Wirbelstromsonde

DE 102008027525 A1 UPAB: 20100107 NOVELTY - The probe has an excitation coil (1) for generating a magnetic field at a location of an object (O) to be measured, where the excitation coil is connected to a voltage source. A voltage signal induced in a measuring coil (2) is tapped. A coil body (K) carries the excitation coil and the measuring coil. The excitation coil and the measuring coil include a common electrical ground connection. The coil body is designed as a flat hollow cylinder, where the excitation coil and the measuring coil are arranged inside the cylinder in a common plane (E) perpendicular to a cylinder symmetry axis (Z). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for testing eddy-current with an eddy-current probe. USE - Eddy-current probe for testing such as crack testing, of a material property of a to-be-measured object, and for layer thickness measurement at the object (all claimed). ADVANTAGE - The coil body carries the excitation coil and the measuring coil, where the excitation coil and the measuring coil include the common electrical ground connection, thus providing an improved eddy-current probe with respect to stray capacitance characteristics, and hence achieving precise measurements of the object in the frequency range of above 25 mega hertz