| 摘要 |
The present invention relates to a fire detector and, more specifically, to a fire detector for accurately predicting whether a fire is occurred by detecting artificial temperature change by simultaneously sensing a movement of the human body through a radar sensor which measures a microwave, and change amount of indoor temperature and human body through a thermal image sensor of infrared method. According to the present invention, the fire detector comprises: a body installed at a ceiling or a wall; a motion sensor for detecting movement within a predetermined distance by being installed at one side within the body; a thermal image sensor to sense a temperature of an infrared energy in a predetermined area by being installed at other side within the body; a reflection board installed to cover the surround of the thermal image sensor formed as a predetermined curved shape to a low part; a diffused reflector for irregularly reflecting an infrared ray reflected from the reflection board to the thermal image sensor; a cover combined at a lower part of the body and separately supporting the diffused reflector to the thermal image sensor to be separated to the low part with a predetermined space; and a control unit to determine whether the fire is occurred by using temperature information detected in the thermal image sensor and to transmit a fire occurrence signal when the occurrence of the fire is determined. The control unit determines an artificial heating phenomenon and does not transmit a fire occurrence signal when the movement of a human body or an object is sensed through the motion sensor in a state in which the above temperature value is detected to be determined as the fire occurrence in the thermal image sensor. |
