[發明專利]一種基于磁梯度不變量的磁梯度計校正方法

在審

• 申請號: 201710194751.5
• 申請日: 2017-03-29
• 公開（公告）號: CN106997035A
• 公開（公告）日: 2017-08-01
• 發明（設計）人: 隨陽軼;劉世斌;周志堅;王言章;程德福
• 申請（專利權）人: 吉林大學
• 主分類號: G01R35/00
• 分類號: G01R35/00
• 代理公司: 長春吉大專利代理有限責任公司22201
• 代理人: 王立文

技術領域：

本發明涉及一種地球物理勘探中的磁測儀器的校正，尤其是基于磁梯度不變量的磁梯度計校正方法。

背景技術：

在地球磁場下進行磁場相關的科學研究和生產實踐，已經從早期的磁場總場和磁場矢量測量發展到現在的磁梯度張量測量。磁梯度計是用來測量磁場空間梯度的裝置[Pedersen L B,Rasmussen T M.The gradient tensor of potential field anomalies:Some implications on data collection and data processing of maps.Geophysics,1990,55(12):1558-1566.]。磁梯度張量儀具有以下優點：沒有磁場測量中對環境磁場方向極度敏感的問題[Heath P,Heinson G,Greenhalgh S.Some comments on potential field tensor data.Exploration Geophysics,2003,34(2):57-62.]，具有更高的目標分辨能力和更加豐富的信息[Schmidt P W,Clark D A.The magnetic gradient tensor:Its properties and uses in source characterization.The Leading Edge,2006,25(1):75-78.]。因此被用于地面或水下未爆炸物檢查[Pei Y H,Yeo H G,Kang X Y,et al.Magnetic gradiometer on an AUV for buried object detection,OCEANS 2010.IEEE,2010:1-8.]、移動磁性目標探測[Nara T,Suzuki S,Ando S.A closed-form formula for magnetic dipole localization by measurement of its magnetic field and spatial gradients.IEEE Transactions on Magnetics,2006,42(10):3291-3293.]、航空或地面的礦產探查[Clark D A,Schmidt P W,Coward D A,et al.Remote determination of magnetic properties and improved drill targeting of magnetic anomaly sources by Differential Vector Magnetometry(DVM).Exploration Geophysics,1998,29(3/4):312-319.]，火山活動監測[Bracken R E,Grover T P,Puniwai G S.Development and testing of a tensor magnetic gradiometer system with trial monitoring near the Kilauea Volcano,Hawaii.US Dept.of the Interior,US Geological Survey,1998.]，地磁圖的修正[Schiffler M,Queitsch M,Schneider M,et al.Calculation and Analysis of magnetic gradient tensor components of global magnetic models.AGU Fall Meeting Abstracts.2014,1:03.]，非屏蔽環境中磁納米粒子的檢查[Elrefai A L,Sasada I,Yoshida T.Fluxgate gradiometer for magnetic nanoparticle magnetorelaxometry in unshielded environment,Magnetics Conference(INTERMAG).2015IEEE.IEEE,2015:1-1.]，消除探測引力波的飛船的磁干擾[Griffin D K,Masseglia O,Hall M,et al.Design and calibration of a compact low-noise magnetic gradiometer.Aerospace EMC,2012Proceedings ESA Workshop on.IEEE,2012:1-6.]，磁環境評估[Voigt J,Knappe-Grüneberg S,Gutkelch D,et al.Development of a vector-tensor system to measure the absolute magnetic flux density and its gradient in magnetically shielded rooms.Review of Scientific Instruments,2015,86(5):055109.]等。