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Susceptometers for foreign body detection

  • US 20020151779A1
  • Filed: 12/18/2001
  • Published: 10/17/2002
  • Est. Priority Date: 06/25/1996
  • Status: Active Grant
First Claim
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1. A source-sensor unit for a magnetic susceptibility measuring instrument, comprising:

  • at least one applied-field generating element; and

    at least one magnetic sensor;

    wherein said at least one applied-field generating element and said at least one magnetic sensor are arranged such that the signal due to the applied field is canceled out; and

    wherein said entire source-sensor unit is constructed in such a way that said cancellation of the applied-field signal is preserved as the entire source-sensor unit expands and contracts uniformly.

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