SS-Y型伸缩仪观测问题分析及优化方法探讨

SS-Y型伸缩仪在我国地震洞体形变监测台网中已安装使用多年。对地球固体潮观测而言,仪器观测资料精度高且长期稳定性较好,但从地震预测的观测需求来看,SS-Y型伸缩仪仍然存在很多不足,如高频信息缺失、抗干扰能力较弱、存在格值误差、自校验能力较差等。对伸缩仪存在的问题进行分析,并提出一种超宽频带短基线伸缩仪的设计思路,以期为后续新仪器的研制提供理论依据。

Analysis of observation problems and discussion of optimum methodfor SS-Y extensometer

SS-Y extensometer has been installed and used for many years in China seismic precursor monitoring network.For earth tide observation,the instrument has high accuracy and good long-term stability.However,according to the observation demand of earthquake prediction,SS-Y extensometer still has many problems,such as lack of high frequency information,weak anti-interference ability,existence of lattice error,poor self-calibration ability and so on.This paper will analyses these problems of extensometer,and propose a design idea of ultra-wideband and short baseline extensometer,which provides theoretical support for the subsequent development of new instruments.