Crack detection using sonic infrared imaging in steel structures: experiments and theory of heating patterns

2009 ◽  
Author(s):  
Qi He ◽  
Xiaoyan Han
Keyword(s):  
Crack Detection ◽  
Infrared Imaging ◽  
Steel Structures ◽  
Sonic Infrared

Detection of Crack Growth in Asphalt Pavement Through Use of Infrared Imaging

2017 ◽  
Vol 2645 (1) ◽  
pp. 24-31 ◽  
Author(s):  
Yuchuan Du ◽  
Xiaoming Zhang ◽  
Feng Li ◽  
Lijun Sun
Keyword(s):  
Crack Growth ◽  
Temperature Difference ◽  
Crack Detection ◽  
Infrared Imaging ◽  
Asphalt Pavement ◽  
Atmospheric Temperature ◽  
Support Vector ◽  
Road Maintenance ◽  
Pavement Maintenance ◽  
Detection Model

The degree of crack growth in asphalt pavement is an important decision-making factor in road maintenance management. Automatic crack detection is based mainly on digital images; this factor makes effective detection of the degree of crack growth difficult. Infrared thermography was used, and a detection method for the degree of crack growth on the basis of infrared imaging was proposed. Infrared images included gray-level information on cracks and temperature information; the latter provided one additional dimension of information over ordinary images. Temperature information was used to detect the degree of crack growth. Atmospheric temperature was found to be the main factor that affected the temperature difference between a crack and the road surface. This temperature difference varied significantly for different extents of crack growth, and therefore this difference can be used to detect the degree of crack growth. Two classification functions that divided the degree of crack growth into three grades were obtained by classifying data through the use of a support vector machine. A suitable environmental condition for using the detection model was proposed. The experimental results showed that the average model error was 15.4%, which indicated a good application prospect and an improvement in economic benefit for pavement maintenance.

Study of the effect of crack closure in Sonic Infrared Imaging

2007 ◽  
Vol 22 (2-3) ◽  
pp. 127-135 ◽  
Author(s):  
Jianping Lu ◽  
Xiaoyan Han ◽  
Golam Newaz ◽  
L. D. Favro ◽  
R. L. Thomas
Keyword(s):  
Crack Closure ◽  
Infrared Imaging ◽  
Sonic Infrared

Research on optimization method of test conditions in sonic infrared imaging

2016 ◽  
Vol 45 (2) ◽  
pp. 204005
Author(s):  
张超省 Zhang Chaosheng ◽  
宋爱斌 Song Aibin ◽  
冯辅周 Feng Fuzhou ◽  
闵庆旭 Min Qingxu ◽  
朱俊臻 Zhu Junzhen
Keyword(s):  
Infrared Imaging ◽  
Optimization Method ◽  
Sonic Infrared ◽  
Test Conditions

P107 Fatigue Crack Detection in Steel Structures by Self-reference Lock-in Thermography

2005 ◽  
Vol 2005 (0) ◽  
pp. 637-638
Author(s):  
Takashi Nishimura ◽  
Takahide Sakagami ◽  
Shiro Kubo ◽  
Kazunari Ishino
Keyword(s):  
Fatigue Crack ◽  
Crack Detection ◽  
Steel Structures ◽  
Fatigue Crack Detection ◽  
Lock In ◽  
Self Reference
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