Fe83Gal7磁致伸缩位移传感器激励信号的ANSYS分析及DSP实现

摘要

By means of ANSYS and DSP,feasibility and realization of excitation signal of Fe83Ga17 magnetostrictive displacement sensor were discussed. Excitation signal included two interconnected parts,one is the impulse signal,and the other is magnetic field. So far as magnetic field,the sensor line was made from Fe83Ga17 magnetostrictive material rather than FeNi. Utilizing ANSYS, it can come to a conclusion that magnetic field concentrates on the sensor line, which creates a condition for the generation of ideal elastic waves. Impulse signal also plays an important role in generation of elastic waves,so it is necessary for analysising excitation signal parameter and its DSP realization after discussing the lack of single chip and the advantages of DSP in accuracy and stability of the sensor.%借助ANSYS和DSP,讨论了Fe83 Ga17磁致伸缩位移传感器激励信号部分的可行性及其实现.激励信号主要包括电脉冲信号和磁场信号两个部分.在磁场信号方面,传感器波导丝采用了一种区别于FeNi材料的新型Fe83 Ga17磁致伸缩材料；通过ANSYS仿真结果得到了激励磁场主要集中于波导丝内,为理想弹性波的形成创造了条件的结论.激励电脉冲信号决定着激励磁场的产生,在脉冲信号方面,讨论了传统单片机方案的局限性和DSP的应用在提高传感器精度和稳定性方面的优势,并给出了激励信号的参数分析及其DSP具体实现.