Giant Magnetoresistance Sensors for Electronic Fuzes

Award Information
Agency: Department of Defense
Branch: Army
Contract: N/A
Agency Tracking Number: 41545
Amount: $99,946.00
Phase: Phase I
Program: SBIR
Awards Year: 1998
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
11409 Valley View Rd., Eden Prairie, MN, 55344
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Russell Beech
 (612) 829-9217
Business Contact
Phone: () -
Research Institution
The proposed research program will develop and demonstrate two giant magnetoresistance magnetic sensors for electronic fuzing: one sensor, which will detect gun tube exit of a projectile, will be for safety and arming of a non-spinning projectile, and the other sensor, a spin counter, will count projectile revolutions. Performance goals for the spin count sensor are: 0.02 Oe minimum detectable field, 10 ms recovery after removal of a 1000 Oe disturb field, operation from -50 to +145 F, accuracy of +/- 0.5% out to a target range of 1 km, and signal bandwidth of 500 kHz. The gun tube exit sensor will work with a sensor-to-gun tube gap of up to 2 inches. Both sensors will have CMOS compatible outputs with a +3 to +5 V power supply. The specific technical objectives of this program are to: a) complete a cost and producibility analysis for the proposed magnetic sensors, b) design both gun tube exit detection and spin count sensors which will meet the performance requirements, c) develop performance predictions for the sensors, d) fabricate and test prototypes of both GMR sensors, and e) deliver sensor prototypes for evaluation. The success of this Phase I effort will demonstrate the feasibility of the GMR spin counter and exit sensor, and provide the basis for development of fully integrated versions under a Phase II program. BENEFITS: The GMR spin counter demonstrated in this Phase I program will provide a high output, small size, and low cost alternative to existing spin rate sensors and spin counters in applications ranging from fuzes, motors, automobile engines, and machine tools, to robotics and toys.

* 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
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government