| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an amplitude control voltage sensor capable of outputting the amplitude level of a signal to an external device by controlling its amplitude level. <P>SOLUTION: The amplitude control voltage sensor includes: a detection electrode 3 installed between a center conductor 1 of a power apparatus and a casing 5; an insulator 4 installed between the detection electrode 3 and the casing 5 and having capacitance between the detection electrode 3 and the casing 5; a capacitor 8 installed in parallel to the insulator 4 between the detection electrode 3 and the casing 5 and having fixed capacitance; a variable capacity diode 9 installed in parallel to the insulator 4 between the detection electrode 3 and the casing 5 and in series to the capacitor 8 and capable of changing capacitance; and an amplitude control unit 11 which receives a signal detected by the detection electrode 3, determines the capacitance of the variable capacity diode 9 on the basis of the amplitude level of the signal, outputs a voltage for controlling the capacitance of the variable capacity diode 9, thereby controlling and outputting the amplitude level of the signal to an external device. <P>COPYRIGHT: (C)2013,JPO&INPIT |
