安防监控系统摄像头屡遭雷击原因分析与措施安防监控系统摄像头屡遭雷击原因分析与措施.pdfVIP

Journal of Security and Safety Technology 安防技术, 2014, 2, 26-36 Published Online September 2014 in Hans. /journal/jsst /10.12677/jsst.2014.23005 Cause Analysis and Measures of the Camera Struck Repeatedly by Lightning in Security Monitoring System Mingzuo Luo, Yi Deng, Xiaohong Wu, Genyuan Xu, Lei Shi, Chuan Sun Ziyang Meteorological Bureau, Ziyang City Email: laoluo35@ nd th th Received: Aug. 22 , 2014; revised: Sep. 4 , 2014; accepted: Sep. 12 , 2014 Copyright © 2014 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract This paper analyzes the lightning data of the security monitoring system in the scope of lightning site. The results show that the frequency of thunderstroke in the two years is up to 17 times at the range of 500 meters. Among them, there is only 1 time that the rolling sphere radius of lightning current is larger than the average distance from the lightning point. There are 15 times that lightning impulse electromagnetic induction intensity in LPZ0B area is not less than 0.07 × 10−4 T, which is 88.2% of the total amount, and there are 6 times that lightning impulse electromagnetic induction intensity in LPZ1 area is not less than 0.07 × 10−4 T, which accounts for 35.3% of the to- tal amount. From the results, it is proved that the indoor and outdoor cameras are unlikely to suf- fer direct lightning flash strike, and in most cases cameras are subjected to inductive lightning, which is the main reason of the camera repeatedly struck by lightning. Therefore, the study has some guidance to the lightning protection of the security camera moni