怀来地震台伸缩仪EW向改进试验  

The Experimental Reconstruction of the Extensometer in Huailai Seismostation

作　　者：范金梅[1] 李海孝[1] 蒋翠荣[2] 任佳[2] 王长江[2] 

机构地区：[1]河北省地震局怀来地震台,河北怀来075400 [2]河北省地震局张家口中心台,河北张家口075000

出　　处：《华北地震科学》2009年第4期56-58,共3页North China Earthquake Sciences

摘　　要：对怀来台伸缩仪EW向基线固定端、传感器进行布设改进试验,将原有28 m长基线改为两段短基线(东段:14.6 m,西段:13.4 m)。改进后,两条短基线取得了较好的观测成果,其中东段基线改造效果非常明显,观测曲线干扰减少,光滑度显著提高,观测数据精度明显优于改造前的观测数据。这次改造试验解决了困扰怀来台多年的难题。An experimental reconstruction of the disposal of the extensometer （EW： base line, fixed end and sensor） is made in Huailai Station. The precision of observational data at extensometer before and after reconstruction are compared. The mean value of the relative error in 2008 is 0. 094 8, and is better than in 2007（before the reconstruction）. Meanwhile, the interferences are decreased significantly. Resultshow that the effects are significant after the reconstruction.

关 键 词：伸缩仪 基线 固定端 改进试验 

分 类 号：P315.72[天文地球—地震学]