雷击对钻孔应变仪的损坏及机理分析  

Damage and Mechanism Analysis of Bore Strain Gauge by Lightning Stroke

作　　者：杨绍富[1] 杨峰[2] YANG Shaofu;YANG Feng(Korla Seismic Station of Earthquake Agency of Xinjiang Uygur Autonomous Region,Korla 841000,China;Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,China)

机构地区：[1]新疆维吾尔自治区地震局库尔勒地震台,新疆库尔勒841000 [2]新疆维吾尔自治区地震局,乌鲁木齐830011

出　　处：《华南地震》2018年第3期99-104,共6页South China Journal of Seismology

摘　　要：2015年7月新疆巴伦台钻孔应变仪遭雷击后出现故障,在维修过程中发现数据采集器内的通讯模块损坏,导致通讯中断,更换模块后开始有数据,但杂乱无章、错误严重。根据信号完整性理论、传输线理论和RS-485通信协议等,进一步从机理上分析了该现象产生的原因,认为雷击显著降低了井下探头内RS-485模块的驱动能力,导致接收端接收到不确定电平,造成数字通信不可靠。于是在采集器通讯模块上又加装了匹配电阻,之后数据恢复正常。该案例的典型剖析,对设备维护人员解决实际问题有一定的借鉴作用。n July 2015,the borehole strain gauge of Balun station in Xinjiang was damaged after being struck by lightning. During maintenance,it was found that the communication module in the data collector was damaged,and resulted in communication interruption. After replacing modules,data began to appear,but the disorder was very serious. According to the theory of signal integrity,the transmission line theory and the RS-485 communication protocol,the paper further analyzes the mechanism of the causes of the phenomenon,and finds that lightning significantly reduced the driving ability of down hole probe RS-485 module,and resulted in receiver uncertainty level and digital communication. Then the matching resistor was added to the collector＇s communication module,and the data returned to normal. The typical analysis of the case has a certain reference for the equipment maintenance personnel to solve practical problems.

关 键 词：氡浓度 气温 气压 短期变化 相关性 

分 类 号：P315.72[天文地球—地震学]