Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-11-22
2005-11-22
Wu, Daniel (Department: 2632)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S564000, C340S552000, C340S566000
Reexamination Certificate
active
06967584
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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Senstar-Stellar Corporation
Walk Samuel J.
Wu Daniel
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