Speed detecting apparatus including a multi-coil device

Details Speed detecting apparatus including a multi-coil device Speed detecting apparatus including a multi-coil device

1988-10-07

1990-03-06

Shoop, Jr., William M.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324163, 360 7806, 369239, 369221, G01P 346

Patent

active

049069233

ABSTRACT:
Apparatus for detecting the speed of a moving object when exposed to primary magnetic flux fields and secondary external magnetic flux fields. The apparatus includes a magnetic device which generates the primary magnetic flux fields, a multi-coil device which carries induced electric currents when exposed to the primary magnetic flux field, and an error correction circuit for offsetting the effect of the magnetic flux from the external magnetic flux sources on the induced electric current. A support device is positioned between the multi-coil device and the magnetic device to allow relative movement therebetween, corresponding to the movement of the object.

REFERENCES:
patent: 3440532 (1969-04-01), Chung
patent: 3755745 (1973-08-01), Sapir
patent: 4161693 (1979-07-01), Carlson
patent: 4462096 (1984-07-01), Kusaka
patent: 4518882 (1985-05-01), Morino et al.
patent: 4544890 (1985-10-01), Albert
patent: 4622516 (1986-11-01), Hearn et al.
Abstract of Japanese Patent Document No. AP-A-61258661 Published Nov. 17, 1986.

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