海底三分量磁力仪载体固有磁性的现场校正算法  

In-situ calibration algorithm of intrinsic magnetism for seafloor three-component magnetometer

作　　者：章雪挺[1,2] 陈鹰[1] 唐勇[3] 刘敬彪[2] 

机构地区：[1]浙江大学流体传动与控制国家重点实验室,杭州310027 [2]杭州电子科技大学,杭州310018 [3]国家海洋局第二海洋研究所,杭州310012

出　　处：《仪器仪表学报》2014年第7期1497-1509,共13页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(41006060)资助项目

摘　　要：传统的磁力仪校正一般在实验室中完成,但在海底三分量磁力仪的实际应用中发现,搭载磁力仪的运载体本体磁性干扰使实验室校正过程失去了意义。针对海底拖曳式三分量磁力仪在实际应用过程中由载体固有磁性引起的方向误差问题,提出了一种基于三维椭球误差模型和平差理论的误差校正技术。并在此基础上,以中国大洋航次现场数据为研究对象,给出了具体的现场数据校正方法与流程。最后,通过随机生成的多个不同特征数据源,对提出的校正算法进行了比对评估与定性分析,并给出了改进优化思路。Traditionally, the calibration of magnetometer is accomplished in laboratory; however, in the actual application of deep-ocean three component magnetometer it is found that the magnetic interference of the vehicle carrying the magnetometer makes the laboratory calibration meaningless. Aiming at the directional error caused by the intrinsic magnetism of the carrying vehicle, a new calibration method based on 3-D ellipsoidal error model and measurement adjustment theory is proposed in this paper. Furthermore, the in-situ calibration algorithm and operation procedure are presented in detail taking the field data from China Open-sea Scientific Investigation Cruise as the studying object. At last, the calibration algorithm proposed in this paper was qualitatively evaluated and analyzed using the data sources with different characteristics generated randomly on a PC; and the idea for further algorithm improvement and optimization is also given.

关 键 词：磁力仪 现场校正 椭球面 拟合 

分 类 号：TH766[机械工程—仪器科学与技术]