Communications: electrical – Condition responsive indicating system – With particular system function
Reexamination Certificate
2006-04-25
2006-04-25
La, Anh V. (Department: 2636)
Communications: electrical
Condition responsive indicating system
With particular system function
C340S511000, C340S552000, C340S567000, C307S117000, C250SDIG001
Reexamination Certificate
active
07034675
ABSTRACT:
An intrusion detection system includes a microwave transceiver detecting motion in a protected space. The microwave transceiver generates a first signal. A first infrared sensor detects a source of infrared energy in a plurality of upper detection zones within the protected space. The first infrared sensor generates an upper sensor signal. A second infrared sensor detects a source of infrared energy in a plurality of lower detection zones positioned below the upper detection zones within the protected space and intersecting a floor surface within the protected space. The second infrared sensor generates a lower sensor signal. A processor receives the first signal, the upper sensor signal and the lower sensor signal. The processor generates an alarm signal in response to the first signal exceeding a threshold value. The threshold value is varied in response a relationship between the lower sensor signal and the upper sensor signal.
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Bernard Michael J
DiPoala William S
Baker & Daniels LLP
Robert & Bosch GmbH
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