| 摘要 |
PURPOSE:To observe exactly a thunderbolt and its direction, by measuring the variation of a magnetic field due to lightening discharge, through two antennas in orthogonal azimuth. CONSTITUTION:The variation of a magnetic field paralleled to the ground surface based on electric discharge being vertical to the ground surface by a thunderbolt is detected by a receiving circuit 100 provided with two antennas orthogonal in east and west, and south and north azimuths. Also, a detecting output exceeding a prescribed value is divided into logic analyzing information and output information by an analog circuit 200, and they are applied to a logic circuit 300 and an output controlling circuit 400 for forming an A/D converter, respectively. Subsequently, the circuit 400 is controlled through a peak value detecting signal which the circuit 300 outputs, and peak output information corresponding to a thunderbolt is generated from the circuit 400, is discriminated from pre-driving electric discharge, etc. by an output device 500, the thunderbolt is observed exactly, and also the azimuth of the thunderbolt is observed through a azimuth detecting device 600. |
