摘要
在随钻测量中,地磁矢量是解算方位角的关键信息,但地磁测量时,容易受到磁干扰的影响,为进一步提高方位角测量精度,提出了基于等效旋转调制的地磁提取算法。首先概述了地磁向量的误差模型;根据随钻测量环境特征设计了旋转随钻测量系统方案;并根据多测点的统计信息设计了统计卡尔曼滤波器对地磁参数进行估计。最后通过自主研发的磁惯性测量模块进行模拟物理实验和旋转钻进实验。实验表明:基于等效旋转调制的地磁提取算法能够将方位角的绝对误差从椭球拟合的4.88°,降低至0.45°。
The geomagnetic vector is the key information to solve the azimuth angle in the measurement while drilling(MWD),but in the geomagnetic measurement,it is easily affected by magnetic interference.In order to further improve the measurement accuracy of azimuth,a geomagnetic extraction algorithm based on equivalent rotation modulation is proposed.Firstly,the error model of the geomagnetic vector is analyzed and constructed.And then,the scheme of the rotary measurement while drilling system is constructed.According to the statistical information of multiple measuring points,a statistical Kalman filter is designed to estimate the geomagnetic parameters.Finally,the self-developed magnetic inertial measurement module is used to simulate physical experiment and rotary drilling experiment.Experiments show that the geomagnetic extraction algorithm based on equivalent rotation modulation can reduce the absolute error of the azimuth angle from 4.88°of ellipsoid fitting to 0.45°.
作者
杨金显
王亚平
王蒙蒙
YANG Jinxian;WANG Yaping;WANG Mengmeng(Navigation and Guidance Laboratory,School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China)
出处
《传感器与微系统》
CSCD
北大核心
2021年第11期103-107,共5页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(41672363,U1404510)。
关键词
随钻测量
等效旋转调制
统计卡尔曼滤波
地磁提取
方位角
measurement while drilling(MWD)
equivalent rotation modulation
statistical Kalman filtering(SKF)
geomagnetic extraction
azimuth
