适用于浅水区工作的三分量感应式磁场传感器研制  

The development of three-component inductive magnetic field sensor suitable for shallow water work

作　　者：赵毅[1,2] 陈晓东 黄跃[1,2] 王刚 李永博[1] 赵富刚 王书民[1,2] ZHAO Yi;CHEN Xiao-Dong;HUANG Yue;WANG Gang;LI Yong-Bo;ZHAO Fu-Gang;WANG Shu-Min(Institute of Geophysical and Geochemical Exploration,CAGS,Langfang 065000,China;Key Laboratory of Geophysical Electromagnetic Detection Technology,Ministry of Natural Resources,Langfang 065000,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]自然资源部地球物理电磁法探测技术重点实验室,河北廊坊065000

出　　处：《物探与化探》2019年第6期1326-1332,共7页Geophysical and Geochemical Exploration

基　　金：中国地质科学院基本科研业务费资助项目(YYWF201732)

摘　　要：感应式磁场传感器广泛应用于地球物理电磁法勘探中,受物理原理制约,该类磁场传感器的噪声水平与其长度和体积成正比,长度通常为800~1400mm,质量在3~6kg。本文采用一种磁通聚集技术,突破了传统感应式磁场传感器的设计瓶颈,能大幅度降低传感器的长度,研制的用于AMT方法的超小型感应式磁场传感器单个分量长度<240 mm,长度约为传统AMT磁场传感器的30%,直径<110 mm,质量约3 kg,工作频率范围为0.1 Hz^10 kHz,噪声水平在1 Hz处为0.8 pT√Hz。将三个参数相同的磁场传感器相互垂直安装到一块底板上,构成三分量感应式磁场传感器,其体积为255 mm×255 mm×255 mm,质量约10 kg。通过安装定向器测量其倾角和方位角,并进行磁场数据校正,实现其在任何姿态下的测量数据有效;通过安装防水外罩实现其在浅水区有效工作。野外实验表明:该三分量磁场传感器既可布置在地面上,又可布置在浅水区开展AMT工作,可极大地提高野外施工效率,具有广阔的应用前景。The induction magnetic field sensor is widely used in geophysical electromagnetic apparatus. Because of the physical principle, the noise level of the magnetic field sensor is proportional to its length and volume, the length is usually 800~1 400 mm, and the mass is 3~6 kg. In this study, a compact and flux concentrator was developed. The length is less than 240 mm, the diameter is 110 mm, and the mass is 3 kg. Its length is approx. 30% of traditional AMT magnetic field sensors, the frequency band is from 0.1 Hz to 10 kHz, and the equivalent magnetic field noise level is 0.8 pT√Hz at 1Hz. The three magnetic field sensors with the same parameters are mounted vertically to each other on a substrate to form a three-component inductive magnetic field sensor, its volume is 255 mm×255 mm×255 mm, and the mass is 10 kg. The inclination and azimuth angle are measured by installing the directional device, and the magnetic field data correction is carried out to realize the validity of the measurement data under any attitude. Effective operation is carried out in shallow water by installing a waterproof hood. Field experiments show that the three-component magnetic field sensor can be arranged on the ground, and can be arranged in the shallow water to carry out AMT work, which greatly improves the field construction efficiency and has a broad application prospects.

关 键 词：三分量 感应式磁场传感器 磁通聚集 姿态测量 数据校正 

分 类 号：P631[天文地球—地质矿产勘探]