接地电性源空地瞬变电磁探测传感器的研制  

Development of sensor used for grounded electrical source air-ground transient electromagnetic detection

作　　者：林君[1] 符磊[2] 王言章[1,2] 徐江[2] 嵇艳鞠[2] 杨蒙蒙[2] 

机构地区：[1]吉林大学地球信息探测仪器教育部重点实验室,长春130026 [2]吉林大学仪器科学与电气工程学院,长春130026

出　　处：《吉林大学学报（工学版）》2014年第3期888-894,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：吉林省重大科技攻关项目(2012ZDGG003);国家自然科学基金项目(41274183)

摘　　要：根据一维层状模型,正演计算了探测深度为1000m时接收电磁信号的特点,进而确定了接收传感器的基本性能参数。建立了传感器的等效模型,分析了不同匹配状态下传感器的频率特性及对其灵敏度的影响。在对传感器噪声源建立等效模型的基础上,给出了影响传感器噪声水平的各噪声源随频率变化的规律,同时给出了高源阻抗下降低传感器噪声的方法。野外试验采用已知异常线圈响应对传感器的输出特性进行测试,测试结果与理论计算结果相吻合,同时其噪声特性能够满足实地探测的需要。Based on one-dimensional layer model, the signal characteristics of the detection with probing depth of 1000 m were analyzed using the forward modeling. Furthermore, the basic performance parameters of the receiver sensor were determined. The physical model of the sensor was built, the sensor frequency characteristics under different matching conditions and their impacts on sensitivity were analyzed. On the basis of constructing the equivalent model of noise sources, the variations of noise sources with frequency characteristics were given. At the same time, the solution to inhibit high source impedance was given. An anomaly coil was used in field experiment in order to test the output characteristic of the sensor. Experiment results agree with theoretical calculation, and noise characteristic of the sensor can effectively meet the detection need.

关 键 词：信息处理技术 感应式空芯线圈传感器 等效模型 噪声分析 频率特性 

分 类 号：TM937.1[电气工程—电力电子与电力传动]