Miniature magnetic sensor device using an inductor device

A magnetic sensor device comprising a magnetic element and a wire wound around the magnetic element. The magnetic element has a cross-sectional area of not more than 0.55 mm2 and a saturation magnetostriction constant lambda s whose absolute value is smaller than 1x10-6, with Sw/Sm being equal to or...

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Bibliographic Details
Main Authors FURUKAWA; SHINJI, UENO; SHUJI, BUSHIDA; KENICHI, OGASAWARA; ISAMU
Format Patent
LanguageEnglish
Published 28.11.2000
Edition7
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:A magnetic sensor device comprising a magnetic element and a wire wound around the magnetic element. The magnetic element has a cross-sectional area of not more than 0.55 mm2 and a saturation magnetostriction constant lambda s whose absolute value is smaller than 1x10-6, with Sw/Sm being equal to or smaller than 9, provided that Sw is the cross-sectional area of the wire and Sm is the cross-sectional area of the magnetic element. Preferably, the magnetic element has an elastic limit sigma m greater than 1,000 MPa, and the elongation the magnetic element experiences upon application of a stress equal to the elastic limit sigma m is between 1.0% and 5.0%. It is also preferable that the magnetic element and the wire are covered with a resin layer to form an integral unit.
Bibliography:Application Number: US19980192334