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Title: Noninvasive valve monitor using alternating electromagnetic field

Abstract

One or more electrical coils are carefully located on the outside of a valve body. An alternating current passing through the coil(s) results in an alternating electromagnetic field being transmitted into the valve body and valve internals. The electromagnetic field varies in intensity and polarity in the valve. As the position of a valve internal part is changed, the electromagnetic field throughout the valve body and its internals is altered. A passive receiver coil carefully located on the outside of the valve body detects the intensity of the electromagnetic field at that location as an induced electrical voltage in the coil. With the change in position of the valve internal part, there is a corresponding change in the induced voltage as a result of the alteration in the alternating electromagnetic field at that location. Changes in the voltage provide an indication of the position and motion of valve internals.

Inventors:
 [1];  [2];  [2]
  1. Oak Ridge, TN
  2. Knoxville, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
868694
Patent Number(s):
5193568
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16K - VALVES
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
noninvasive; valve; monitor; alternating; electromagnetic; field; electrical; coils; carefully; located; outside; current; passing; coil; results; transmitted; internals; varies; intensity; polarity; position; internal; changed; throughout; altered; passive; receiver; detects; location; induced; voltage; change; corresponding; result; alteration; changes; provide; indication; motion; alternating electromagnetic; valve internals; electromagnetic field; magnetic field; alternating current; valve internal; current passing; electrical coils; corresponding change; carefully located; noninvasive valve; field throughout; valve monitor; induced electrical; voltage provide; electrical coil; current pass; /137/324/

Citation Formats

Eissenberg, David M, Haynes, Howard D, and Casada, Donald A. Noninvasive valve monitor using alternating electromagnetic field. United States: N. p., 1993. Web.
Eissenberg, David M, Haynes, Howard D, & Casada, Donald A. Noninvasive valve monitor using alternating electromagnetic field. United States.
Eissenberg, David M, Haynes, Howard D, and Casada, Donald A. Fri . "Noninvasive valve monitor using alternating electromagnetic field". United States. https://www.osti.gov/servlets/purl/868694.
@article{osti_868694,
title = {Noninvasive valve monitor using alternating electromagnetic field},
author = {Eissenberg, David M and Haynes, Howard D and Casada, Donald A},
abstractNote = {One or more electrical coils are carefully located on the outside of a valve body. An alternating current passing through the coil(s) results in an alternating electromagnetic field being transmitted into the valve body and valve internals. The electromagnetic field varies in intensity and polarity in the valve. As the position of a valve internal part is changed, the electromagnetic field throughout the valve body and its internals is altered. A passive receiver coil carefully located on the outside of the valve body detects the intensity of the electromagnetic field at that location as an induced electrical voltage in the coil. With the change in position of the valve internal part, there is a corresponding change in the induced voltage as a result of the alteration in the alternating electromagnetic field at that location. Changes in the voltage provide an indication of the position and motion of valve internals.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Patent:

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