中文摘要：

磁致伸缩位移传感器是一种测量精度高,测量位移大的新型位移传感器.传感器设计涉及多学科交叉,难以建立统一数学模型.以FeGa材料作为磁致伸缩位移传感器的核心波导丝,建立了波导丝材料磁致伸缩弹性波振动模型,波导丝磁机耦合模型和信号检测模型;同时分析了弹性波信号的受限因素,信号衰减特性.在数学模型基础上,搭建磁致伸缩位移传感器系统,设计了扭转波信号检测电路.实验结果表明信号的输出随着传感距离的增加而减小,该模型对大位移磁致伸缩传感器研究有积极意义.

英文摘要：

Magnetostrictive displacement sensor is a new displacement sensor which is high accuracy and long- range. It is difficult to find a unified mathematical model because of integration of cross-curricular interests. Magnetostrictive elastic wave vibration model, magnetic machine coupling model and signal detection model are found based on using FeGa material as elastic waveguide of system. Meanwhile main limited factors and signal attenuation characteristics areanalyzed and discussed. Magnetostrictive displacement sensor system is built and a detecting signal circuit is designed under the mathematic model configuration. The experimental results verify that the output of the sensor signal is inversely proportional to the length of waveguide, which has a positive effect on studying the long- range magnetostrictive displacement sensor.