What is the cause of lightning rod

Conventional anti-lightning can be divided into direct strike lightning and the comprehensive anti induction Thunder and lightning. Lightning lightning strike-proof device generally consists of three parts, namely jieshan, wire and grounding; jieshan divides into the lightning rod, lightning, lightning, lightning network. To lightning rod as received Flash device of anti-lightning principle is: lightning rod through wire access underground, and ground formed, potential poor, using itself of height, makes farm strength increased to limit value of lightning cloud farm occurred distortion, began ionization and down pilot discharge; lightning rod in strong farm role Xia produced tip discharge, formed up pilot discharge; both joined formed lightning pathway, with of Epsom into Earth, reached avoidance mine effect. In fact, lightning is a lightning pin around and early discharge of lightning, lightning current through grounding conductor to ground, avoid direct lightning protection.