CURRENT WAVEFORM MEASURING DEVICE AND CURRENT WAVEFORM MEASURING METHOD

PROBLEM TO BE SOLVED: To provide a current waveform measuring device and a current waveform measuring method, capable of effectively measuring AC current.SOLUTION: According to an embodiment, a current waveform measuring device comprises a contact zero cross detecting unit, a non-contact zero cross...

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Bibliographische Detailangaben
Hauptverfasser: SUZUKI YASUNAO, KOZAI MASAKI, MARUYAMA MASAHITO, TAKATANI KAZUHIRO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a current waveform measuring device and a current waveform measuring method, capable of effectively measuring AC current.SOLUTION: According to an embodiment, a current waveform measuring device comprises a contact zero cross detecting unit, a non-contact zero cross detecting unit, a measuring unit, a current measurement start timing calculating unit, and a current measuring unit. The measuring unit measures delay time of the voltage measured by a non-contact voltage probe on the basis of a timing of the zero cross detected by the zero cross detecting unit and a timing of the zero cross detected by the non-contact zero cross detecting unit. The current measurement start timing calculating unit outputs a trigger for starting the measurement of the AC current on the basis of the delay time and the timing of the zero cross of the voltage measured by the non-contact voltage probe. The current measuring unit starts measurement of the AC current when the current measurement start timing calculating unit outputs the trigger.SELECTED DRAWING: Figure 1 【課題】効果的に交流電流を測定することができる電流波形測定装置、及び、電流波形測定方法を提供する。【解決手段】実施形態によれば、電流波形測定装置は、接触ゼロクロス検出部と、非接触ゼロクロス検出部と、測定部と、電流測定開始タイミング算出部と、電流測定部と、を備える。測定部は、前記接触ゼロクロス検出部が検出したゼロクロスのタイミングと前記非接触ゼロクロス検出部が検出したゼロクロスのタイミングとに基づいて前記非接触電圧プローブで測定される電圧の遅れ時間を測定する。電流測定開始タイミング算出部は、前記遅れ時間と前記非接触電圧プローブで測定される電圧のゼロクロスのタイミングとに基づいて、前記交流電流の測定を開始させるトリガを出力する。電流測定部は、前記電流測定開始タイミング算出部が前記トリガを出力すると、前記交流電流の測定を開始する。【選択図】図1