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    • 4. 发明授权
    • Flame detecting arrangement for detecting a flame through horizontal and
vertical scanning of a supervisory region by using a photodetector
    • 火焰检测装置,用于通过使用光电检测器的监控区域的水平和垂直扫描来检测火焰
    • US4800285A
    • 1989-01-24
    • US68145
    • 1987-06-29
    • Kouji AkibaAkira KitajimaYoshio Arai
    • Kouji AkibaAkira KitajimaYoshio Arai
    • G01J1/42G08B17/12
    • G08B17/12
    • A flame detecting apparatus and a flame detecting method which utilizes a flame detector having a directivity and provided with a photodetector such as a photodiode or a phototransistor which produces a photo-output in response to the intensity of light incident thereupon. The flame detector is scanned sequentially in the horizontal and the vertical direction within a supervisory region. When a photo-output from said flame detector obtained in the horizontal or vertical scanning by said scanning means exceeds a predetermined threshold value, one of the horizontal and the vertical scanning is suspended, while repeating the other, vertical or horizontal, scanning at the same horizontal or vertical position several times. Flame determination is made when the changes in the photo-outputs, which is obtained through the repeated scanning, exceed a predetermined value and they last over a predetermined scanning angle.
    • 一种火焰检测装置和火焰检测方法,其使用具有方向性的火焰检测器,并且设置有光电检测器,例如光电二极管或光电晶体管,其响应于入射到其上的光的强度产生光输出。 火焰检测器在监控区域内沿水平方向和垂直方向依次扫描。 当通过所述扫描装置在水平或垂直扫描中获得的来自所述火焰探测器的光输出超过预定阈值时,水平和垂直扫描中的一个被暂停,同时重复另一个垂直扫描或水平扫描 水平或垂直位置几次。 当通过重复扫描获得的光输出的变化超过预定值并且它们持续超过预定的扫描角度时,进行火焰确定。