【摘要】 电磁扰动方法作为捕捉地震短临异常的较好方法之一,受到国内外地震学家的广泛重视.在没有电磁事件时,观测仪器记录到的是没有规则的背景电磁场,无法确定观测系统运作是否正常.本文按照《地震地电观测方法——电磁扰动观测》(DB/T35-2009)标准要求,研发了基于直接数字合成(DDS)技术的电磁扰动观测系统检查装置,目前已成功应用到了观测台站.台站每月定期启动检查装置,确定电磁扰动观测系统日常工作是否正常;在记录到一些异常事件后,也可以及时启动检查装置,为判别异常事件提供技术支持.更多还原

【Abstract】 As one of the important means for earthquake precursor observation, electro-magnetic disturbance observation has drawn considerable attention of seismologists both at home and abroad. When no electro-magnetic events occurred, observation instruments could only record chaotic electro-magnetic field, so we could not confirm whether the instruments were working properly or not. For this reason, we developed an inspection equipment in accordance with the electro-magnetic disturbance observation standard enacted by China Earthquake Administration, and applied it at stations successfully. The inspection instrument is started each month to check regularly the electro-magnetic disturbance observation system, providing technical support for the identification of anomalous events.更多还原