| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a flame detector that uses a semiconductor light-receiving element as a light receiving cell, especially improves the noise resistance, stabilizes the flame detection characteristic, and has a simple constitution. <P>SOLUTION: The flame detector comprises: the semiconductor light-receiving element for detecting visible light emitted by flame; and a detector body that supplies the driving voltage to the semiconductor light-receiving element via a cable, detects a flame detection signal by the semiconductor light-receiving element via the cable, and determines the existence of flame. Especially, a filter circuit for making the apparent response characteristic of the semiconductor light-receiving element broad by delaying and outputting the flame detection signal by the semiconductor light-receiving element to the cable is disposed just near the semiconductor light-receiving element. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
