전극봉의 수위 검지 회로
    14.
    发明授权
    전극봉의 수위 검지 회로 失效
    水位检测电路

    公开(公告)号:KR1019890004951B1

    公开(公告)日:1989-12-02

    申请号:KR1019870003489

    申请日:1987-04-11

    Abstract: The circuit utilizing electrode (1) for detecting water level measures capacitance of water. The circuit comprising registors (R1- R3, R5, VR), diodes (D1-D3), transistors (TR1,TR2) and a photo coupler (PC) is turned on at positive half cycle of AC input. A variable registor (VR) is utilized to adjust the reference voltage determined by the type of water.

    Abstract translation: 用于检测水位的电路利用电极(1)测量水的电容。 包括注册商(R1- R3,R5,VR),二极管(D1-D3),晶体管(TR1,TR2)和光电耦合器(PC)的电路以交流输入的正半周期导通。 利用可变电阻(VR)来调节由水的类型决定的参考电压。

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