Differential linear velocity transducer
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United States of America Patent
Stats
-
Apr 7, 1981
Grant Date -
N/A
app pub date -
Mar 28, 1979
filing date -
Mar 28, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A velocity transducer for converting linear mechanical motion to an electrical signal. A stationary permanent magnet is supported within and spaced from an iron pole piece assembly which forms a closed path around the magnet. The pole piece assembly has a pair of linear pole piece segments which extend in parallel on opposite sides of the magnet, spaced apart from the north and south pole faces of the magnet, respectively. A moveable (i.e. slideable) coil is wound around each such linear pole piece. The two coils are series-connected and oppositely wound with respect to the flux produced by the magnet. Noise signals induced in the coils subtract from each other and substantially cancel, but motion-related signals add.
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