中文摘要：

针对目前国产MDS因采用Fe-Ni波导丝而导致量程过小的问题,提出将Fe83Ga17波导丝应用于MDS的新方案,并从电磁特性的角度对其进行了论证。首先,在分析MDS原理的基础上结合傅里叶分析和电磁学理论建立了MDS波导丝的磁场模型,为电磁特性的研究奠定了数学基础;其次,在数学理论的基础上借助MATLAB分析了波导丝的磁场分布特性,得出了其有利于增强MDS威德曼效应效果的结论;最终,通过分析MDS在不同量程处的回波信号效果,验证了方案的可行性。

英文摘要：

The range of magnetostrictive displacement sensors （MDS） is directly determined by the electromagnetic properties of the magnetostrictive line （ML）. The small measuring range of domestic MDS is caused by the ML of Fe-Ni. In accordance with the problem, applying the ML of Fe83 Gait to MDS is proposed and the possibility is demonstrated from the point of electromagnetic properties. A magnetic field model based on the fourier analysis and electromagnetic theory is firstly built,which lays a foundation for the research on electromagnetic properties. And then,the distribution of the magnetic field simulated by MATLAB helpful for wiedemann effect is obtained. The feasibility of our scheme is demonstrated by the good effect of echo signal finally.