NASA SBIR 2004 Solicitation

FORM B - PROPOSAL SUMMARY


PROPOSAL NUMBER: 04 X4.03-8790
SUBTOPIC TITLE: Inspection and Diagnostics
PROPOSAL TITLE: Multifunctional Integrated Optic Sensor for Detection of Cracks and Corrosion

SMALL BUSINESS CONCERN (Name, E-mail, Mail Address, City/State/Zip, Phone)
Los Gatos Research
67 East Evelyn Avenue, Suite 3
Mountain View, CA 94041-1518
(650)965-7772

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
An-Dien Nguyen
a.d.nguyen@lgrinc.com
67 East Evelyn Avenue, Suite 3
Mountain View, CA 94041-1518
(650)965-3459

TECHNICAL ABSTRACT (LIMIT 200 WORDS)
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.

POTENTIAL NASA COMMERCIAL APPLICATIONS (LIMIT 100 WORDS)
Optical waveguide technology provides significant advantages for advanced aerospace platforms because they are lightweight, immune to electromagnetic wave interference, and do not produce short circuits or ground loops. Therefore the development of integrated optic sensors has the potential to increase reliability, enable lower cost, and facilitate more effective health monitoring and nondestructive evaluation of NASA's advanced aircraft and spacecraft components and systems.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (LIMIT 100 WORDS)
The proposed integrated optic sensors may be applied to a wide range of applications including non-destructive evaluation of structures and components in various industries including commercial aerospace, civil infrastructure, and automotive, and telecommunction.