基于分体悬挂式球形线圈的质子矢量磁场测量仪  

Proton vector magnetometer based on split-suspension spherical coil

作　　者：居海华[1] 夏忠[1] 宫杰[1] 应允翔 张岑[1] Ju Haihua;Xia Zhong;Gong Jie;Ying Yunxiang;Zhang Cen(Jiangsu Earhquake Agency,Nanjing 210014,China;Anhui Earthquake Agency,Hefei 230071,China)

机构地区：[1]江苏省地震局,南京210014 [2]安徽省地震局,合肥230071

出　　处：《仪器仪表学报》2022年第7期17-25,共9页Chinese Journal of Scientific Instrument

基　　金：中国大陆综合地球物理场观测仪器研发专项(Y201702);中国地震局地震科技星火计划项目(XH211003);徐州市重点研发计划(社会发展)(KC20185)项目资助。

摘　　要：为解决座钟式矢量磁力仪长期稳定性差,以及一体化悬挂式球形分量线圈相互干扰、分量噪声大等实际问题,提出了基于分体悬挂式球形线圈的质子矢量磁场测量仪,详细介绍其测量原理及仪器结构。此外设计了低成本简易观测仓,两套样机在蒙城地震台开展了一年的对比观测实验。结果表明,仪器Ⅰ总强度、水平分量和磁偏角噪声为0.23 nT、0.24 nT、2.97″,仪器Ⅱ为0.28 nT、0.26 nT、3.29″,均优于台网平均噪声水平,其中仪器Ⅰ总强度和水平分量噪声优于台网最低噪声。两套仪器水平分量基线偏离最大为6.5 nT、4.7 nT,磁偏角基线偏离最大为0.67′、0.54′,明显小于座钟式磁力仪平均水平,具有良好稳定性。To solve the practical problems such as poor long-term stability and large zero drift of clock-type vector magnetometer, mutual interference and high component noise of integrated suspended spherical coils, a proton vector magnetometer based on split-suspension spherical coil is proposed. The measuring principle and instrument structure are emphatically introduced. In addition, a new type of low-cost simple observation chamber is designed, and an one-year comparative observation experiment is implemented at Mengcheng seismic station using the two successfully developed prototypes. Results show that, total field noise, horizontal component noise and magnetic declination noise of prototype Ⅰ are 0.23 nT, 0.24 nT, and 2.97″, and those values of prototype Ⅱ is 0.28 nT, 0.26 nT, and 3.29″, which are lower than the average noise level of national network. The total field noise and horizontal component noise of prototype Ⅰ are better than the lowest noise of the network. The maximum horizontal components baseline deviation of two prototypes in a year is 6.5 nT and 4.7 nT, respectively. The maximum baseline deviation values of magnetic declination are 0.67′ and 0.54′, which are obviously lower than the baseline deviation average level of clock-type vector magnetometer of the network. The proton vector magnetometer based on split-suspension spherical coil has great stability.

关 键 词：质子矢量磁力仪 分体悬挂 简易观测仓 噪声水平 基线偏离值 

分 类 号：TH762[机械工程—仪器科学与技术]