Inductance-type displacement sensor for eliminating inaccuracies due to external magnetic fields
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United States of America Patent
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Mar 16, 1993
Grant Date -
N/A
app pub date -
Dec 26, 1990
filing date -
Dec 29, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An inductance-type displacement sensor which can measure the displacement of a measured object of magnetic material without any contact with the object. A pair of series connected coils is provided adjacent to the object so that the inductance of the coils varies in response to a displacement of the object from a predetermined position. The inductance, the number of windings, the direction of the windings and the section of each of the cores are so set that the magnetic flux produced by one of the coils runs in a direction opposite to that of the magnetic flux produced by the other coil and the densities of the respective magnetic fluxes are identical with each other.
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