Magnetic permeability measurement method for particle materials

Permeability measurement is mainly used to determine the permeability of magnetic material, which is generally required to be shaped prior to test. In many chemical processes, the distribution and density of particle materials play a key role in determining the reaction efficiency. However, particles do not induce as much eddy current as the thin film/ discshaped planar material does. Therefore, it is not convenient to employ the aforementioned method to perform permeability measurement. In this paper, a method for measuring the equivalent permeability of particle mixtures is proposed. The measurement system consists of a four-tap solenoid coil sensor and a LCR meter. Whats more, the relationship between the measured inductance and the permeability of particles is defined. The proposed method is verified numerically by using Comsol Multiphysics software and by experiments. Experimental results show that the relative error of the developed system is below 5.35%.