Global to push GA events into
skip to main content

Title: Method and apparatus for monitoring armature position in direct-current solenoids

A method for determining the position of an armature of a dc-powered solenoid. Electrical circuitry is provided to introduce a small alternating current flow through the coil. As a result, the impedance and resistance of the solenoid coil can be measured to provide information indicative of the armature's position.
Inventors:
 [1];  [2]
  1. (Oak Ridge, TN)
  2. (Knoxville, TN)
Issue Date:
OSTI Identifier:
870734
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5583434
Application Number:
08/093,846
Contract Number:
AC05-84OR21400
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; monitoring; armature; position; direct-current; solenoids; determining; dc-powered; solenoid; electrical; circuitry; provided; introduce; alternating; current; flow; coil; result; impedance; resistance; measured; provide; information; indicative; electrical circuitry; alternating current; current flow; electrical circuit; provide information; solenoid coil; /324/137/