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    • 3. 发明专利
    • Circuit for detecting blow-out filament of signal lamp
    • 用于检测信号灯的发光线的电路
    • JP2005059623A
    • 2005-03-10
    • JP2003207558
    • 2003-08-14
    • Hitachi Eng Co LtdHitachi Ltd日立エンジニアリング株式会社株式会社日立製作所
    • OKUBO KENTAROKURISU YOFUMIMAEDA TORUKAMATA NOBUYUKI
    • G01R31/02B61L5/12H05B37/02H05B37/03
    • Y02B20/44
    • PROBLEM TO BE SOLVED: To normally detect a blown-out filment and a severed wire by preventing misdetection of cutting of the blown-out filament and the severed wire, when the blown-out filament of a signal lamp or the severed wire in an output wiring is detected during a non-operation (lighting-off). SOLUTION: This circuit for detecting the blown-out filament of a signal lamp comprises a power source 7, a diagnosis current supplying circuit 1 for detecting the blown-out filament, a circuit 2 for detecting the diagnosis current, and a voltage detection circuit 3. Switches 13, 14 are set on, and a slight diagnosis current 6 not lightening a signal lamp 4 is flown from the diagnosis current supplying circuit. When the blown-out filament of the signal lamp or the severed output wire 5 is not detected, a voltage applied to the voltage detection circuit is small, so that a photocoupler 17 is switched on, and a photocoupler 15 is switched off. When the blown-out filament of the signal or the severed output wire is detected, the voltage applied to the voltage detection circuit is large, so that both of the photocouplers 17, 15 are switched on. From such a detection pattern, the blown-out filament of the signal lamp or the severed output wiring during a non-operation (lighting-off) is detected. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:为了通过防止吹出的丝和切断的线的切割误检,通常检测吹出的毛屑和切断的丝线,当信号灯或切断的丝线的吹出的细丝 在非操作(点亮关闭)期间检测输出布线。

      解决方案:用于检测信号灯的吹出灯丝的电路包括电源7,用于检测吹出灯丝的诊断电流供应电路1,用于检测诊断电流的电路2和电压 检测电路3.开关13,14设置在开路上,并且从诊断电流供应电路流出未点燃信号灯4的轻微诊断电流6。 当没有检测到信号灯或切断的输出线5的吹出灯丝时,施加到电压检测电路的电压很小,使得光电耦合器17接通,并且关闭光电耦合器15。 当检测到信号或切断的输出线的吹出灯丝时,施加到电压检测电路的电压大,使得光电耦合器17,15都接通。 从这种检测模式中,检测到信号灯的吹出灯丝或非操作期间切断的输出布线(点亮)。 版权所有(C)2005,JPO&NCIPI