CONTRASTIVE ANALYSIS OF OBSERVATIONAL RESULTSOF THREE KINDS OF EXTENSOMETER
Deng Jiangang 1,2) ; and Sun Lingli 1,2)
1)Monitoring Center of Earthquake Adminisrtation of Hube Province,Wuhan 430071;2)Key Laboratory of Earthquake Geodesy,Institute of Seismology, CEA, Wuhan 430071
Abstract：The contrastive analysis of the observational results with the extensometers of analog quartz pipe,digital quartz pipe and invar rod used now at stations are made.The results from the analysis show that the curve of the strain solid tide recorded with the two kinds of quartz pipe are clear,smooth,and they have good noise immunity,high observation accuracy,and the curve recorded with invar rod is not smooth,superposed some noise wave and distortion,so its precision is low.
