scholarly journals The early stage wheel fatigue crack detection using eddy current pulsed thermography

2017 ◽  
Author(s):  
Jianping Peng ◽  
Kang Zhang ◽  
Kai Yang ◽  
Zhu He ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Eddy Current ◽  
Crack Detection ◽  
Early Stage ◽  
Pulsed Thermography ◽  
Fatigue Crack Detection

scholarly journals In-Line Inspection Tool with Eddy Current Instrumentation for Fatigue Crack Detection

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2161 ◽  
Author(s):  
Cesar Camerini ◽  
João Rebello ◽  
Lucas Braga ◽  
Rafael Santos ◽  
Tomasz Chady ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Eddy Current ◽  
Crack Detection ◽  
Fatigue Crack Detection

Development of a “stick-and-detect” wireless sensor node for fatigue crack detection

2016 ◽  
Vol 16 (2) ◽  
pp. 153-163 ◽  
Author(s):  
Peipei Liu ◽  
Hyung Jin Lim ◽  
Suyoung Yang ◽  
Hoon Sohn ◽  
Cheul Hee Lee ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Sensor Node ◽  
Crack Detection ◽  
Early Stage ◽  
Fatigue Cracks ◽  
Ultrasonic Waves ◽  
Wireless Sensor ◽  
Wireless Sensor Node ◽  
Target Structure ◽  
Fatigue Crack Detection

A fatigue crack and its precursor often serves as a source of nonlinear mechanism for ultrasonic waves, and nonlinear ultrasonic techniques have been widely studied to detect fatigue crack at its very early stage. In this study, a wireless sensor node based on nonlinear ultrasonics is developed specifically for fatigue crack detection: (1) through packaged piezoelectric transducers, ultrasonic waves at two distinctive frequencies are generated, and their modulation due to a microcrack (less than 0.1 mm in width) is detected; (2) an autonomous reference-free crack detection algorithm is developed and embedded into the sensor node, so that users can simply “stick” the sensor to a target structure and automatically “detect” a fatigue crack without relying on any history data of the target structure; and (3) the whole design of the sensor node is fulfilled in a low-power working strategy. The performance of the sensor node is experimentally validated using aluminum plates with real fatigue cracks and compared with that of a conventional wired system. Furthermore, a field test in Yeongjong Grand Bridge in South Korea has been conducted with the developed sensor nodes.

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