Magnetic angular position sensor with two magnetically sensitive

Details Magnetic angular position sensor with two magnetically sensitive Magnetic angular position sensor with two magnetically sensitive

1993-03-18

1995-08-22

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420725, 123617, G01B 730, G01B 714, G01P 344, F02P 1700

Patent

active

054443709

ABSTRACT:
A magnetic sensor is provided with two target tracks arranged in generally parallel association with each other. Each of the target tracks comprises magnetic and nonmagnetic segments which are arranged in alternating patterns. Each magnetic segment of the first target track is disposed alongside a nonmagnetic segment of the second target track and each magnetic segment of the second target track is disposed alongside a nonmagnetic segment of the first target track. First and second magnetically sensitive components are disposed proximate the first and second target tracks, respectively, and a source of a magnetic field is disposed proximate the first and second magnetically sensitive components. Distortions of the magnetic field imposed perpendicularly on the first and second magnetically sensitive components are used to provide first and second output signals therefrom. A third output signal, which is a function of the first and second output signals, is used to determine the location of the first and second target tracks with respect to the first and second magnetically sensitive components. The magnetic and nonmagnetic segments of the first and second target tracks can be different sizes and arranged in a pattern which permits the specific and absolute location of a moveable object to be determined.

REFERENCES:
patent: 4518918 (1985-05-01), Auery
patent: 4786870 (1988-11-01), Kawamata et al.
patent: 4833405 (1989-05-01), Richards et al.
patent: 5140262 (1992-08-01), Stolfus
patent: 5159268 (1992-10-01), Wu
patent: 5164668 (1992-11-01), Alfors

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