Method and apparatus of using magnetic material with residual magnetization in transient electromagnetic measurement

  • US 20050189945A1
  • Filed: 01/18/2005
  • Published: 09/01/2005
  • Est. Priority Date: 02/09/2004
  • Status: Active Grant
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. An electromagnetic transient transmitter to generate a magnetic field in materials to be analyzed, comprising:

  • a magnetic core made of a permeable magnetic material having magnetic hysteresis, said core magnetically coupled with the materials to be analyzed;

    at least one coil to change magnetization in the magnetic core; and

    a source of current driving the coil, said source of current is switched between zero and at least one non-zero steady current in the coil, said magnetic core remaining substantially magnetized when the source of current is switched to zero current.

View all claims

    Thank you for your feedback