磁致伸缩位移传感器Fe57Ni43波导丝的磁电特性研究

摘要

The accuracy and reliability of magnetostrictive displacement sensors (MDS) are both directly determined by the properties of the magnetostrictive line (ML). The magnetic and electrical properties of the ML, which lack of study in literatures, are researched by taking Fe57Ni43 for example. Besides the material characteristics of Fe57Ni43, the ML magnetic field characteristics are studied by a 3-D finite element model established by ANSYS, and the echo electrical signal is analyzed by establishing electronic information system based on DSP. The results achieved in this paper will provide a theoretical basis for the ML to be applied to MDS from the point of magnetic and electrical properties.%磁致伸缩位移传感器(MDS)波导丝的相关特性直接决定了其工程应用的精确性和可靠性。针对目前MDS波导丝的磁电特性鲜有报道，以Fe57Ni43波导丝为例，结合Fe57Ni43的材料特性，一方面利用有限元仿真软件(ANSYS)建立波导丝的有限元模型对其磁场特性进行了研究；另一方面，通过构建基于数字信号处理(DSP)的电子信息系统对波导丝回波电信号特性进行了分析。最终，从磁电特性的角度为Fe57Ni43波导丝应用于磁致伸缩位移传感器提供了理论依据。