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Sensors 2012, 12(7), 9586-9602; doi:10.3390/s120709586
Article

Study on Elastic Helical TDR Sensing Cable for Distributed Deformation Detection

1,2
, 1
 and 2,*
Received: 31 May 2012; in revised form: 30 June 2012 / Accepted: 9 July 2012 / Published: 13 July 2012
(This article belongs to the Section Physical Sensors)
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Abstract: In order to detect distributed ground surface deformation, an elastic helical structure Time Domain Reflectometry (TDR) sensing cable is shown in this paper. This special sensing cable consists of three parts: a silicone rubber rope in the center; a couple of parallel wires coiling around the rope; a silicone rubber pipe covering the sensing cable. By analyzing the relationship between the impedance and the structure of the sensing cable, the impedance model shows that the sensing cable impedance will increase when the cable is stretched. This specific characteristic is verified in the cable stretching experiment which is the base of TDR sensing technology. The TDR experiment shows that a positive reflected signal is created at the stretching deformation point on the sensing cable. The results show that the deformation section length and the stretching elongation will both affect the amplitude of the reflected signal. Finally, the deformation locating experiments show that the sensing cable can accurately detect the deformation point position on the sensing cable.
Keywords: elastic helical; distributed detection; TDR sensing cable; geological hazard monitoring elastic helical; distributed detection; TDR sensing cable; geological hazard monitoring
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Tong, R.; Li, M.; Li, Q. Study on Elastic Helical TDR Sensing Cable for Distributed Deformation Detection. Sensors 2012, 12, 9586-9602.

AMA Style

Tong R, Li M, Li Q. Study on Elastic Helical TDR Sensing Cable for Distributed Deformation Detection. Sensors. 2012; 12(7):9586-9602.

Chicago/Turabian Style

Tong, Renyuan; Li, Ming; Li, Qing. 2012. "Study on Elastic Helical TDR Sensing Cable for Distributed Deformation Detection." Sensors 12, no. 7: 9586-9602.



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