Multifunctional Integrated Optic Sensor for Detection of Cracks and Corrosion

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$69,995.00
Award Year:
2005
Program:
SBIR
Phase:
Phase I
Contract:
NNL05AA90P
Award Id:
76826
Agency Tracking Number:
041213
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
67 East Evelyn Avenue, Suite 3, Mountain View, CA, 94041
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
928805761
Principal Investigator:
An-DienNguyen
Principal Investigator
(650) 965-3459
a.d.nguyen@lgrinc.com
Business Contact:
AnthonyO'Keefe
president
(650) 965-7772
a.okeefe@lgrinc.com
Research Institute:
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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