Dynamic Strain and Crack Monitoring Sensor

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$69,960.00
Award Year:
2006
Program:
SBIR
Phase:
Phase I
Contract:
NND06AA30C
Award Id:
77778
Agency Tracking Number:
054894
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
The development of condition-based monitoring sensor network systems has the potential to provide an enhanced aircraft safety by real time assessment of the aircraft's structural integrity. Los Gatos Research proposes to develop a structural health monitoring sensor system, capable of simultaneously monitoring dynamic strain and structural damages in aircraft components in real time. Our novel sensor technology offers a number of advantages including compactness (0.2mm x 5mm x 5mm), lightweight (few grams), low cost, and fast response (milliseconds). We achieve this by fabricating Bragg gratings on stress-sensitive polymer planar waveguides on a flexible substrate, which is capable of measuring stress, strain, and temperature, and monitoring damages in advanced material structures. In Phase I, using a DFB laser with a feedback control we will demonstrate the sensor's capability to measure both static and dynamic strain with large dynamic range, high accuracy and high sensitivity. In addition, combing the low-cost laser-based demodulation technique and an acousto-ultrasonic method we will demonstrate the polymer gratings' capability to monitor ultrasonic stress waves indicating the presence and severity of damages in a metal structure, when the structure is probed by an ultrasonic wave generation actuator device.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government