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Absolute position measuring device | Absolutes Positionsmesssystem | Dispositif de mesure de la position absolue

Patentnummer:EP1327862B1
IPC Hauptklasse:G01B000730
Anmelder:Mitutoyo Corporation (0)
20-1, Sakado 1-chome, ; Takatsu-ku, ; Kawasaki, Kanagawa 213-0012, JP
Erfinder:Sasaki, Kouji (0)
; c/o Mitutoyo Corp., 20-1, Sakado 1-chome, ; Takatsu-ku, Kawasaki-shi, ; Kanagawa 213-8533, JP
Anmeldung:10.01.03
Offenlegung:11.01.02
Patenterteilung:13.12.17

Abstract / Hauptanspruch
The absolute position measuring device comprises a main body, a spindle provided movably in the main body, two sets of rotary encoders, an arithmetical operation section, and a display section. The rotary encoders originate two phase signals of different periods in accordance with the amount of movement of the spindle. The arithmetical operation section makes arithmetical operation on the phase signal to obtain the absolute position of the spindle. The display section displays the absolute position in digital format. The two phase signals have a different phase difference at a different position of the spindle. The arithmetical operation section comprises phase signal processing section for comparing the two phase signals to obtain a phase difference between the phase signals, and absolute position calculating section for calculating the absolute position of the spindle from the phase difference obtained by the phase signal processing section.

EP1327862B1


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