仪器标定格值变化对钻孔应变观测数据的影响

以巴南地震台钻孔应变某一时段观测资料异常变化为例,指出观测仪器元件标定格值是影响钻孔应变观测数据的重要参数,与固体潮汐幅度成反比例关系,且格值变化也可能是改变钻孔应变趋势形态的一种因素。文中分析格值与应变观测数据之间的物理机制,校正恢复异常时段观测曲线,为钻孔应变异常干扰识别工作提供参考。

The influence of the change of the instrument calibration value on the borehole strain observation data

In this paper, taking the abnormal period of borehole strain data recorded at Banan Seismic Station as example, the signifcance of the calibration value of instrument element as an important parameter of observed data of borehole strain and the inverse proportion relationship with the amplitude of solid tide is represented. Sometimes, the change of calibration may be a factor of the trend change of strain curve. the physical mechanisms between calibration and strain observation data is analyzed, and the abnormal data of borehole strain data are corrected. The method provids an effective reference to identify abnormal data of borehole strain.