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

Patent · Sun Jan 01 00:00:00 EST 1989

OSTI ID:867097

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

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1. Lafayette, CA
2. El Cerrito, CA

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.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4864236
• OSTI ID: 867097
• Country of Publication: United States
• Language: English

Related Subjects

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
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