Integrated sensor cable for ranging
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United States of America Patent
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Nov 22, 2005
Grant Date -
Feb 3, 2005
app pub date -
Jul 28, 2003
filing date -
Jul 28, 2003
priority date (Note) -
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Abstract
An intrusion detection system provides the function of an 'active' ranging sensor cable system utilized for identification of the location of the intruder, with that of a 'passive' cable detection system, in an integrated cable configuration. This dual function is provided with a single conventional sensing cable optimized for both 'active' and 'passive' sensing, or in combination with other parallel sensing cables for a 'passive' cable component. The 'active' cable component includes a coaxial sensor cable having a loosely disposed conductor. A signal is injected into the sensor cable such that a reflection is altered when an intrusion disturbs the cable. Based on the timing of the reflection, a processor, or a reflectometer, identifies the location of the disturbance. The 'passive' cable component can be sensitized to detect intrusion via some other sensing phenomenology, such as the triboelectric effect, for triboelectric effect sensing.
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