Position sensor for generating a voltage changing proportionally

Details Position sensor for generating a voltage changing proportionally Position sensor for generating a voltage changing proportionally

1987-02-06

1988-09-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

336110, 34087033, G01B 714, H01F 2100, G08C 1906

Patent

active

047744650

ABSTRACT:
A sensor for identifying the position of a test object has a strip-shaped core of low magnetic coercivity which is magnetized with opposite polarities by two excitation coils disposed at opposite ends of the core, and a secondary coil wrapped around the core between the two excitation coils. The test object generates a magnetic field which saturates the core at a location corresponding to the position of the test object between the two excitation coils, thereby simulating an air gap in the core at this location. The voltage across the terminals of the secondary coil changes in accordance with the position of the simulated air gap, thus providing a signal indicating the position of the test object.

REFERENCES:
patent: 2692357 (1954-10-01), Nilson
"Rugged Heavy Duth Linear Displacement Transducer," Krause, Technisches Messen, vol. 50, No. 10, 1983, pp. 373-378.

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