Method and apparatus for detecting normal cracks using infrared thermal imaging
Abstract
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.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of Chicago, IL (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1531475
- Patent Number(s):
- 6730912
- Application Number:
- 10/232,176
- Assignee:
- The University of Chicago (Chicago, IL)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- DOE Contract Number:
- W-31-109-ENG-38
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2002-08-30
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION
Citation Formats
Sun, Jiangang G., and Erdman, Scott M. Method and apparatus for detecting normal cracks using infrared thermal imaging. United States: N. p., 2004.
Web.
Sun, Jiangang G., & Erdman, Scott M. Method and apparatus for detecting normal cracks using infrared thermal imaging. United States.
Sun, Jiangang G., and Erdman, Scott M. Tue .
"Method and apparatus for detecting normal cracks using infrared thermal imaging". United States. https://www.osti.gov/servlets/purl/1531475.
@article{osti_1531475,
title = {Method and apparatus for detecting normal cracks using infrared thermal imaging},
author = {Sun, Jiangang G. and Erdman, Scott M.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 04 00:00:00 EDT 2004},
month = {Tue May 04 00:00:00 EDT 2004}
}
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