NASA SBIR 01-II Solicitation

FORM 9B - PROPOSAL SUMMARY


PROPOSAL NUMBER: A1.05-8767 (For NASA Use Only - Chron: 013232 )
PHASE-I CONTRACT: NAS1-02022
PROPOSAL TITLE: Shaped Field Giant Magnetoresistive Sensor Arrays for Materials Testing

TECHNICAL ABSTRACT (LIMIT 200 WORDS)
Shaped field Giant Magnetoresistive Sensor Arrays offer substantially increased depth of sensitivity and potential to provide 3-dimensional absolute property imaging for conducting and magnetic media. The Phase I demonstrated the capability of Meandering Winding Magnetometer (MWM) drive winding constructs with GMR sensing elements to (1) detect and image 3% material loss in a 0.25 inch thick aluminum plate, (2) detect corrosion damage in a military aircraft component, (3) use a forward model of the sensor interactions with layered media to calibrate in ?air,? without standards, and accurately measure absolute electrical conductivity and layer thickness, (4) measure and monitor temperature variations for an aluminum plate through another 0.25 inch aluminum plate with an additional 0.5 inch air gap between plates, (5) independently measure variations in stress (i.e., through its relationship with magnetic permeability) on a steel plate through a 0.25 inch aluminum plate and variations in an approximately 0.12 inch air gap between plates, and to (6) operate a three channel GMR-MWM sensor array with JENTEK?s commercial impedance instrumentation. These demonstrations completely satisfied the Phase I objectives. The proposed Phase II effort will develop conformable MWM-Arrays with GMR sensing elements and distributed winding designs for imaging hidden damage and geometric features.

POTENTIAL COMMERCIAL APPLICATIONS
There are substantial commercial applications for this capability including replacing X-Ray and UT for inspection of metal structures less than 0.5 inches in thickness for corrosion, fatigue and geometric feature imaging stress measurement for ferrous alloys, and weld inspection (e.g., the friction stir welds on the space shuttle tanks, gun barrel inspection, and even buried unexploded ordnance and landmine detection). The proposed Phase II effort will extend the current capability and substantially broaden JENTEK?s addressable markets. JENTEK plans to provide matching funds for Phase II and III. This match will focus on development of key components for planned commercial versions of GMR-MWM-Array products.

NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR (Name, Organization Name, Mail Address, City/State/Zip)
Neil Goldfine
JENTEK Sensors, Inc.
110-1 Clematis Avenue
Waltham , MA   02453 - 7013

NAME AND ADDRESS OF OFFEROR (Firm Name, Mail Address, City/State/Zip)
JENTEK Sensors, Inc.
110-1 Clematis Avenue
Waltham , MA   02453 - 7013


Form Printed on 05-09-02 16:37