Electricity: measuring and testing – Magnetic – Displacement
Patent
1998-04-14
2000-08-01
Patidar, Jay
Electricity: measuring and testing
Magnetic
Displacement
207220721, 207220724, 207220725, G01B 700, G01R 33025
Patent
active
060971835
ABSTRACT:
A position determining apparatus including a magnet that is attached to a movable member which moves along a predefined path of finite length. An array of magnetic field transducers are located adjacent to the predefined path. The transducers provide a bipolar output signal as the magnet approaches, passes and moves away from each transducer. A correction mechanism is provided to correct for residual error caused by the non-linearity of the transducers. The correction mechanism preferably approximates the residual error with a predetermined function, and applies correction factors that correspond to the predetermined function to offset the residual error. By correcting for the non-linearity of the transducers, the length of the magnet may be reduced and/or the spacing of the transducers may be reduced.
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Goetz Jay R.
Rhodes Michael L.
Fredrick Kris T.
Honeywell International , Inc.
Patidar Jay
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