深海磁日变观测系统研究  

The study on the deep sea magnetic diurnal variation system

作　　者：陆敬安[1] 柴剑勇[2] 徐行[1] 严兴[2] 黄晖[2] 于彦江[1] 黎珠博[2] 

机构地区：[1]广州海洋地质调查局,广东广州510760 [2]广东省地震局,广东广州510075

出　　处：《海洋通报》2010年第4期392-395,共4页Marine Science Bulletin

基　　金："十一五"863课题资助(2006AA09Z345)

摘　　要：深海磁日变观测具有探头姿态难以控制、耐压要求高及记录时间长的特点。本文设计全向性质子探头较好地解决了因探头方向与地磁场方向的夹角较小而引起的旋进信号弱问题,同时借助于耐高压的玻璃仓作为封装载体实现了深水观测目标;采用信号等级分类算法抑制干扰和评价信号质量,提高了系统测量的精度,通过实时检测电路温度及预先温度标定参数实施温度影响校正。研究的深海型日变观测系统具有低压供电、分钟测量记录时间40天以上,工作水深达6000m、分辨率0.01nT以及精度0.2nT,比测接近欧沃豪斯型磁力仪测量效果,实现了相对廉价磁力仪的高精度磁场观测。To make the deep sea diurnal variation observation needs to overcome the trouble of probe orientation, high pressure and long working time. The full orientation of the proton probe designed in this paper well resolve the weak signal due to the probable small angle between the probe and earth magnetic field. And by using of high pressure affordable glass cabin for holding the probe, successfully the aim of deep sea observation is obtained. Signal classification effectively constrains the noise and improves the recording accuracy of the system. The temperature correction is realized with real time temperature measuring calibrated by pre-temperature parameters. The deep sea diurnal variation observation system presented by this paper features with low voltage powered, can last more than 40 days by minutes recording and its affording depth is 6,000 m with resolution 0.01 nT, accuracy 0.2 nT. Its recording effects are much close to the Overhauser magnetometer. Thus relatively high accuracy magnetic observation is achieved by lower price instruments.

关 键 词：磁日变 深海 观测系统 性能分析 技术设计 

分 类 号：P738.3[天文地球—海洋地质] P631.23[天文地球—海洋科学]