New Technologies For Monitoring Highwall Movement At Syncrude Canada Ltd.

Lord, E. R. F.; Peterson, D.; Thompson, G. O.; Stevens, Tony

doi:10.2118/91-97

Cited by 1 publication

(1 citation statement)

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“…The application of the technique can be traced back [1] to 1931 when first Rohrig and then others [2,3] used it to locate faults in telephone cables. Since then it has been applied to monitor movements of rock mass, mine surfaces and slopes [4][5][6][7][8][9][10][11][12], water content and electrical conductivity [13][14][15][16][17][18], and deformation in cable-like structures such as pipelines [19] and forming lines [20]. Detailed reviews of TDR applications of coaxial cables have been given by Andrew [1] and Kane et al [12].…”

Section: Introductionmentioning

confidence: 99%

Possibility of using a coaxial cable as a distributed strain sensor by time domain reflectometry

Tang

Tao

Choy

2001

Smart Mater. Struct.

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In this paper, the possibility of using coaxial cables as distributed strain sensors by time domain reflectometry is studied. Analytical analysis is conducted on the relation between the distributed axial strain and the change of characteristic impedance as well as on the relation between the change of characteristic impedance and the voltage of the reflected wave. The analysis leads to the establishment of the quantitative relation between the distributed axial strains of a coaxial cable and the change in the voltage of the reflected wave. It is demonstrated that the voltage of the reflected wave can be used to measure the magnitude and determine the location of the axial strains in a coaxial cable. Furthermore, a good linearity is obtained when the axial strains are small. The investigation highlights the potential of coaxial cables as distributed strain sensors. Finally, the existing problems for such sensors are discussed.

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