Method and apparatus for detecting normal cracks using infrared thermal imaging

Sun, Jiangang G.; Erdman, Scott M.

Title: Method and apparatus for detecting normal cracks using infrared thermal imaging

Patent · Tue May 04 00:00:00 EDT 2004

OSTI ID:1531475

Sun, Jiangang G.; Erdman, Scott M.

A method and infrared thermal imaging apparatus detects normal and angled cracks on or beneath a sample surface using infrared thermal imaging where the crack plane is perpendicular or angled to an imaged surface of the sample. A constant heating source is used for heating a section of the sample to produce a lateral heat transfer through the sample. An infrared camera is positioned near one side of the sample for receiving thermal image data resulting from the lateral heat transfer through the sample. A data acquisition and processing computer is used for acquiring and differentiation processing thermal image data from the infrared camera for generating two-dimensional first derivative and second derivative images to detect the normal and angled cracks.

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Research Organization:: Univ. of Chicago, IL (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: W-31-109-ENG-38

Assignee:: The University of Chicago (Chicago, IL)

Patent Number(s):: 6,730,912

Application Number:: 10/232,176

OSTI ID:: 1531475

Resource Relation:: Patent File Date: 2002-08-30

Country of Publication:: United States

Language:: English

References (7)

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System and method for using one or more thermal sensor probes for flow analysis, flow assurance and pipe condition monitoring of a pipeline for flowing hydrocarbons Huang, Songming; de Chizelle, Yan Kuhn https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8360635 US Patent Document 8,360,635	patent	January 2013
Methods and systems for measurement and estimation of normalized contrast in infrared thermography Koshti, Ajay M. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9787913 US Patent Document 9,787,913	patent	October 2017
Method for thermal tomography of thermal effusivity from pulsed thermal imaging Sun, Jiangang https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7365330 US Patent Document 7,365,330	patent	April 2008
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Vibrothermographic weld inspections Renshaw, Jeremy B.; Glass, III, Samuel W.; Thigpen, Bradley A. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9146205 US Patent Document 9,146,205	patent	September 2015
Device for contactlessly testing passive routing substrates Chien, Jui-Hung; Yu, Hao; Hsu, Ruei-Siang https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9380223 US Patent Document 9,380,223	patent	June 2016
Real-time infrared thermography inspection and control for automated composite marterial layup Ritter, John Alan; Sjogren, John F. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7513964 US Patent Document 7,513,964	patent	April 2009
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Air-coupled acoustic thermography for in-situ evaluation Zalameda, Joseph N.; Winfree, William P.; Yost, William T. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7855368 US Patent Document 7,855,368	patent	December 2010
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