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Title: METAL RESISTIVITY MEASURING DEVICE

Abstract

An eddy current device is offered for detecting discontinuities in metal samples. Alternate short and long duration pulses are inductively applied to a metal sample via the outer coil of a probe. The long pulses give a resultant signal from the metal sample responsive to probe-tosample spacing and discontinuities within the sample and the shont pulses give a resultant signal responsive only to probe -to-sample spacing. The inner coil of the probe detects the two resultant signals and transmits them to a separation network where the two signals are separated. The two separated signals are then transmitted to a compensation network where the detected signals due to the short pulses are used to compensate for variations due to probe-to-sample spacing contained in the detected signals from the long pulses. Thus, a resultant signal is obtained responsive to discontinuities within the sample and independent of probe-to- sample spacing.

Inventors:
;
Issue Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4103034
Patent Number(s):
2965840
Assignee:
U.S. Atomic Energy Commission DTIE; NSA-15-007609
NSA Number:
NSA-15-007609
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-61
Country of Publication:
United States
Language:
English
Subject:
ENGINEERING AND EQUIPMENT; COILS; DETECTION; EDDY CURRENTS; ELECTRIC CONDUCTIVITY; MEASURED VALUES; METALS; PULSES; SAMPLING

Citation Formats

Renken, J. Jr., and Myers, R.G. METAL RESISTIVITY MEASURING DEVICE. United States: N. p., 1960. Web.
Renken, J. Jr., & Myers, R.G. METAL RESISTIVITY MEASURING DEVICE. United States.
Renken, J. Jr., and Myers, R.G. Tue . "METAL RESISTIVITY MEASURING DEVICE". United States.
@article{osti_4103034,
title = {METAL RESISTIVITY MEASURING DEVICE},
author = {Renken, J. Jr. and Myers, R.G.},
abstractNote = {An eddy current device is offered for detecting discontinuities in metal samples. Alternate short and long duration pulses are inductively applied to a metal sample via the outer coil of a probe. The long pulses give a resultant signal from the metal sample responsive to probe-tosample spacing and discontinuities within the sample and the shont pulses give a resultant signal responsive only to probe -to-sample spacing. The inner coil of the probe detects the two resultant signals and transmits them to a separation network where the two signals are separated. The two separated signals are then transmitted to a compensation network where the detected signals due to the short pulses are used to compensate for variations due to probe-to-sample spacing contained in the detected signals from the long pulses. Thus, a resultant signal is obtained responsive to discontinuities within the sample and independent of probe-to- sample spacing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1960},
month = {12}
}