| 摘要 |
<P>PROBLEM TO BE SOLVED: To build up a lightning prevention system, designed to multilaterally implement means effective to prevent hazards of lightning, based on a review of the relationship between phenomena arising when windmills, aircraft, radar bases, etc. undergo meteorological conditions causing thunderbolt in winter and phenomena occurring when these facilities/equipment are exposed to lightning fields. <P>SOLUTION: When conductivity is bestowed on a windmill, static electricity disappears from the windmill. Even if a rise in electric potential in the windmill is prevented by leaking static electricity in the windmill to the ground, however, generation of electric collision may arise due to wind or snow, so that an ionic space formed around the windmill will leave a danger of thunderbolt to the windmill. To remove this danger, it is necessary to eliminate the ionic air space or the meaning of a local existence of the ionic air space. Therefore, ions are artificially supplied from the front side of the windmill, thereby alleviating the work of static electricity in the discharge air space. Next, if ions are supplied excessively, it will spread into the air jointly with wind or snow, thereby diffusing lightning electric fields; and the lightning wind electric field, concentrated on the windmill, will be dispersed into the entire area, causing a decline in the work of the ionic air space near the windmill, and diminishing the feedback current during thunderbolt. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
