摘要:为减小剩磁和驱动脉冲电流对磁致伸缩位移传感器检测信号的影响,进而提高传感器的测量精度,对Fe-Ga磁致伸缩位移传感器的结构进行设计,提出了一种移动线圈式结构的磁致伸缩位移传感器,此时永磁体固定在波导丝头部,位置线圈在波导丝上移动起到位移改变的作用。制作了新结构的传感器样机,实验结果表明:与传统结构相比,结构改进后检测信号的信噪比由13.4dB提高至25.2dB,检测电压幅值由52mV提高至80mV,且能实现回波速度校正。移动线圈式磁致伸缩位移传感器能有效改善传感器的线性度、重复性和迟滞性。
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