Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces

Gibson, George H; Smits, Robert G; Eberhard, Philippe H

Title: Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces

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Abstract

A device for uncovering imperfections in electrical conducting wire, particularly superconducting wire, by detecting variations in eddy currents. Eddy currents effect the magnetic field in a gap of an inductor, contained in a modified commercial ferrite core, through which the wire being tested is passed. A small increase or decrease in the amount of conductive material, such as copper, in a fixed cross section of wire will unbalance a bridge used to measure the impedance of the inductor, tripping a detector and sounding an alarm.

Inventors:

Gibson, George H ^[1]; Smits, Robert G ^[1]; Eberhard, Philippe H ^[2]

Lafayette, CA
El Cerrito, CA

Issue Date:: 1989-01-01

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

OSTI Identifier:: 867097

Patent Number(s):: 4864236

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N27/9006 - {Details}

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DOE Contract Number:: AC03-76SF00098

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: wire; inhomogeneity; detector; core; opposing; pole; pieces; guide; adjacent; device; uncovering; imperfections; electrical; conducting; particularly; superconducting; detecting; variations; eddy; currents; effect; magnetic; field; gap; inductor; contained; modified; commercial; ferrite; tested; passed; increase; decrease; amount; conductive; material; copper; fixed; section; unbalance; bridge; measure; impedance; tripping; sounding; alarm; electrical conducting; pole pieces; eddy current; conductive material; magnetic field; superconducting wire; eddy currents; ferrite core; opposing pole; pole piece; conducting wire; detecting variations; /324/

Citation Formats


                    Gibson, George H, Smits, Robert G, and Eberhard, Philippe H. Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces.  United States: N. p., 1989. 
        Web.

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                    Gibson, George H, Smits, Robert G, & Eberhard, Philippe H. Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces.  United States.

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                    Gibson, George H, Smits, Robert G, and Eberhard, Philippe H. Sun .  
        "Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces".  United States.  https://www.osti.gov/servlets/purl/867097.

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@article{osti_867097,

  title        = {Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces},

  author       = {Gibson, George H and Smits, Robert G and Eberhard, Philippe H},

  abstractNote = {A device for uncovering imperfections in electrical conducting wire, particularly superconducting wire, by detecting variations in eddy currents. Eddy currents effect the magnetic field in a gap of an inductor, contained in a modified commercial ferrite core, through which the wire being tested is passed. A small increase or decrease in the amount of conductive material, such as copper, in a fixed cross section of wire will unbalance a bridge used to measure the impedance of the inductor, tripping a detector and sounding an alarm.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1989},

  month        = {1}

}

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