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Title: Eddy current gauge for monitoring displacement using printed circuit coil

Abstract

A proximity detection system for non-contact displacement and proximity measurement of static or dynamic metallic or conductive surfaces is provided wherein the measurement is obtained by monitoring the change in impedance of a flat, generally spiral-wound, printed circuit coil which is excited by a constant current, constant frequency source. The change in impedance, which is detected as a corresponding change in voltage across the coil, is related to the eddy current losses in the distant conductive material target. The arrangement provides for considerable linear displacement range with increased accuracies, stability, and sensitivity over the entire range.

Inventors:
 [1]
  1. (Dover, NJ)
Publication Date:
OSTI Identifier:
862902
Patent Number(s):
US 4042876
Assignee:
United States of America as represented by United States Energy (Washington, DC)
DOE Contract Number:  
AT(40-1)-3685
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
eddy; current; gauge; monitoring; displacement; printed; circuit; coil; proximity; detection; non-contact; measurement; static; dynamic; metallic; conductive; surfaces; provided; obtained; change; impedance; flat; spiral-wound; excited; constant; frequency; source; detected; corresponding; voltage; related; losses; distant; material; target; arrangement; provides; considerable; linear; range; increased; accuracies; stability; sensitivity; entire; conductive surfaces; linear displacement; constant current; arrangement provides; eddy current; conductive material; printed circuit; frequency source; corresponding change; proximity detection; entire range; conductive surface; /324/

Citation Formats

Visioli, Jr., Armando J. Eddy current gauge for monitoring displacement using printed circuit coil. United States: N. p., 1977. Web.
Visioli, Jr., Armando J. Eddy current gauge for monitoring displacement using printed circuit coil. United States.
Visioli, Jr., Armando J. Sat . "Eddy current gauge for monitoring displacement using printed circuit coil". United States. https://www.osti.gov/servlets/purl/862902.
@article{osti_862902,
title = {Eddy current gauge for monitoring displacement using printed circuit coil},
author = {Visioli, Jr., Armando J.},
abstractNote = {A proximity detection system for non-contact displacement and proximity measurement of static or dynamic metallic or conductive surfaces is provided wherein the measurement is obtained by monitoring the change in impedance of a flat, generally spiral-wound, printed circuit coil which is excited by a constant current, constant frequency source. The change in impedance, which is detected as a corresponding change in voltage across the coil, is related to the eddy current losses in the distant conductive material target. The arrangement provides for considerable linear displacement range with increased accuracies, stability, and sensitivity over the entire range.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {1}
}

Patent:

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