航磁补偿系统延迟偏差补偿方法研究  

Aeromagnetic compensation method for the interference magnetic fields caused by system delay

作　　者：吴佩霖[1,2,3] 黄玲[1,3] 张群英[1,3] 方广有[1,3] 

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：《仪器仪表学报》2017年第6期1447-1457,共11页Chinese Journal of Scientific Instrument

基　　金：国家重大科研装备研制项目(ZDYZ2012-1-03)资助

摘　　要：航空磁法勘探是一种重要的地球物理勘探方法,由于飞机磁干扰会对光泵磁力仪测量的数据产生严重的影响,因此有效的补偿飞机磁干扰具有重要的意义。提出了一种非线性航磁补偿方法,通过对信号时间序列的加权,实现对当前时刻输出信号的预测,通过L-M(Levenberg-Marquardt)算法求解修正同步误差后的非线性航磁补偿模型。仿真结果表明,该非线性航磁补偿方法可有效的解决传统航磁补偿方法无法补偿通道间延迟的问题,有效地降低各类信号延迟导致的补偿偏差,补偿后信号的标准差降低至10-4n T/m量级,该剩余残差水平与光泵磁力仪的本底噪声处于同一量级,符合高精度航磁勘探的要求。通过野外模拟飞行实验对理论分析和仿真结果进行了验证。Aeromagnetic exploration is an essential issue in the geophysics. The data measured by optically pumped magnetometers （OPM） is seriously affected by the interference magnetic fields generated by the aircraft. Therefore, aeromagnetic compensation is very essential, and a nonlinearity aeromagnetic compensation method is proposed. Firstly, the weighted signal sequences are used to predict the output of the sensors. Then, Levenberg-Marquardt （L-M） algorithm is utilized to realize aeromagnetic compensation. The simulation results show that the nonlinearity aeromagnetic compensation method is effective to the interference magnetic fields caused by the delay between the sensors. The standard deviation of the compensated signal is decreased to 10^-4nT/m. The residual error of the compensation signal is the same order as the noise floor of the OPMs. The proposed method can be applied to obtain high-quality aeromagnetic survey data. A field experiment is carried out to prove the validities of the theoretical analysis and the simulation results.

关 键 词：航磁勘探 航磁补偿 光泵磁力仪 L-M算法 

分 类 号：TH762.3[机械工程—仪器科学与技术]