Sensor for measuring magnetic field changes
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United States of America Patent
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Oct 21, 1980
Issued Date -
N/A
app pub date -
Aug 25, 1978
filing date -
Oct 12, 1976
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sensor for measuring the change of a magnetic field comprises a magnet for generating a constant magnetic flux, and magnetically conductive members magnetically coupled to the magnet for producing first and second magnetic fields, the first magnetic field passing through an object and the second magnetic field not passing through said object, the object being of a material which influences the first magnetic field. A magnetic field measuring device located in the second magnetic field to measure the second magnetic field and to indicate a change in the second magnetic field as a result of the first magnetic field being influenced by the object. A magnetically conductive outer shielding member, which may be one of the magnetically conductive members, is provided.
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