摘要
为了研究电磁信号是否能作为一种可靠的地震前兆信号,设计了一种基于感应式磁传感器用于地震监测的电磁传感探头。该探头电路由前端信号处理电路和后端采集电路组成,可支持频段为10 Hz^10 kHz,0.1~1000 nT较宽动态范围的甚低频、超低频电磁波段的电磁信号采集,灵敏度大于20 mV/nT@0.1 Hz^10 kHz,18位分辨率,并通过了多项可靠性测试。此外,该探头已经应用到包括川滇国家试验场在内的221个台站中的电磁监测中。现场观测实验表明,该电磁传感探头能有效捕捉到高度相关的电磁信号。
In order to study whether the electromagnetic signal can be used as a reliable earthquake precursor signal,an electromagnetic sensing probe based on inductive magnetic sensor for earthquake monitoring is designed.The probe is composed of a signal processing and an acquisition circuit,which can support electromagnetic signal acquisition in very low frequency(VLF)and ultra low frequency(ULF)from 10 Hz^10 kHz in a wide dynamic range 0.1~1000 nT.The sensitivity of the probe is greater than 20 mV/nT@0.1 Hz^10 kHz,18-bit resolution.Besides,the probe has passed many reliability tests and has been applied to 221 stations including the Sichuan and Yunnan National Test site for electromagnetic monitoring.Field observation experiments show that the probe can capture a highly correlated electromagnetic signal effectively.
作者
何春舅
雍珊珊
王新安
He Chunjiu;Yong Shanshan;Wang Xin′an(The Key Laboratory of Integrated Micro-systems,Peking University Shenzhen Graduate School,Shenzhen 518055,China;The Research Center of Earthquake Monitoring and Forecasting Technology,Peking University Shenzhen Graduate School,Shenzhen 518055,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2020年第4期90-95,共6页
Journal of Electronic Measurement and Instrumentation
基金
深圳市科技计划(KJYY20170721151955849)资助项目。
关键词
AETA
地震监测
电磁扰动
磁传感器
AETA
seismic monitoring
electromagnetic disturbance
magnetic sensor
