Method for contactless digital measuring of the displacement or position of a movable piece
AssigneeVibro-Meter SA
InventorsFelix Schmid, Heinrich K. Feichtinger
Life of this patent
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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.
Claims15
A method for the manufacture of a device for contactless and digital measurement of a linear or angular condition of a first piece with respect to a second piece comprising the steps of:
- providing one of said first and second pieces as a substrate of austenitic steel;
- stabilizing said substrate of austenitic steel by incorporating therein a metalloid which is in interstitial solution in the substrate, thereby providing a stabilized substrate;
- and
- producing a ferromagnetic encoding pattern in said stabilized substrate of austenitic steel, said ferromagnetic encoding pattern being detectable by magnetic read means, the step of producing said ferromagnetic encoding pattern comprising locally surface heating a portion of the stabilized substrate of austenitic steel according to a desired encoding pattern.
Dependencies are inferred from the claim text.