Summary
A fire sensor system based on the simultaneous detection of CO, CO2, and smoke concentrations is demonstrated. The rates of increase of these three components are used in the fire alarm algorithm to determine the presence of a fire. The algorithm monitors the rate of increase of smoke level, and when this rate exceeds its threshold rate, the rates of increase of CO and CO2 concentrations are checked. When either the rate of increase of CO or CO2 concentration exceeds its threshold rate, a fire alarm is initiated. The fire detection system was found to perform better than a smoke detector operating alone. In cases where the smoke detector did not alarm, the algorithm was able detect the fire. However, in cases where the smoke detector did alarm, the algorithm detected the fire in a much shorter time. The nuisance sources did not cause the fire detection system to generate false alarms.
SummaryA fire sensor system based on the simultaneous detection of CO, CO2, and smoke concentrations is demonstrated. The rates of increase of these three components are used in the fire alarm algorithm to determine the presence of a fire. The algorithm monitors the rate of increase of smoke level, and when this rate exceeds its threshold rate, the rates of increase of CO and CO2 concentrations are checked. When either the rate of increase of CO or CO2 concentration exceeds its threshold rate, a fire alarm is initiated. The fire detection system was found to perform better than a smoke detector operating alone. In cases where the smoke detector did not alarm, the algorithm was able detect the fire. However, in cases where the smoke detector did alarm, the algorithm detected the fire in a much shorter time. The nuisance sources did not cause the fire detection system to generate false alarms.
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