涉县地震台伸缩仪EW向观测精度的提高途径
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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。
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.
引文
[1]吕宠吾,孙亚强,杜为民,等.SS-Y型短基线伸缩仪及其标定装置[J].地壳形变与地震,2001,21(3):82-88.
    [2]中国地震局.地震及前兆数字观测技术规范[M].北京:地震出版社,2001.
    [3]张文来,罗宏江,苏萍.气压变化对SS-Y伸缩仪观测日变曲线的干扰分析[J].内陆地震,2006,20(3):266-270.
    [4]GB/T19531.3-2004地壳形变观测[S].北京:中国标准出版社,2004.

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