Dual velocity leaky cable intrusion detector sensor

Details Dual velocity leaky cable intrusion detector sensor Dual velocity leaky cable intrusion detector sensor

G - Physics

08

B

340/124.3

G08B 13/24 (2006.01)

Patent

CA 1229142

ABSTRACT A sensor for use in a leaky cable intrusion system which is comprised of a pair of parallel buried coaxial cables, each of which has a velocity of propagation factor different from the other. This results in different sensitivity characteristics with length, resulting in a combined sensitivity which has markedly reduced amplitude variation over cables having similar velocities of propagation. It also makes feasible a system having ungraded cables in which the position of intrusion in the field set up by the sensor can be determined.

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