Development of an active wireless sensor node for fatigue crack detection using nonlinear wave modulation

2015 ◽  
pp. 65-68
Keyword(s):  
Fatigue Crack ◽  
Nonlinear Wave ◽  
Sensor Node ◽  
Crack Detection ◽  
Wireless Sensor ◽  
Wireless Sensor Node ◽  
Wave Modulation ◽  
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.

Development of a wireless nonlinear wave modulation spectroscopy (NWMS) sensor node for fatigue crack detection

2014 ◽  
Author(s):  
Peipei Liu ◽  
Suyoung Yang ◽  
Hyung Jin Lim ◽  
Hyung Chul Park ◽  
In Chang Ko ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Nonlinear Wave ◽  
Sensor Node ◽  
Crack Detection ◽  
Modulation Spectroscopy ◽  
Wave Modulation ◽  
Fatigue Crack Detection

Nonlinear ultrasonic wave modulation for online fatigue crack detection

2014 ◽  
Vol 333 (5) ◽  
pp. 1473-1484 ◽  
Author(s):  
Hoon Sohn ◽  
Hyung Jin Lim ◽  
Martin P. DeSimio ◽  
Kevin Brown ◽  
Mark Derriso
Keyword(s):  
Fatigue Crack ◽  
Ultrasonic Wave ◽  
Crack Detection ◽  
Wave Modulation ◽  
Nonlinear Ultrasonic ◽  
Fatigue Crack Detection

Study of Wireless Sensor Node Functions for Underwater Monitoring Sensor Network

2013 ◽  
Vol 133 (4) ◽  
pp. 414-420 ◽  
Author(s):  
Tsuyoshi Suzuki ◽  
Takafumi Kobayashi ◽  
Kei Sawai ◽  
Kuniaki Kawabata ◽  
Fumiaki Takemura ◽  
...  
Keyword(s):  
Sensor Network ◽  
Sensor Node ◽  
Wireless Sensor ◽  
Wireless Sensor Node
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