Vorrichtung zum ortsaufgeloesten, zerstoerungsfreien Untersuchen von magnetischen Kenngroessen

An induction sensor (1) with a local resolution in the microstructure range and a Hall probe (14) record the Barkhausen noise curve to be stored in an intermediate memory (40) at every location moved by a positioning device (22) at a distance controlled by a control circuit over the surface of a test unit (30). By allocating the corresponding parameters to the measuring locations to the characteristic parameters of the Barkhausen noise curve filtered by a discriminator (41), the natural voltage and structural condition of the test unit surface is displayed in an output device (45) at a resolution in the microstructure range