초록 ▼

A fire detector is equipped with a smoke detector and electrical circuitry for declaring a fire alarm if a smoke concentration based fire detection criteria is satisfied. A CO.sub.2 detector is included in the fire detector for forming an a priori estimate of the probability of the existence of a fi

A fire detector is equipped with a smoke detector and electrical circuitry for declaring a fire alarm if a smoke concentration based fire detection criteria is satisfied. A CO.sub.2 detector is included in the fire detector for forming an a priori estimate of the probability of the existence of a fire. If the a priori probability rises above a predetermined level, the smoke concentration base fire detection criteria of the smoke detector are altered to allow the more rapid detection of a fire.

대표청구항 ▼

[ What is claimed is:] [1.] In a fire detector having a smoke detector for producing a smoke detector output signal and electrical circuitry for receiving the smoke detector output signal and for generating an alarm signal in response to the satisfaction of a smoke detector output signal fire detect

[ What is claimed is:] [1.] In a fire detector having a smoke detector for producing a smoke detector output signal and electrical circuitry for receiving the smoke detector output signal and for generating an alarm signal in response to the satisfaction of a smoke detector output signal fire detection criteria, a method for dynamically adjusting the smoke detector output signal fire detection criteria, comprising:providing a carbon dioxide (CO.sub.2) detector for forming a sequence of measurements of CO.sub.2 concentration;providing a communicative connection between the CO.sub.2 detector and the electrical circuitry;sending the measurements of CO.sub.2 concentration from the CO.sub.2 detector to the electrical circuitry by way of the communicative connection;determining an estimate of the a priori probability of the existence of a fire from the CO.sub.2 measurements; andaltering a smoke detector output signal fire detection criterion in response to the estimate of the a priori probability of the existence of a fire.