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    • 35. 发明授权
    • Smoke detector
    • 烟雾探测器
    • US4524351A
    • 1985-06-18
    • US408050
    • 1982-08-13
    • Tetsuo KimuraHirofumi FujiiHayami YuasaTatuo Yonezawa
    • Tetsuo KimuraHirofumi FujiiHayami YuasaTatuo Yonezawa
    • G01N27/66G01N33/00G08B17/10
    • G08B17/10G01N27/66G01N33/0062
    • In a smoke detector of the type in which smoke is detected in a detection chamber based upon a variation of an ionization current flowing therein or a variation of light beam passing therethrough, there is provided a reference signal generating section which produces a reference signal having a predetermined characteristic corresponding to typical smoke flowing into the detection chamber when a fire occurs, and a signal comparison section which compares a detection signal detected in the detection chamber with the reference signal, wherein a smoke sensing signal is produced when the detection signal is determined as a signal due to a fire but is not produced when the detection signal is determined as the signal due to the entry of an insect into the detection chamber or due to cigarette's smoke flowing thereinto.
    • 在基于流过其中的电离电流的变化或通过其中的光束的变化的检测室中检测到烟雾的烟雾检测器中,设置有参考信号产生部分,其产生具有 对应于在发生火灾时流入检测室的典型烟雾的预定特性;以及信号比较部,其将检测室中检测到的检测信号与参考信号进行比较,其中当检测信号被确定为 当由于昆虫进入检测室或由于香烟的烟雾流入时,检测信号被确定为信号时,由于火而产生信号,但不产生。