| 摘要 |
With a method for the contactless determination of a thickness of a layer ( 20 ) made of electrically-conductive material of a component ( 17 ), a sensor composed of a coil form ( 13 ) and a coil ( 14 ) is positioned in the vicinity of the component ( 17 ) to be measured. The method is based on a combination of the principles of induction and eddy current. The thickness of the layer ( 20 ) is determined using a plurality of measuring and evaluation steps in which the coil ( 14 ) is acted upon with a first alternating current frequency f 1 and a second alternating current frequency f 2 , and its change in inductance is evaluated. The distance between the coil form ( 13 ) and, therefore, the coil ( 14 ), and the component ( 17 ) is derived from the inductance value of the coil ( 14 ) acted upon with the second alternating current frequency f 2.
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