涉县地震台伸缩仪EW向观测精度的提高途径

STUDY ON OBSERVATION ACCURACY OF EXTENSOMETER IN SHEXIAN SEISMOSTATION

摘要: 涉县地震台伸缩仪EW向自2001年数字化改造以来,其观测精度呈逐年下降的趋势,为了找出原因并解决这个问题,我们从改造供电系统、加强洞室密封、改进避雷措施、更换仪器传感系统等方面展开工作,有效地去除了伸缩仪观测曲线的"毛刺"现象,杜绝了雷害,提高了伸缩仪EW向的观测精度。

Abstract: Since 2001, the observation accuracy of the EW component of extensometer in Shexian seismostation decreased year by year.In order to find the cause and solve the problem, we reformed the power supply system, enhanced the sealing property of the observation cave room and improved the lightning protection measure.Through these methods, the observation accuracy of the EW component of extensometer in Shexian seismostation was obviously improved.