Electricity: measuring and testing – Magnetic – Displacement
Patent
1989-03-31
1990-05-15
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Displacement
29605, 324225, 324234, 32420717, 336 45, 336136, G01B 714, H01F 2106
Patent
active
049261231
ABSTRACT:
A compensation winding for improving the linearity of a displacement transducer. The displacement transducer is the type having an electrically conducting non-ferromagnetic wall which moves in telescoping relation with the coil and is excited by a signal at a sufficiently high frequency that skin effect on the wall permits displacement of the wall to vary the reluctance of the coil flux path and thereby vary its inductance proportionally to displacement of the wall. The compensation winding is wound in telescoped, coaxial relationship to the coil in a fixed position. The compensation winding has a pitch which is a decreasing function of the distance from the end of the coil which is nearest the wall when the wall and the coil are in their least overlapping relationship.
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Foster Frank H.
Strecker Gerard R.
Sunpower, Inc.
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