A Novel Measuring Instrument for the Progressing Feature of Long Airgap Discharge by Means of Opto-Electronic Technique

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  • 光エレクトロニクスを応用した放電現象観測装置
  • ヒカリ エレクトロニクス オ オウヨウシタ ホウデン ゲンショウ カンソク ソ

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In order to observe the progressing manner of the spark discharge along a long gap, a high speed streaking camera or an image converter camera has been used, but they are not available in the daytime and need a man-power to exchange a film. By the aid of recent opto-electronic techniques, the authors developed a novel measuring instrument, which does not need man-power and can be used even in the daytime.<br>This system converts light signals to electrical ones by 1, 600 pin-photo-diodes. Electrical signals are amplified and decomposed into 16-step signal strength. The fastest sampling time of memory is 0.1μsecond and the number of frames is 16, 000. A personal computer is used for controlling the whole system and can output the data in the various manners. <br>Using this system, the developing manner of leaders was observed for the impulse voltage test clearly and that of lightning discharges in winter seasons was observed in the coastal area of the Japan Sea.

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