The principle of magnetic hysteresis loop measurement of hard magnetic material based on AT89C51 is introduced in this paper, including the implementation of the hardware and software.

This paper briefly introduces the measuring principle of hysteresis loop, puts forward the new method based on SOC for measurement of hysteresis loop and the scheme of realizing it.

The hysteresis loss characteristics of the ferrite material used in deflection yoke rings were studied. The principle and method of hysteresis loop measurement have been introduced.