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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: W31P4Q-09-C-0580
Agency Tracking Number: 09SB1-0184
Amount: $98,746.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: SB091-011
Solicitation Number: 2009.1
Solicitation Year: 2009
Award Year: 2009
Award Start Date (Proposal Award Date): 2009-08-06
Award End Date (Contract End Date): 2010-05-31
Small Business Information
110-1 Clematis Avenue
Waltham, MA 02453
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 will develop rapid 3-D crack models and multivariate inverse methods for crack length, depth and location imaging to provide digital eddy current tomography. JENTEK’s Meandering Winding Magnetometer (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. The JENTEK/DoD team was awarded the 2007 FAA-ATA “Better Way” award for this system. This proposed program will benefit significantly from complementary programs currently funded by Chevron and USDOT. These three year programs, focused on inspecting pipelines through coatings and insulation, will address some of the obstacles that must be surmounted to achieve digital EC tomography, such as the large stand-off distance, while this proposed program focuses on crack and flaw modeling and imaging.

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

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