Wire inhomogeneity detector having a core with opposing pole pieces and guide pieces adjacent the opposing pole pieces
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:
-
- Lafayette, CA
- El Cerrito, CA
- Issue Date:
- 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
- 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.
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.
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.
@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}
}