| 摘要 |
PROBLEM TO BE SOLVED: To observe, in a spot manner, a predetermined place, for example, a fire-using apparatus, an apparatus as a heat generation source, or a trash can or their periphery, and generate an alarm upon detection of a fire.SOLUTION: A fire sensor 18 which is provided detachably through a sensor base 16 is arranged in each predetermined sense section, an alarm unit 20 united between the sensor base 16 and fire sensor 18 is connected to a sensor line 12 led out of a receiver 10, and a plurality of observation chips 22 are arranged in necessary places within the sense area of the fire sensor 18. The observation chips 22 each observe a temperature or smoke density in the predetermined place, changing as a fire takes place and transmit an observation signal including observation data to the alarm unit 20 by radio. The alarm unit 20 when detecting the fire based upon the temperature or smoke density that the observation data of the observation signal received from the observation chip 22 indicates, transmits a fire detection signal to the receiver 10 which is made to output a fire alarm. |
