Dual velocity leaky cable intrusion detector sensor
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United States of America Patent
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Sep 16, 1986
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N/A
app pub date -
Oct 2, 1984
filing date -
Oct 2, 1984
priority date (Note) -
Expired
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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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