Method and apparatus for magnetic field detection
AssigneeCommonwealth Scientific and Industrial Research Organisation
InventorDavid Tilbrook
Life of this patent
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Abstract
A method and device for field detection are provided, in which one or more gradiometers (31, 32, 33) are positioned in the field and rotated about their axes. Rotation of a single gradiometer allows an output signal of the gradiometer to be analysed in the Fourier domain, which allows particular field components to be obtained, and also separates the field signal from noise, in the frequency domain. Use of three such rotating gradiometers with non-parallel axes allows a complete magnetic field gradient tensor to be obtained with data redundancy, and can reduce crosstalk.
Claims46
A method of field detection comprising:
- providing a gradiometer in a field, the gradiometer having at least first and second field vector sensors connected in a differencing arrangement;
- and controllably altering a position of the at least first and second field vector sensors relative to the field during operation of the gradiometer.
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A field detection device comprising:
- a gradiometer, the gradiometer having at least first and second field vector sensors connected in a differencing arrangement;
- and means for controllably altering the position of the at least first and second field vector sensors relative to a field during operation of the gradiometer.
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Dependencies are inferred from the claim text.