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Open AccessArticle

Development of a Distributed Crack Sensor Using Coaxial Cable

by Zhi Zhou 1,2,*, Tong Jiao 1,2, Peng Zhao 1,2, Jia Liu 1,2 and Hai Xiao 3
School of Civil Engineering, Dalian University of Technology, Dalian 116024, China
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
Electrical and Computer Engineering Department, Clemson University, Clemson, SC 29634, USA
Author to whom correspondence should be addressed.
Academic Editors: Ferran Martín and Jordi Naqui
Sensors 2016, 16(8), 1198;
Received: 21 June 2016 / Revised: 26 July 2016 / Accepted: 26 July 2016 / Published: 29 July 2016
Cracks, the important factor of structure failure, reflect structural damage directly. Thus, it is significant to realize distributed, real-time crack monitoring. To overcome the shortages of traditional crack detectors, such as the inconvenience of installation, vulnerability, and low measurement range, etc., an improved topology-based cable sensor with a shallow helical groove on the outside surface of a coaxial cable is proposed in this paper. The sensing mechanism, fabrication method, and performances are investigated both numerically and experimentally. Crack monitoring experiments of the reinforced beams are also presented in this paper, illustrating the utility of this sensor in practical applications. These studies show that the sensor can identify a minimum crack width of 0.02 mm and can measure multiple cracks with a spatial resolution of 3 mm. In addition, it is also proved that the sensor performs well to detect the initiation and development of cracks until structure failure. View Full-Text
Keywords: coaxial cable; crack; distributed sensor coaxial cable; crack; distributed sensor
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Zhou, Z.; Jiao, T.; Zhao, P.; Liu, J.; Xiao, H. Development of a Distributed Crack Sensor Using Coaxial Cable. Sensors 2016, 16, 1198.

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