NDLI: Characterization of the acoustic signature of a small remotely operated vehicle for detection

Content Provider	IEEE Xplore Digital Library
Author	Meng Cai In Mei Sou Layman, C. Bingham, B. Allen, J.
Copyright Year	2010
Description	Author affiliation: Dept. of Mech. Eng., Univ. of Hawaii at Manoa, Honolulu, HI, USA (Meng Cai; In Mei Sou; Layman, C.; Bingham, B.; Allen, J.)
Abstract	We present a characterization of both the hydrodynamic flow associated with the motion of a small remotely operated vehicle (ROV) and the acoustic signature emitted from the ROV. We experimentally measure the acoustic signature of a commercial off-the-shelf mini ROV by recording the underwater sound with stationary hydrophones, simultaneously compared with measuring the flow fields with particle image velocimetry (PIV). By conducting the trials during a variety of ROV maneuvers, we quantify the most underlying mechanisms that generate the ROV acoustic signatures which include the electric motor signal, propeller induced signal, pressure fluctuation due to the propeller wash and emission induced by flow over the ROV body. From the experimental results, we conclude that the electric motor is the main source of acoustic signature. The dominant acoustic frequency is between 70 Hz to 80 Hz with sound pressure level of 146 dB re 1 μPa at 1 m. Based on this characterization, we predict the feasibility of the detection of a small ROV using a model for transmission loss to predict the influences of attenuation and spreading. The predictions of detecting performance are based on a signal-to-noise ratio (SNR) for typical environments: shallow coastal water, ports and harbors, and deep oceans. Based on these models, we can quantify potentially the effective range of passive detection of underwater vehicle in the three distractive environments.
Starting Page	1
Ending Page	7
File Size	1760478
Page Count	7
File Format	PDF
ISBN	9781424443321
DOI	10.1109/OCEANS.2010.5664040
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustics Sonar equipment Propellers Acoustic measurements Measurement by laser beam Propagation losses Semiconductor device measurement
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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