뇌방전에 의한 유도전압의 측정에 대한 기초적 연구

초록

Abstract This paper deals with the device for measuring the time-varying magnetic fields and induced voltages caused by lightning discharges. The two magnetic field measuring systems were designed and made. One consists of the loop-type magnetic field sensor with the active integrator operated by a differential amplifier. The other consists of the loop-type magnetic field being measured, and the signal detected is integrated by the LabVIEW software. As a consequence, from the calibration experiments, the frequency bandwidth of the full measuring system ranges from 400[Hz] to 1[MHz] and the response sensitivity are 0.98[mV/nT] and 2.2[mV/nT] for the magnetic field sensor of 2 turns and 6 turns, respectively. Also, the results obtained by the two measuring devices well agreed with each other.