A quantitative identification technique for a two-dimensional subsurface defect based on surface temperature measurement

2009 ◽  
Vol 38 (4) ◽  
pp. 223-233 ◽  
Author(s):  
Chunli Fan ◽  
Fengrui Sun ◽  
Li Yang
Keyword(s):  
Surface Temperature ◽  
Temperature Measurement ◽  
Two Dimensional ◽  
Surface Temperature Measurement ◽  
Subsurface Defect ◽  
Identification Technique ◽  
Quantitative Identification

Surface Temperature Measurement Using Infrared Radiometer by Applying a Pseudo-Gray-Body Approximation: Estimation of Radiative Property for Metal Surface

1996 ◽  
Vol 118 (1) ◽  
pp. 73-78 ◽  
Author(s):  
T. Inagaki ◽  
Y. Okamoto
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Surface Temperature ◽  
Temperature Measurement ◽  
Metal Surfaces ◽  
Radiative Properties ◽  
Two Dimensional ◽  
Visualization Technique ◽  
Surface Temperature Measurement ◽  
Infrared Radiometer

The visualization technique using an infrared radiometer has been widely used to estimate a two-dimensional temperature distribution on a surface. We have previously proposed various characteristics of the radiative properties for nonmetal surfaces on which the gray-body approximation can be used. However, the gray-body approximation can not be applied to glossy metal surfaces, because the influence of the reflected energy on the temperature measurement becomes severe. A pseudo-gray-body approximation is therefore proposed to estimate a temperature field on metal surfaces and its applicability is confirmed using an infrared radiometer with three detection wavelength bands.

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