Inductive position indicator for monitoring the relative positio

Details Inductive position indicator for monitoring the relative positio Inductive position indicator for monitoring the relative positio

1992-04-23

1994-06-21

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

32420722, G01B 714, G01B 730

Patent

active

053231090

ABSTRACT:
An inductive position indicator has an exciter coil for generating a magnetic flux, a measurement coil arrangement, and a flux guide of ferromagnetic material which provides for the magnetic flux a closed measurement path which includes at least one gap, in the region of which the measurement coil arrangement is so positioned that the magnetic flux passing therethrough changes in dependence on the position to be monitored. To improve the fidelity of the characteristic and enhance measurement accuracy, the flux guide provides at least one further closed compensating path which carries the magnetic flux passing therethrough, past the magnetic coil arrangement. When there are two mutually adjacent measurement coils through the surfaces of which the measurement flux can pass in a variable fashion and the output signal difference of which is included in the position signal, the surfaces enclosed by the measurement coils have at least one common edge portion over which the measurement flux can move.

REFERENCES:
patent: 2964716 (1960-12-01), Berman
patent: 3045227 (1962-07-01), Minas
patent: 3732553 (1973-05-01), Hardway, Jr.
patent: 3786459 (1974-01-01), Berger
patent: 4013911 (1977-03-01), Fujiwara et al.
patent: 4695795 (1987-09-01), Nakamizo et al.
patent: 4878020 (1989-10-01), Karna et al.
patent: 5107212 (1992-04-01), Dobler et al.

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