Multifunctional Integrated Optic Sensor for Detection of Cracks and Corrosion

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNL05AA90P
Agency Tracking Number: 041213
Amount: $69,995.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: 2004
Solicitation Topic Code: X4.03
Solicitation Number: N/A
Small Business Information
Los Gatos Research
67 East Evelyn Avenue, Suite 3, Mountain View, CA, 94041-1518
DUNS: 928805761
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 An-Dien Nguyen
 Principal Investigator
 (650) 965-3459
 a.d.nguyen@lgrinc.com
Business Contact
 Anthony O'Keefe
Title: president
Phone: (650) 965-7772
Email: a.okeefe@lgrinc.com
Research Institution
N/A
Abstract
Los Gatos Research proposes to develop a new nondestructive inspection sensor system, capable of simultaneously measuring strain-based load and detecting crack, corrosion, and disbonding in inaccessible areas of aerospace structures. Our novel sensor technology offers a number of advantages including compactness, lightweight, low power consumption, and high sensitivity. We achieve this by fabricating Bragg gratings on stress-wave-sensitive polymer planar waveguides, which is capable of detecting both surface and below surface cracks and stress in aerospace structures. In Phase I, using a guided wave method we will demonstrate the polymer gratings' capability to measure strain and stress waves indicating the presence and severity of damages caused by cracks, disbonding, or corrosion in a thin metal structure, when the structure is probed by a conventional ultrasonic wave generation device. In Phase II, an integrated optic Bragg grating-based load monitoring and guided wave sensor prototype and a crack detection algorithm will be developed to provide structural health monitoring and nondestructive evaluation for spacecraft composite systems and components.

* information listed above is at the time of submission.

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