BONDING DEFECT DETECTION AND IMAGING USING DRUMS™

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Authors
  1. Koptenko, S.V.
  2. Guigne, J.Y.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Guigne International Ltd, Paradise NFLD (CAN)
Abstract
The objective of this study was to determine if the advanced sonar approach known as "DRUMS™" (Dynamically Responding Underwater Matrix Sonar) was capable of detecting corrosion and adhesion defects for elastomeric tiles bonded to steel substrates. DRUMS™, a technology developed by Guigne International Ltd., consists of a matrix of parametric array transducers, a parallel array of receivers, and intelligent control software and hardware. The DRUMS™ system has been used to non-destructively image and characterise benthic fauna on the ocean floor in situ. The sample plates presented for analysis involved one bare steel plate with various defects including corrosion three "known" rubber-steel plates with maps and descriptions of defects, and four "blind" specimens where defects were to be detected without prior knowledge. Results of the data analysis confirmed that the delamination type of defects were detectable and capable of being identified by the DRUMS™ technology. The corrosion type of defect was also detected for the bare plate and for the rubber-coated plates, as well as when air bubbles were trapped under the rubber. In addition to in situ scanning of ship or submarine surfaces coated with elastomeric materials, DRUMS™ imaging technology may possibly be utilized for quality control checks during the bonding process of rubber tiles to steel substrates.
Keywords
Defect analysis;DRIMS (Dynamically responding underwater matrix sonar)
Report Number
DREA-CR-96-431 — Contractor Report
Date of publication
01 Jan 1997
Number of Pages
122
DSTKIM No
97-03151
CANDIS No
503110
Format(s):
Hardcopy;Document Image stored on Optical Disk

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