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Title: Noninvasive valve monitor using constant magnetic and/or DC electromagnetic field

Abstract

One or more sources of steady magnetic field are carefully located on the outside of a valve body. The constant magnetic field is transmitted into the valve body and valve internals. A magnetic field detector carefully located on the outside of the valve body detects the intensity of the magnetic field at its location. As the position of a valve internal part is changed, there is an alteration in the magnetic field in the valve, and a consequent change in the detected magnetic field. Changes in the detected signal provide an indication of the position and motion of the valve internals.

Inventors:
 [1];  [1]
  1. (Knoxville, TN)
Issue Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
868889
Patent Number(s):
5236011
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
noninvasive; valve; monitor; constant; magnetic; dc; electromagnetic; field; sources; steady; carefully; located; outside; transmitted; internals; detector; detects; intensity; location; position; internal; changed; alteration; consequent; change; detected; changes; signal; provide; indication; motion; valve internals; electromagnetic field; magnetic field; detected signal; valve internal; constant magnetic; carefully located; noninvasive valve; valve monitor; field detector; signal provide; /137/324/

Citation Formats

Casada, Donald A., and Haynes, Howard D. Noninvasive valve monitor using constant magnetic and/or DC electromagnetic field. United States: N. p., 1993. Web.
Casada, Donald A., & Haynes, Howard D. Noninvasive valve monitor using constant magnetic and/or DC electromagnetic field. United States.
Casada, Donald A., and Haynes, Howard D. Fri . "Noninvasive valve monitor using constant magnetic and/or DC electromagnetic field". United States. https://www.osti.gov/servlets/purl/868889.
@article{osti_868889,
title = {Noninvasive valve monitor using constant magnetic and/or DC electromagnetic field},
author = {Casada, Donald A. and Haynes, Howard D.},
abstractNote = {One or more sources of steady magnetic field are carefully located on the outside of a valve body. The constant magnetic field is transmitted into the valve body and valve internals. A magnetic field detector carefully located on the outside of the valve body detects the intensity of the magnetic field at its location. As the position of a valve internal part is changed, there is an alteration in the magnetic field in the valve, and a consequent change in the detected magnetic field. Changes in the detected signal provide an indication of the position and motion of the valve internals.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Patent:

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