Actuators and moveable elements with position sensing

Details Actuators and moveable elements with position sensing Actuators and moveable elements with position sensing

2006-11-02

2010-12-07

LeDynh, Bot L (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C324S207170, C324S207240

Reexamination Certificate

active

07847541

ABSTRACT:
A system senses the position of a movable element in a mechanical apparatus. The element moves along an elongated guide member, which is at least partially formed of a magnetic material. An excitation coil is positioned by the guide member and a sensing coil moves with the movable element. An excitation circuit energizes the excitation coil and a position sensing circuit sense a voltage or current in the sensing coil to determine the distance between the coils.

REFERENCES:
patent: 2003/0213355 (2003-11-01), Meisel
“Linear variable differential transformer,” printed from the Wikipedia website (http://en.wikipedia.org/wiki/Linear—variable—differential—transformer) and believed to have been offered for sale, publicly used, and/or published prior to the filing date of this application.

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