G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 17/10 (2006.01) G08B 29/04 (2006.01) G08B 29/26 (2006.01) H04Q 9/14 (2006.01)
Patent
CA 2042247
Methods for detecting an alarm condition comprises repeatedly converting an ambient condition into voltage outputs in detector means, repeatedly converting the voltage outputs into a series of actual analog values, polling the series of actual analog values to determine an average analog value, repeatedly comparing the difference between the average analog value and the last actual analog value with a predetermined delta-threshold value and indicating an alarm condition when the difference between the average analog value and the last actual analog value exceeds the delta-threshold value. Methods far detecting an alarm condition further comprise repeatedly comparing the average analog value with a maintenance threshold value and indicating a maintenance signal when the average analog value exceeds the maintenance threshold value.
Farley Robert W.
Motyka Charles J. Jr.
Stanley Lawrence G.
Adt Services Ag
Gowling Lafleur Henderson Llp
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