Magnetic non-destructive testing with controllable magnetization waveform

摘要

(1) Setup for precise measurement of the magnetic hysteresis and Barkhausen noise with two main features: an accurate local determination of the surface magnetic field and an improved feedback control of the magnetic field/induction waveform. (2) This made the measurements repeatable and independent of a specific design of the magnetic circuit. (3) The technique is an important source of physically accurate data needed for investigation of the magnetization dynamics and for development of the theoretical models.