Differential linear velocity transducer

Details Differential linear velocity transducer Differential linear velocity transducer

G - Physics

11

B

352/21.3

G11B 21/02 (2006.01) G01P 3/52 (2006.01) G11B 5/55 (2006.01) H02K 33/18 (2006.01)

Patent

CA 1143471

Abstract of the Disclosure 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 movable (i.e. slidable) coil is wound around each such linear pole piece. The two coils are series-connected and oppositely wound with respect to the flux pro- duced 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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