Dynamic Strain and Crack Monitoring Sensor

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NND07AA04C
Agency Tracking Number: 054894
Amount: $556,537.00
Phase: Phase II
Program: SBIR
Awards Year: 2007
Solicitation Year: 2005
Solicitation Topic Code: A2.09
Solicitation Number: N/A
Small Business Information
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
Business Contact
 Anthony O'Keefe
Title: president
Phone: (650) 965-3459
Email: a.okeefe@lgrinc.com
Research Institution
Los Gatos Research proposes to develop a new automated vehicle health monitoring sensor system capable of measuring loads and detecting crack, corrosion, and disbonding in advanced aerospace structures using a novel lock-in laser interrogation technique combined with a Bragg grating array (BGA) technology for strain and guided Lamb wave (GLW) sensing. Los Gatos Research's novel sensor instrumentation offers a number of advantages including sensor compactness (0.2mm x 0.2mm x 10mm), lightweight (few grams), remote data acquisition capability, low-cost, and low power consumption. The inherently reliable lock-in laser demodulation technique permit simultaneous measurements of strain, temperature, and acoustic fields with high resolution and high sensitivity. In Phase I, we have demonstrated feasibility by building a prototype instrument capable of measuring static and dynamic strain, temperature, and ultrasonic waves using a lock-in laser demodulation technique and a fiber Bragg grating array sensor network. In Phase II, LGR will deliver to NASA a rugged, compact, multi-channel instrument optimized for vehicle health monitoring studies including strain, temperature, and crack monitoring with high precision, high resolution, and high sensitivity. This dedicated prototype will include an integrated microcontroller, operate unattended, and address the power and stability requirements unique to in-flight studies.

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

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