including diver acoustic signatures, acoustic transmission loss, and acoustic environmental noise. The Stevens Passive Acoustic System has successfully demonstrated surface ship detection and classification. The system provides simultaneous acquisition and analysis of acoustical signals using 4 hydrophones. The analysis functions includes arbitrary digital filtering, spectral analysis and cross-correlation for simultaneous processing of signals from several hydrophones, acoustical source separation, and determination of bearing for different targets relative to the central underwater mooring. The system also records and stores the complete raw acoustical data set, enabling further research and analysis of the acoustic signals. Novel acoustic methods of signal processing used in the system include: 1. Method of precise hydrophone localization. 2. Cross-correlation method for target bearing determination 3. Cross-correlation methods for extraction of target signatures from numerous sources. 4. Feature-based automated diver detection algorithm. 5. Measurements of the ship noise modulation spectrum that is related to propeller and shaft rotation (Detection of Envelope Modulation on Noise — DEMON method). The Stevens Passive Acoustic System has been used in tests in the Hudson River and NY Harbor where a large library of ship acoustic signatures has been collected. Several US Navy sponsored trials demonstrated the ability of the Stevens system for effective diver detection at distances up to 700m.