TY - GEN
T1 - Development of a wireless nonlinear wave modulation spectroscopy (NWMS) sensor node for fatigue crack detection
AU - Liu, Peipei
AU - Yang, Suyoung
AU - Lim, Hyung Jin
AU - Park, Hyung Chul
AU - Ko, In Chang
AU - Sohn, Hoon
PY - 2014
Y1 - 2014
N2 - Fatigue crack is one of the main culprits for the failure of metallic structures. Recently, it has been shown that nonlinear wave modulation spectroscopy (NWMS) is effective in detecting nonlinear mechanisms produced by fatigue crack. In this study, an active wireless sensor node for fatigue crack detection is developed based on NWMS. Using PZT transducers attached to a target structure, ultrasonic waves at two distinctive frequencies are generated, and their modulation due to fatigue crack formation is detected using another PZT transducer. Furthermore, a reference-free NWMS algorithm is developed so that fatigue crack can be detected without relying on history data of the structure with minimal parameter adjustment by the end users. The algorithm is embedded into FPGA, and the diagnosis is transmitted to a base station using a commercial wireless communication system. The whole design of the sensor node is fulfilled in a low power working strategy. Finally, an experimental verification has been performed using aluminum plate specimens to show the feasibility of the developed active wireless NWMS sensor node.
AB - Fatigue crack is one of the main culprits for the failure of metallic structures. Recently, it has been shown that nonlinear wave modulation spectroscopy (NWMS) is effective in detecting nonlinear mechanisms produced by fatigue crack. In this study, an active wireless sensor node for fatigue crack detection is developed based on NWMS. Using PZT transducers attached to a target structure, ultrasonic waves at two distinctive frequencies are generated, and their modulation due to fatigue crack formation is detected using another PZT transducer. Furthermore, a reference-free NWMS algorithm is developed so that fatigue crack can be detected without relying on history data of the structure with minimal parameter adjustment by the end users. The algorithm is embedded into FPGA, and the diagnosis is transmitted to a base station using a commercial wireless communication system. The whole design of the sensor node is fulfilled in a low power working strategy. Finally, an experimental verification has been performed using aluminum plate specimens to show the feasibility of the developed active wireless NWMS sensor node.
KW - Fatigue crack
KW - Nonlinear wave modulation spectroscopy (NWMS)
KW - Reference-free damage detection
KW - Structural health monitoring (SHM)
KW - Wireless sensor node
UR - http://www.scopus.com/inward/record.url?scp=84902001289&partnerID=8YFLogxK
U2 - 10.1117/12.2045747
DO - 10.1117/12.2045747
M3 - Conference contribution
AN - SCOPUS:84902001289
SN - 9780819499905
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Health Monitoring of Structural and Biological Systems 2014
PB - SPIE
T2 - Health Monitoring of Structural and Biological Systems 2014
Y2 - 10 March 2014 through 13 March 2014
ER -