Magnetic stroke sensor for detecting the stroke of a fluid-power

Details Magnetic stroke sensor for detecting the stroke of a fluid-power Magnetic stroke sensor for detecting the stroke of a fluid-power

1987-12-09

1989-06-13

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

92 5R, G01B 714, F01B 2526, F01B 3112

Patent

active

048395919

ABSTRACT:
A method for easy and accurate positioning of a magnetic sensor in a fluid-power cylinder facing a magnetic scale on the lateral surface of a piston rod, wherein the sensor is supported by a hole in the cylinder, a piece of friction-resistant, non-magnetic material attached to the sensor projects from its detection surface towards the piston rod, and the non-magnetic material is made to keep in touch with the lateral surface of the moving piston rod by a pressure-applying bias. The friction-resistant, non-magnetic material is either fitted to the magnetic detection surface, or is formed into a tubular shape and fitted to the outer circumference of the sensor.

REFERENCES:
patent: 3716121 (1923-02-01), Frigger
patent: 4161120 (1979-07-01), Cloarce
patent: 4549469 (1985-10-01), Plester et al.

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