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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:
;
Issue Date:
OSTI Identifier:
6254725
Patent Number(s):
5236011
Application Number:
PPN: US 7-718058
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Resource Relation:
Patent File Date: 20 Jun 1991
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; VALVES; NONDESTRUCTIVE TESTING; ELECTROMAGNETIC FIELDS; MAGNETIC FIELDS; MEASURING INSTRUMENTS; POSITIONING; CONTROL EQUIPMENT; EQUIPMENT; FLOW REGULATORS; MATERIALS TESTING; TESTING; 420500* - Engineering- Materials Testing

Citation Formats

Casada, D A, and Haynes, H D. Noninvasive valve monitor using constant magnetic and/or DC electromagnetic field. United States: N. p., 1993. Web.
Casada, D A, & Haynes, H D. Noninvasive valve monitor using constant magnetic and/or DC electromagnetic field. United States.
Casada, D A, and Haynes, H D. Tue . "Noninvasive valve monitor using constant magnetic and/or DC electromagnetic field". United States.
@article{osti_6254725,
title = {Noninvasive valve monitor using constant magnetic and/or DC electromagnetic field},
author = {Casada, D A and Haynes, H 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 = {8}
}