Magnetic sensor using magnetic impedance of magnetic wire within biasing coil
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United States of America Patent
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Sep 19, 2000
Grant Date -
N/A
app pub date -
Jun 19, 1998
filing date -
Jul 14, 1997
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Expired
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Abstract
In a magnetic impedance device according to the present invention, an approximately uniformly biased magnetic field is applied to a sensing part of a magnetic wire in a longitudinal direction by setting the range of winding of a coil. The sensing part is composed of magnetic material with high permeability and is disposed between a pair of mounting pins. The coil is wound around the sensing part of the magnetic wire and generates a biasing magnetic field. The range of winding of the coil is longer than the sensing part. This arrangement allows the sensing part of the magnetic wire to detect external magnetic fields without problems caused by edge effects from the ends of the coil, thereby enhancing the precision of detection.
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