| Title |
A Methodology of Finding the Direction of Lightning Discharge using Loop-type Magnetic Field Sensors |
| Authors |
Bok-Hee Lee ; Chi-Youn Cho ; Sung-Chul Cho |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2014.28.10.063 |
| Keywords |
Thunderstorm ; Time-varying Magnetic Field ; Lightning Discharge ; Direction Finding ; Loop-type Magnetic Field Sensor ; Active Integrator ; Differential Amplifier |
| Abstract |
This paper deals with a methodology that applies the time-varying magnetic fields produced by the cloud discharges to find the direction of thunderstorm movement. We investigated the basic performance of the magnetic field measurement system composed of multi-turn loop-type sensors, the differential amplifier and active integrator. As a result, the response characteristics of the magnetic field sensor system to sinusoidal signals was excellent. The frequency bandwidth ranges from about 1 kHz to 500 kHz, the response sensitivity was 0.16mV/nT. In addition, we proposed the algorithm that determines the direction of lightning discharges using the comparison of the output signals of right-angled loop-type magnetic field sensors. The accuracy of the direction finding of lightning discharges is fairly well within the measurement error of less than 5°. The magnetic field measurement system proposed in this work can be used to track the direction of thunderstorm movement. |