航磁全轴总场梯度系统补偿算法研究  

Research on Compensation Algorithm of Three Axis Gradient Aeromagnetic Prospecting System

作　　者：吴佩霖[1,2,3] 张群英 李光[1,2,3] 刘丽华[1,3] 方广有 

机构地区：[1]中国科学院电磁辐射与探测技术重点实验室,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院电子学研究所,北京100190

出　　处：《电子与信息学报》2017年第12期3030-3038,共9页Journal of Electronics & Information Technology

基　　金：国家重大科研装备研制项目(ZDYZ2012-1-03)~~

摘　　要：航空磁法勘探是一种高效、便捷的地球物理勘探方法。使用多个光泵磁力仪实现全轴梯度测量是航空磁法勘探中的一种重要手段。该文针对无人机飞行平台设计了一种航磁全轴总场梯度测量系统,并提出使用前馈网络的方法来实现航磁数据的补偿。系统通过4个光泵磁力仪获得全轴总场梯度数据,经过前馈网络实现数据补偿后,全轴总场梯度数据补偿质量的提升比分别为15.2,4.7和5.9,数据峰值信噪比的提升分别为17.1 d B,6.5 d B和6.5 d B,交叉标定系数表明前馈网络具有很好的泛化性能。实验结果验证了该文采用的全轴梯度系统和数据补偿方法的正确性和有效性,能够有效地应用于高精度航磁勘探领域。Aeromagnetic prospecting is an important method in geophysical prospecting for its high-efficiency and convenience. In the paper, a new kind of the three axis gradient system based on the unmanned helicopter is designed and an aeromagnetic compensation method based on the neural network is proposed. The system is equipped with four Optically Pumped Magnetometers （OPMs）, from which the three axis gradient data can be achieved. In aeromagnetic compensation, the feedforward network is used. The Improvement Ratio （IR） of the three axis gradient data is 15.2, 4.7 and 5.9, respectively. The Peak Signal to Noise Ratio （PSNR） of the three axis gradient data is improved by 17.1 dB, 6.5 dB and 6.5 dB, respectively. Through the result of the Cross Calibration Index （CCI）, the generalization ability of the method is good. The three axis gradient system and the aeromagnetic compensation are proven valid in aeromagnetic prospecting by an experiment.

关 键 词：地球物理勘探 全轴磁总场梯度 航磁补偿 光泵磁力仪 无人直升机 

分 类 号：TH762.3[机械工程—仪器科学与技术]