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Detection of Hidden Substructure Edges and Holes

Award Information

Department of Defense
Office of the Secretary of Defense
Award ID:
Program Year/Program:
1997 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Pacific-sierra Research Corp.
2901 28th St Suite 300 Santa Monica, CA 90405
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 1997
Title: Detection of Hidden Substructure Edges and Holes
Agency / Branch: DOD / OSD
Contract: N/A
Award Amount: $99,986.00


Pacific-Sierra Research Corporation (PSR) proposes to develop a robotic alignment system for aircraft assembly using its non-contact thermographic technology. This automated robotic-thermographic positioning system will be capable of accurately locating and monitoring subsurface holes and edges under exterior panels or skins. The non-contact thermographic system will include a portable high-speed infrared camera with enough spatial resolution, thermal sensitivity, and modern image-processing tools to characterize hidden holes and edges in structural components. This methodology uses a photothermal xenon flashlamp pulse to generate a steep momentary temperature gradient in the material. Subsurface hole regions will restrain the passage of heat, causing the flaw areas to be contrasted against the surroundings when viewed with a thermal imager. The dependence of the transient response on hole and edge locations beneath the surface will be investigated. The temperature history of the surface temperature after the absorption of the short photothermal pulse is used to locate the subsurface holes of the aircraft panels under test. A graphical user interface windowing environment is used to display the entire inspection on a high-resolution monitor; the instrument then, automatically and accurately marks the hole locations with little operator intervention. This robotic-thermographic system will greatly reduce the time and cost associated with examining aircraft structures. A potential Phase III partner has been identified and contacted.

Principal Investigator:

Arnold Daniels

Business Contact:

Small Business Information at Submission:

Pacific-sierra Research Corp.
2901 28th Street, Suite 300 Santa Monica, CA 90405

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No