Magnetic encoder with double Frequency output

Details Magnetic encoder with double Frequency output Magnetic encoder with double Frequency output

2005-05-17

2005-05-17

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207200, C324S207210, C324S207250

Reexamination Certificate

active

06894486

ABSTRACT:
A magnetic sensor has magnetically sensitive element located at a side surface, instead of the bottom surface, of a bias magnet, the magnet being located adjacent a magnetic target wheel, wherein the bias magnet is magnetized parallel to the direction of motion of the teeth/slots of the target wheel. The output may be of a single or double frequency. Sampling of output slope can provide information regarding direction of movement of the target wheel. In a second embodiment the bias magnet is magnetized perpendicular to the movement.

REFERENCES:
patent: 4835467 (1989-05-01), Gokhale
patent: 4926122 (1990-05-01), Schroeder et al.
patent: 4939456 (1990-07-01), Morelli et al.
patent: 6528992 (2003-03-01), Shinjo et al.
patent: 20010045827 (2001-11-01), Shinjo et al.
patent: 20020180427 (2002-12-01), Schroeder et al.

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