Intrusion detecting apparatus with zone identification and with noise interference discrimination
First Claim
1. Intrusion detection apparatus comprising:
- (a) a plurality of intrusion detection sensors connected to a first signal line;
(b) a plurality of discriminator sensors connected to a second signal line, said first and second signal lines being in the same cable; and
(c) means connected to said intrusion detection sensors and said discriminator sensors and responsive to the activation of any one of said intrusion detection sensors but not more than a predetermined number of said discriminator sensors for operating an alarm.
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Accused Products
Abstract
Apparatus for detecting the presence of intruders includes a plurality of sensors. The apparatus not only operates an alarm to indicate the presence of an intruder, but, also, identifies the location in which the intrusion has occurred. There are two groups of sensors at each discrete location or zone. One group of sensors detects the presence of an intruder by the activation of one or more sensors. Another group of sensors discriminates against externally generated sounds to reduce false alarms. In the preferred embodiment, both groups of sensors utilize the same cable. An intrusion detection multiplexer and a discriminator multiplexer are employed to enable the sensors of each zone respectively to be sequentially detected and identified through the same apparatus.
188 Citations
21 Claims
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1. Intrusion detection apparatus comprising:
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(a) a plurality of intrusion detection sensors connected to a first signal line; (b) a plurality of discriminator sensors connected to a second signal line, said first and second signal lines being in the same cable; and (c) means connected to said intrusion detection sensors and said discriminator sensors and responsive to the activation of any one of said intrusion detection sensors but not more than a predetermined number of said discriminator sensors for operating an alarm. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Intrusion detection apparatus comprising:
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(a) a plurality of signal lines of intrusion detection sensors; (b) a plurality of signal lines of discriminator sensors; and (c) means connected to said signal lines of intrusion detection sensors and said signal lines of discriminator sensors and responsive to the activation of any one of said intrusion detection sensors but not more than a predetermined number of said discriminator sensors for operating an alarm, (d) said means comprising a signal processor, (e) said signal processor comprising; (1) an intrusion detection multiplexer for sensing successively said signal lines of intrusion detection sensors and advancing signals conducted over any one of said signal lines of intrusion detection sensors through said signal processor, and (2) a discriminator multiplexer for sensing signals emanating from said discriminator sensors over said signal lines of discriminator sensors and advancing signals conducted over signals lines of discriminator sensors through said signal processor. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. Intrusion detection apparatus comprising:
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(a) a plurality of intrusion detection sensors; (b) a plurality of discriminator sensors; and (c) means connected to said intrusion detection sensors and said discriminator sensors and responsive to the activation of any one of said intrusion detection sensors but not more than a predetermined number of said discriminator sensors for operating an alarm. - View Dependent Claims (21)
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Specification