2021年山东菏泽地电场观测数据异常识别及干扰排除

Abnormal Data Recognition and Interference Elimination in the 2021 Geoelectric Field Observations in Heze,Shandong

2021年9月至2022年2月期间菏泽地电场观测数据出现异常变化,台站工作人员通过对观测系统、外装置系统、电极、观测室用电线路巡检、测试和主备机对比观测等方式,查找干扰源,在排除地球物理场异常变化后,认为此次数据异常变化是由电极老化和电极引线与外线路接线处接触不良造成的。

From September 2021 to February 2022,abnormal changes were observed in the geoelectric field observation data in Heze.To identify the cause of the anomalies,station personnel conducted anomaly recognition and interference elimination work.Through inspections,tests,and comparisons between the main and backup systems of the observation system,external device system,electrodes,and electrical circuits in the observation room,interference sources were identified.After eliminating abnormal changes in the geophysical field,it was determined that the abnormal data variation was caused by electrode aging and poor contact between the electrode lead and external circuits.