| 摘要 |
A method for the mesurement of electrical properties of materials through non-magnetizable materials. The method also to calculate the thickness of a material with unknown permeability and conductivity using transparencies. The method comprising the steps of creating a first set of electromagnetic waves having specific constant amplitude of a known frequency, the first set of electromagnetic waves for engaging a system, impinging the first set of electromagnetic waves on the system under investigation, nulling the system, receiving a nulled signal, creating a change in the system, and receiving a modified signal associated with the change from the nulled signal such that the modified signal contains sufficient information to determine the change in the system. The method further comprising the steps of testing empirically to approximate the conductivity, testing empirically to approximate the permeability, creating a second set of electromagnetic waves adjacent to the system to be measured, the second set of electromagnetic waves being of a relatively low frequency and of lower frequency that the first set of electromagnetic waves, and impinging a portion of the material in the system.
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