| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost device for detecting abnormality of a shield member aimed at improvement in the detection accuracy. SOLUTION: Both ends of copper tape 13 of a plurality of CV cables 101-103 are connected to each other. By changing a selector switch SW, a current transformer CT1 is connected to an alternating-current power supply 31, to make alternating current flow through the copper tape 13, and current transformers CT2 and CT3 are connected to an FFT waveform analyzer 22. Thus, the FFT waveform analyzer 22 extracts the frequency component of the alternating-current power supply 31 from electromotive force from the current transformers CT2 and CT3, according to the current flowing through the copper tape 13 of the CV cables 102 and 103 and displays it. Next, by changing the selector switch SW, the current transformer CT2 is connected to the alternating-current power supply 31, and the current transformers CT1 and CT3 are connected to the FFT waveform analyzer 22. Then, by changing the selector switch SW, the current transformer CT3 is connected to the alternating-current power supply 31, and the current transformers CT1 and CT2 are connected to the FFT waveform analyzer 22. COPYRIGHT: (C)2011,JPO&INPIT
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