Inductive displacement sensor

Details Inductive displacement sensor Inductive displacement sensor

1976-03-30

1978-02-21

Rolinec, Rudolph V.

Electricity: measuring and testing

Magnetic

Displacement

336 75, 336 79, 324204, 324236, G01R 3302, H01F 2104

Patent

active

040755517

ABSTRACT:
A variable inductor having a U-shaped magnetic core with a short-circuiting plate providing a short-circuiting ring for both legs of the core movable along the core legs in response to a displacement to be measured is connected in an electronic circuit to generate oscillation of a frequency that is either directly or inversely proportional to the displacement. For the inversely proportional case, the variable inductance component can be combined with an integrator function and connected to an operational amplifier, for generation of the output frequency with a small number of electrical components. The thickness and spacing of the core legs are varied along their length to produce a highly linear inductive transducer characteristic. The core legs are bent in a circle when it is desired to measure an angular displacement.

REFERENCES:
patent: 3479582 (1969-11-01), Meyer
patent: 4013986 (1977-03-01), Weckenmann

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