Patent ID: 9626858
Date: 2017-04-18
CPC Classifications: F24F,G01J,G01N,G01V,G06K,G06T,G08B,H04L,H04M,H04N,H05B,Y02A,Y02B

Claim:
1. A method for operating a hazard detector, comprising: sensing, using a hazard sensor of the hazard detector, a hazard level; alarming, by the hazard detector, according to an emergency alarm threshold that indicates the presence of a dangerous condition when the emergency alarm threshold is exceeded by the sensed hazard level; outputting, by the hazard detector, a warning according to a pre-alarm threshold when the pre-alarm threshold is exceeded by the sensed hazard level but the emergency alarm threshold is not exceeded by the sensed hazard level; storing data indicative of sensed hazard levels over a particular time period, wherein the sensed hazard levels are sufficient to exceed the pre-alarm threshold but insufficient to exceed the emergency alarm threshold; analyzing the data of the sensed hazard levels over the particular time period to identify a reoccurring trend, wherein: raising, by the hazard detector, the pre-alarm threshold to a raised pre-alarm threshold, but not raising the emergency alarm threshold, in response to an onset of a subsequent occurrence of the reoccurring trend; operating the hazard detector according to the emergency alarm threshold and the raised pre-alarm threshold in response to the reoccurring trend; and operating the hazard detector according to the emergency alarm threshold and the pre-alarm threshold in an absence of the onset of an occurrence of the reoccurring trend.