发明名称 |
METHOD AND APPARATUS FOR DETECTION USING MAGNETIC GRADIENT TENSOR |
摘要 |
Locating and characterising a magnetised body involves moving a magnetic gradient tensor sensor relative to the magnetised body along a profile, or allowing the magnetised body to move along a profile past the sensor. Magnetic gradient tensor measurements are obtained at points along the profile. A rotational invariant calculated from the eigenvalues of the magnetic gradient tensor measurements is then used to locate and/or characterise the body. The rotational invariant can be the scaled moment of a point dipole representation of the magnetised body, or one third of the square root of the scaled moment. The rotational invariant is modelled and sufficient measurements obtained to over-determine parameters of the model. A system of linear equations resulting from a model of the gradient tensor elements is then solved using the determined values of parameters.
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申请公布号 |
US2010211337(A1) |
申请公布日期 |
2010.08.19 |
申请号 |
US20080452117 |
申请日期 |
2008.06.18 |
申请人 |
COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION |
发明人 |
CLARK DAVID ALAN |
分类号 |
G06F19/00;G01R33/02;G01V3/08;G06F17/11 |
主分类号 |
G06F19/00 |
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