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Electromagnetic method and apparatus for the measurement of linear position

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Title: Electromagnetic method and apparatus for the measurement of linear position.
Abstract: A method and apparatus are disclosed for monitoring a linear position, such as the distance between a sensing element and a movable object, and/or related parameters, such as displacement, direction, speed, velocity, and/or acceleration. The method utilizes a sensing element and an electrically conductive portion of the movable object, or a conductive target coupled to the movable object. The apparatus includes at least one sensing element formed by a section of a coupled slow-wave structure. The sensing element is connected to an RF or microwave generator, and an electronic circuit that converts at least one electromagnetic parameter of the section of the coupled slow-wave structure into a position reading. Electric and magnetic fields excited in the sensing element are split so that most of the electric energy is concentrated inside of the sensing element, while most of the magnetic energy is concentrated outside of the sensing element. The distance that defines the linear position is measured as a resonant frequency, impedance, phase shift or other electromagnetic parameter. ...


- Apex, NC, US
Inventors: Yuriy Nikitich Pchelnikov, David Scott Nyce
USPTO Applicaton #: #20070088527 - Class: 702150000 (USPTO) - 04/19/07 - Class 702 


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Related Patent Categories: Data Processing: Measuring, Calibrating, Or Testing, Measurement System, Orientation Or Position
The Patent Description & Claims data below is from USPTO Patent Application 20070088527, Electromagnetic method and apparatus for the measurement of linear position.

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stats Patent Info
Application #
US 20070088527 A1
Publish Date
04/19/2007
Document #
11253315
File Date
10/19/2005
USPTO Class
702150000
Other USPTO Classes
International Class
01C17/00
Drawings
9



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