水管仪和洞体应变仪雷击差异情况分析及解决方法  

The Difference Analysis and Solutions of Lightnining Strike Between Water Pipe Instrument and Cave Strainmeter

作　　者：王欣 顾娜[1] 崔政东 薛伟 戴瑾[1] WANG Xin;GU Na;CUI Zheng-dong;XUE Wei;DAI Jin(Liaoning Earthquake Agency,Liaoning Shenyang 110034,China)

机构地区：[1]辽宁省地震局,辽宁沈阳110034

出　　处：《防灾减灾学报》2022年第3期48-52,共5页Journal of Disaster Prevention And Reduction

摘　　要：针对铁岭龙首山观测站水管倾斜仪与洞体应变仪前置放大盒遭受雷击造成差异性损坏的事件,对两套仪器的观测背景、前置放大盒供电情况、传感器采集情况等多方面进行研究分析,结果表明,损坏伸缩仪前置放大盒芯片的电流方向来自传感器,可通过在伸缩仪金属铟瓦棒接地导流和传感器与前置盒连接处加限流模块两种思路解决雷击问题。该方法不仅可为日后的维修节省了人力和物力,而且也保证了仪器产出数据的连续和完整。The front end of the Tube tiltmeter and the expansion tunnel strain gauge at Longshoushan observation station in Tieling were frequently damaged by lightning,the problem that the apparatus of the same tank and the same side water pipe is almost immune to the lightning stroke.By analyzing the observation background of the two sets of instruments,the power supply of the pre-amplifier box and the collection of the sensors,the instantaneous current direction of the extensometer can be determined from the location of the damaged chips.The lightning stroke problem is solved by two methods:the Earth conduction of the metal indium tile rod of the extensometer and the current limiting module added at the connection of the sensor and the front box.It not only saves manpower and material resources for future maintenance,but also guarantees the continuity and integrity of instrument output data.

关 键 词：雷害 差动变压器 电流方向 前置放大器 

分 类 号：P315.62[天文地球—地震学]