Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1993-11-15
1996-01-09
Peng, John K.
Communications: electrical
Condition responsive indicating system
With particular system function
340506, 340511, G08B 1900
Patent
active
054832225
ABSTRACT:
An alarm system which incorporates a large number of ambient condition sensors makes a determination as to the existence of a predetermined alarm condition by detecting respective ambient conditions from each member of a group of sensors. The indicators from the plurality of sensors are each raised to a respective predetermined exponent and summed together. The resultant sum is compared to a predetermined threshold to determine whether or not the alarm condition is present. The detectors can be spaced apart from one another in a selected region and coupled to a central control unit by a bi-directional communications link. Running averages of sums can be formed to provide filtering or smoothing or trend analysis.
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Peng John K.
Pittway Corporation
Wu Daniel J.
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