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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Sensitivity of metal detectors to spheroidal targets
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Sensitivity of metal detectors to spheroidal targets

机译:金属探测器对球形目标的灵敏度

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摘要

The sensitivity of magnetic metal detectors to prolate or oblate spheroidal targets depends both on the semiaxis ratio and on the orientation of the spheroid polar axis relative to the local magnetic field. A spherical target produces null response only if the generator and detector coil magnetic fields are orthogonal, but the spheroid possesses a null direction for a large range of magnetic field orientations. A spheroid can therefore be made undetectable by rotating it into a particular orientation. The existence of such blind-position angles is investigated theoretically in detail and families of curves are given to illustrate them in a particular case.
机译:磁性金属探测器对扁长或扁长球形目标的灵敏度既取决于半轴比率,也取决于球形极轴相对于局部磁场的方向。仅当发生器线圈磁场和检测器线圈磁场正交时,球形目标才会产生零响应,但对于大范围的磁场方向,球体都具有零方向。因此,可以通过将球体旋转到特定方向来使其无法检测。从理论上详细研究了这种盲位角的存在,并给出了曲线族来说明它们在特定情况下的情况。

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