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Title: Eddy current nondestructive testing device for measuring variable characteristics of a sample utilizing Walsh functions

Abstract

An eddy current testing device for measuring variable characteristics of a sample generates a signal which varies with variations in such characteristics. A signal expander samples at least a portion of this generated signal and expands the sampled signal on a selected basis of square waves or Walsh functions to produce a plurality of signal components representative of the sampled signal. A network combines these components to provide a display of at least one of the characteristics of the sample.

Inventors:
 [1];  [1]
  1. Richland, WA
Issue Date:
Research Org.:
Battelle Memorial Institute, Columbus, OH (United States)
OSTI Identifier:
863053
Patent Number(s):
4084136
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
eddy; current; nondestructive; testing; device; measuring; variable; characteristics; sample; utilizing; walsh; functions; generates; signal; varies; variations; expander; samples; portion; generated; expands; sampled; selected; basis; square; waves; produce; plurality; components; representative; network; combines; provide; display; generated signal; eddy current; testing device; square wave; sample utilizing; sampled signal; nondestructive testing; measuring variable; square waves; variable characteristics; current testing; /324/

Citation Formats

Libby, Hugo L, and Hildebrand, Bernard P. Eddy current nondestructive testing device for measuring variable characteristics of a sample utilizing Walsh functions. United States: N. p., 1978. Web.
Libby, Hugo L, & Hildebrand, Bernard P. Eddy current nondestructive testing device for measuring variable characteristics of a sample utilizing Walsh functions. United States.
Libby, Hugo L, and Hildebrand, Bernard P. Sun . "Eddy current nondestructive testing device for measuring variable characteristics of a sample utilizing Walsh functions". United States. https://www.osti.gov/servlets/purl/863053.
@article{osti_863053,
title = {Eddy current nondestructive testing device for measuring variable characteristics of a sample utilizing Walsh functions},
author = {Libby, Hugo L and Hildebrand, Bernard P},
abstractNote = {An eddy current testing device for measuring variable characteristics of a sample generates a signal which varies with variations in such characteristics. A signal expander samples at least a portion of this generated signal and expands the sampled signal on a selected basis of square waves or Walsh functions to produce a plurality of signal components representative of the sampled signal. A network combines these components to provide a display of at least one of the characteristics of the sample.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

Patent:

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