PEYTON, Anthony Joseph,O'TOOLE, Michael Daniel,KARIMIAN, Noushin
申请号：
WO2018GB51173
公开号：
WO2018203055(A1)
申请日:
2018.05.02
申请国别(地区):
世界知识产权组织国际局
年份:
2018
代理人:
摘要：
Embodiments of the present invention provide a method of and an apparatus for determining conductivity of a metal target. An interrogation magnetic field is provided and induces an electrical current in the metal target. A resultant magnetic field is generated by the electrical current. In-phase and out-of-phase components of the resultant magnetic field are determined for the target at a first frequency (conductivity limit due to skin depth) and a second frequency of the interrogation magnetic field respectively. The conductivity of the metal target is determined based on the in-phase and out-of-phase components at the first and second frequencies.
