H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/76, 340/135.
H03M 1/00 (2006.01) G01D 5/16 (2006.01) G01D 5/244 (2006.01) G01D 5/245 (2006.01) G01P 3/487 (2006.01)
Patent
CA 1137189
ABSTRACT A magnetic rotary encoder comprises a drum mounted on a rotatable shaft and carrying on its periphery permanent magnets which produce a varying magnetic field as the drum rotates. A magnetic flux detector including a magneto-resistor is arranged in the vicinity of the drum vicinity so that an analog signal representative of the resistance change of the magneto-resistor is generated in response to the varying magnetic field. A rotary condition detector is connected electrically to the mag- netic flux detector and produces digital or analog signals indicative of the rotary information, such as incremental angu- lar distance and velocity, corresponding to the shaft. The permanent magnets are preferably contiguous and each has an opposite direction of magnetization with respect to the adjacent ones.
322369
Ito Susumu
Morita Keizo
Nagao Morimasa
Toki Kaoru
Nippon Electric Co. Ltd.
Smart & Biggar
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