自动气象站防雷板的安全性

Security on lightning protection board of automatic weather station

防雷板防雷器件主要是气体放电管和齐纳二极管,部分防雷板的线路设计时没有充分考虑雷电泄流对信号的影响,雷电状态下,尽管防雷器件能够完成规定的动作,但也有可能造成二次雷电感应,在雷电泄放的通道上形成不利的电磁感应场。本文分析了现有防雷板线路存在的利弊,并提出了改进防雷板结构措施,以提高其防雷效果。

The lightning protection device is mainly composed of gas discharge tube and zener diode.Parts of lightning protection circuit are not designed in the consideration of the effect of lightning leakage on the signal.Under the lightning condition,lightning protection devices are able to work,but it is probably to cause secondary lightning induction that formed negative electromagnetic induction field in the lightning discharge channel.This paper analyses the disadvantages of existing lightning protection circuit and points out the measures to improve the structure of lightning protection board that can enhance its lightning protection effect.