Kyushu Institute of Technology

Yuki Yamaguchi

Shinya Ohtsuka

Hiroyuki Tsubata

Masaaki Furukawa

In a non-contact discharge test performed in a poor electromagnetic noise environment, the energy of discharge is evaluated by detecting weak light emission and processing the intensity waveform of light emission of the discharge. A database is created by measuring the intensity waveform of light emission of discharge generated as a result of application of a voltage or current to a measurement object through use of a light emission measuring device, simultaneously measuring the current waveform of the discharge through use of a current measuring device, and storing in the database the relation between analysis data sets obtained through analysis of the waveforms on the basis of information of the voltage or current applied to the measurement object. The intensity waveform of the light emission of the discharge or spark generated from the measurement object is measured while an electromagnetic wave generated as a result of the discharge of the measurement object is used as a reference. The magnitude of the discharge is estimated as a value by comparing light emission data obtained through analysis of the intensity waveform with the data recorded in the database.

Non-contact discharge test method and device

The magnitude (charge quantity) and energy of discharge are obtained by optical measurement based on light emission, and are evaluated. A discharge source is caused to emit discharge light by applying a voltage to the discharge source from a known power supply, the intensity waveform of the discharge light emission is measured using a light receiving element, the waveform of discharge current is simultaneously measured using a current conversion probe or a current waveform detector, and a database is created in which a relation with analysis data sets obtained by analyzing the waveforms is recorded in consideration of applied power information. The intensity waveform of discharge light emission from a piece of equipment under measurement is measured using the light receiving element, and light emission data obtained by analyzing the waveform is compared with the data recorded in the database so as to estimate the magnitude of discharge as a value.

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Fukuoka, Japan

Yuki Yamaguchi