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회전형 Field Mill을 이용한 뇌경보장치 개발에 관한 연구
천상규,송재용,길경석 한국해양대학교 산업기술연구소 2001 연구논문집 Vol.18 No.-
An objection of this study is to develop a lightning warning system based on the measurement of electric field intensity on the ground level. The lightning warning system consists of the rotation-type field mill as an electric field sensor, an impedance changer, and a two-stage amplifier. From the calibration experiment, the frequency bandwidth and the maximum resolution of the field mill are DC ∼ 200 [Hz] and 73 [V/m], respectively. It can measured the electric field strength up to about 18.7 [kV/m]. To ensure the sensing ability of the developed lightning warning system In the actual situation, computer simulation using thundercloud models was carried out, and the result showed that the system can monitor the movement of thunderclouds within 6[km] from the observation site.
천상규,송재용,길경석 한국해양대학교 산업기술연구소 2001 연구논문집 Vol.18 No.-
This paper describes a rotation-type field mill to measure the electric field intensity caused by thunderclouds on the ground level. The field mill developed is consisted of two isolated electrode vanes, a grounded stator and a rotor. To develop a high sensitive field mill, the principles and design rules of a rotation-type field mill are studied. Also, two types of calibration system, such as a cylindrical guard electrodes and a parallel-plate electrodes, are proposed to determine the sensitivity and frequency bandwidth of the field mill. From the calibration experiment, the frequency bandwidth and the sensitivity of the field mill are DC ∼ 200 (Hz) and 0.267 (mV/V/m), respectively Therefore, it can measure the electric field intensity from 73 [V/m] to 18.7 [kV/m].