Method for contactless digital measuring of the displacement or

Details Method for contactless digital measuring of the displacement or Method for contactless digital measuring of the displacement or

1991-07-15

1992-12-29

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148509, C23C 1006

Patent

active

051748320

ABSTRACT:
A method for manufacturing a device for contactless and digital measurement of a linear or angular condition of a first piece with respect to a second piece. A series of ferromagnetic encoding marks are provided onto a non-magnetic substrate of one of the pieces. The encoding marks are produced by a strongly local heating of the surface of a non-magnetic substrate of an austenitic steel stabilized by a metalloid in interstitial solution. Displacement, speed and acceleration of a linear or angular kind of one piece with respect to a second piece can thereby be measured with great accuracy.

REFERENCES:
patent: 4514236 (1985-04-01), Cook et al.
patent: 4610734 (1986-09-01), Hartwig et al.

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