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A one-dimension position encoder | Eindimensionaler Positionscodierer | Codeur de position unidimensionnel

Patentnummer:EP2423645B1
IPC Hauptklasse:G01D0005244
Anmelder:
Erfinder:FRANZI, Edoardo (0)
Rue du Lac 20, CH-1400 Yverdon-les-Bains, CH
HASLER, David (0)
Matile 51, CH-2000 Neuchâtel, CH
HEIM, Pascal (0)
Rue du Castel 34, CH-2024 Saint-Aubin, CH
MASA, Peter (0)
Crêt du Jura 3, CH-2208 Les Hauts-Geneveys, CH
Anmeldung:03.04.09
Offenlegung:03.04.09
Patenterteilung:18.07.18

Abstract / Hauptanspruch
The present invention discloses a one-dimension position measurement system comprising:
- a first ruler, on which is applied a first one-dimension code,
- a second ruler, on which is applied a second one-dimension code,
- a camera for acquiring simultaneously a picture of a portion of the first one-dimension code and of a portion of the second one-dimension code, and
- some processing means.

According to the invention, the second ruler is disposed parallel to the first ruler, one end of said first ruler being tied to one end of said second ruler, the other end of said first and second rulers being free. Moreover, said first and second rulers are made of material having different temperature expansion coefficients.

EP2423645B1


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