Sensor with magnetoresistors disposed on a plane which is parall

Details Sensor with magnetoresistors disposed on a plane which is parall Sensor with magnetoresistors disposed on a plane which is parall

1994-01-11

1995-12-19

O'Shea, Sandra L.

Electricity: measuring and testing

Magnetic

Displacement

324252, 338 32R, G01B 714, G01R 33022

Patent

active

054771439

ABSTRACT:
A proximity sensor has two magnetoresistive elements in a common plane and displaced from a lateral surface of a permanent magnet. The common sensing plane of the magnetoresistive elements extends in a direction generally parallel to a magnetic axis of a permanent magnet that extends between the north and south poles of the magnet. A detection zone is defined relative to a preselected magnetic pole face and the magnetoresistive elements provide first and second signals that can be compared to define a third signal which is representative of the presence or absence of the magnetically permeable object within the detection zone. The magnetoresistive elements can each have a plurality of magnetoresistors which are arranged in a Wheatstone bridge configuration for the purpose of providing the first and second signals described above.

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