巴克豪森励磁检测传感器设计与仿真分析

Design and simulation analysis of excitation detection sensor based on Barkhausen effect

针对铁磁性材料设计了一种基于巴克豪森效应的励磁检测传感器装置。为了验证所设计的励磁检测传感器中励磁装置的可行性,利用有限元电磁场仿真分析软件Ansoft对磁化器部分进行了有限元仿真,并分析了不同激励条件下的试样磁化效果。通过仿真结果可以得出:磁化装置符合设计要求,能够对试件进行有效的励磁;通过不同参数下的仿真结果得到,励磁电流幅值以及频率是影响励磁效果的关键因素,并且对于特定分析点,随着励磁电流的幅值减小以及频率的增加,试件磁感应强度基本呈现减小的变化趋势。

According to the detection principle of Barkhausen effect,an excitation detection sensor device is designed for ferromagnetic material. In order to verify the feasibility of the designed magnetization device,finite element simulation analysis on magnetization device is carried out using Ansoft which is a special finite element simulation software in electromagnetic field,and the effect of magnetization under different excitation conditions is analyzed. It is concluded through simulation results that magnetization device meets the design requirements and the specimen can be effectively excited. And through the simulation results under different parameters,excitation current amplitude and frequency are the key factors that affect the excitation effect. And for the particular point,with the decrease of the amplitude of the excitation current and the increase of the frequency,the magnetic induction intensity of the specimen shows a decreasing trend.