Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Specified electrical sensor or system
Patent
1991-11-01
1992-12-08
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Specified electrical sensor or system
7386269, G01B 724
Patent
active
051687607
ABSTRACT:
A strain gauge comprised of a magnetic multilayer assembly exhibiting spialve effect with individual ferromagnetic layers possessing magnetostrictive properties. A magnetic field source is used to bias the magnetic moments of the ferromagnetic layers in a given direction whereby stress applied causes previously antiferromagnetically coupled moments to be angularly realigned toward a ferromagnetic arrangement. Such realignment causes a corresponding resistance change of unexpectedly high magnitude thereby providing a highly sensitive strain gauge.
REFERENCES:
patent: 4979395 (1990-12-01), Pratt
Clark Arthur E.
Hathaway Kristl B.
Wun-Fogle Marilyn
Myracle Jerry W.
Shuster Jacob
The United States of America as represented by the Secretary of
Walden Kenneth E.
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