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火星车磁通门磁强计技术
赵琳1,2, 杜爱民1,2,3, 乔东海4, 孙树全1,2, 张莹1,2,3, 区家明1,2, 郭志芳1,2, 李智1,2, 冯晓1,2, 顾少燃4, 李峰4
1.中国科学院 地质与地球物理研究所 地球与行星物理重点实验室, 北京100029;2.中国科学院 地球科学研究院, 北京 100029;3.中国科学院大学, 北京 100049;4.苏州大学, 苏州 215006
摘要:
火星磁场测量是国际火星探测任务的焦点之一,中国首次火星磁测任务通过在巡视器(即火星车)和环绕器上同时搭载磁强计,实现对火星磁场的火-空联合观测。巡视器磁强计载荷选用双探头三轴磁通门磁强计,采用亥姆霍兹补偿线圈型探头技术和全数字闭环反馈电路技术,实现空间磁场的高精度同点测量。单机在设计上考虑了可靠性安全性设计和空间环境适应性设计。经地面标定,单机量程可达到±6.5万nT,噪声水平优于0.01 nT/√Hz,分辨率达到了0.01 nT。
关键词:  磁通门;磁强计;火星磁场测量
DOI:10.15982/j.issn.2095-7777.2018.05.010
分类号:TP212.2
基金项目:
The ROVER Fluxgate Magnetometer
ZHAO Lin1,2, DU Aimin1,2,3, QIAO Donghai4, SUN Shuquan1,2, ZHANG Ying1,2,3, OU Jiaming1,2, GUO Zhifang1,2, LI Zhi1,2, FENG Xiao1,2, GU Shaoran4, LI Feng4
1.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2.Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China;3.University of Chinese Academy of Sciences, Beijing 100049, China;4.Soochow University, Suzhou 215006, China
Abstract:
Martian magnetic field measurement is one of the focuses of international Mars exploration mission. China's first Mars magnetic measurement mission would carry magnetometers on the rover and the orbiter to achieve joint observation of the surface magnetic field and the spatial magnetic field. Dual tri-axial fluxgate magnetometer would be carried on the rover,which adopts Helmholtz compensation coil probe technology and all digital closed-loop feedback circuit technology to realize high precision same-point measurement of space magnetic field. Reliability, safety and space environment adaptability of the instrument are well considered in the design. According to ground calibration, the range of the ROVER fluxgate magnetometer is ±65 000 nT,the noise level is 0.01 nT/√Hz,and the resolution achieves 0.01 nT.
Key words:  fluxgate;magnetometer;Marian magnetic field measurement