Inductive displacement sensor
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United States of America Patent
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Jun 13, 2017
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app pub date -
Apr 28, 2015
filing date -
Apr 28, 2014
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Abstract
Inductive displacement sensors and methods of using them may be useful in a variety of contexts. For example, systems for precisely measuring linear or angular motion may use inductive displacement sensors to measure changes in position. An apparatus, such as a sensor, can include a primary inductor. The apparatus can also include a first secondary inductor that is field-coupled to the primary inductor. The apparatus can further include a second secondary inductor that is field-coupled to the primary inductor. The first secondary inductor and the second secondary inductor can be configured as coordinated inductors to detect motion of a coupler. The coordinated inductors can be configured to provide a reference signal and a measurement signal, wherein the reference signal has a constant amplitude across a range of motion of the coupler.
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