Differential transformer for detecting the displacement of a pro

Details Differential transformer for detecting the displacement of a pro Differential transformer for detecting the displacement of a pro

1988-07-25

1990-01-23

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

34087031, 33558, G01B 714, G08C 1906, G08C 1912

Patent

active

048961108

ABSTRACT:
In a length measuring apparatus, a measurement probe includes a core and is movable in an axial direction of the probe. First to third coils are arranged in an order in a moving area of the core in accordance with the movement of the probe. In the B-phase, the first and second coils are primary and the second and third coils are secondary. In the A-phase, the second and third coils are primary and the first and second coils are secondary. CPU first sets a switch in the B-phase and then in the A-phase. A moving amount of the core is calculated from secondary voltage data in both the B-phase and the A-phase.

REFERENCES:
patent: 4651130 (1987-03-01), Pennell

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