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Digital Eddy Current Tomography for Submarine Pressure Hull Inspection Through the Coating

Award Information
Agency: Department of Defense
Branch: Defense Advanced Research Projects Agency
Contract: W91CRB-11-C-0070
Agency Tracking Number: 09SB1-0184
Amount: $1,124,930.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: SB091-011
Solicitation Number: 2009.1
Solicitation Year: 2009
Award Year: 2011
Award Start Date (Proposal Award Date): 2011-04-01
Award End Date (Contract End Date): 2013-04-01
Small Business Information
110-1 Clematis Avenue
Waltham, MA -
United States
DUNS: 018791827
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Darrell Schlicker
 Principal Investigator
 (781) 642-9666
Business Contact
 Joni Hatem
Title: Sr. Vice President
Phone: (781) 642-9666
Research Institution

A capability to inspect submarine pressure hulls through the special hull treatment could result in significant savings in maintenance costs and improvements in fleet readiness. This poses a challenge for conventional nondestructive evaluation (NDE) methods, as acoustic methods are defeated by the coating and others require access to the surface. This proposal focuses on evolving MWM-MR-Array (Meandering Winding Magnetometer-Magnetoresistive) technology for application to the thick structure typical of submarine hulls by completing advancements in both sensor and instrumentation initiated under the Phase I effort. In addition, hull-like samples ranging from simplistic plates to panels with welded structure will be used to develop and evaluate detection and characterization capabilities of introduced flaws. Flaw characterization methods based on 3-D models and multivariate inverse methods will be used to enable digital eddy current tomography. JENTEK's MWM-Arrays have delivered superior performance for a variety of NDE tasks. JENTEK's engine component inspection systems, for example, in use by NAVAIR at several depots, have been called the"gold standard"due to their capability to detect flaws in hard-to-inspect areas missed by other NDE methods. This proposed effort will benefit from complementary programs, funded by Chevron and USDOT, focusing on inspecting pipelines through coatings and insulation.

* Information listed above is at the time of submission. *

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