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POSITION DETECTING DEVICE | POSITIONSBESTIMMUNGSVORRICHTUNG | DISPOSITIF DE DETECTION DE POSITION

Patentnummer:EP2955487B1
IPC Hauptklasse:G01D000514
Anmelder:
Erfinder:Kusumi, Masaaki (0)
Sony Precision Techn. Inc., ; 9-17, Nishigotanda, 3-chome, ; Shingawa-ku, ; Tokyo, JP
Anmeldung:08.06.15
Offenlegung:09.06.14
Patenterteilung:21.11.18

Abstract / Hauptanspruch
A highly accurate position detection is performed by the use of a magneto-resistance effect element such as a TMR element.

At least two magnetic detecting elements 21-1 and 21-2 are provided to detect leakage magnetism from a scale 11 having a magnetic signal magnetically recorded thereon, and to output a recording signal of a position where the leakage magnetism is detected. The at least two magnetic detecting elements 21-1 and 21-2 are disposed side by side in a direction y perpendicular to a direction x of scanning the scale 11 and also disposed at positions approximately equidistant from a magnetic signal recording surface of the scale 11.

EP2955487B1


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