| 摘要 |
PROBLEM TO BE SOLVED: To detect an abnormal temperature change occurring in a detection area and give an alarm depending on the degree of danger, in order to give a notice of the danger such as a fire or the like. SOLUTION: An abnormal temperature sensing method is provided for measuring temperatures of respective segments of the sensing area by using an infrared sensing element which receives infrared light from the sensing area and outputs a sensing signal whose output level corresponds to the amount of received light, for sensing an abnormal temperature of the sensing area based on temperature information of respective segments, and for giving an abnormal temperature sensing alarm. The abnormal temperature sensing method executes a step of acquiring temperature information including the latest set of temperatures and a set of temporal temperature differences (each representing a difference between the latest temperature and the previous temperature) for respective segments of the sensing area, and a step of detecting the abnormal temperature based on the temperature information of respective segments and determining a speed at which the abnormal temperature area expands, thereby carrying out abnormal temperature detections classified in accordance with the speed at which the abnormal temperature area expands, and giving different kinds of alarm in accordance with the expansion speed. COPYRIGHT: (C)2008,JPO&INPIT
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