An experimental investigation of the performance of a new wideband, directional receiver/transmitter sonar system

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Authors
  1. Fawcett, J.
  2. Fleming, R.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
In this report, we describe a wideband projector/4-element receiver sonar system that we constructed. The wideband projector was a medium frequency multi-mode pipe projector and four wideband; rectangular 1-3 piezocomposite hydrophones were used as receive elements. The combined projector/receiver system has a combined beamwidth of about 2 degrees at a frequency of 45 kHz. The directional characteristics depend significantly upon the frequency. Measurements of the projector’s transmit voltage response (TVR) curves and the projector’s and receive elements’ beampatterns were carried out at the DRDC Atlantic barge facility and are described. This wideband system was tested in the DRDC Atlantic acoustic calibration tank and at the barge in a series of target-scattering detection/classification experiments that are described. In particular, one of the targets was a small aluminum-shelled float. A hole was drilled into the float that allowed different materials to be placed within and it was found that these resulting objects could be discriminated based on their echo. Finally, we conclude with a discussion of some of the problems that were encountered and future work.

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Report Number
DRDC-ATLANTIC-TM-2009-174 — Technical Memorandum
Date of publication
01 Aug 2009
Number of Pages
42
DSTKIM No
CA033582
CANDIS No
532937
Format(s):
Electronic Document(PDF)

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