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FeGa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13.4 d B提高至25.2 d B,检测电压幅值由52 m V提高至80 m V,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。
The structure of a Fe-Ga magnetostrictive displacement sensor must be appropriately designed to reduce the impact of driving pulse current and remanence on the detecting signal of a magnetostrictive displacement sensor and further improve its measurement accuracy.Accordingly,this study proposes a magnetostrictive displacement sensor adopting a moving coil.In the design,the permanent magnet is fixed on the head of a waveguide wire,and the position coil can move on the waveguide wire to change the displacement.The prototype of the novel magnetostrictive displacement sensor based on a galfenol wire is manufactured.The experimental results show that compared with that of the traditional structure,the signal-to-noise ratio of the detecting signal clearly increased from13.4dB to25.2dB;the maximum amplitude of the detecting voltage increased from53mv to80mv;and the new structure could achieve the echo rate correction.The moving coil type of the magnetostrictive displacement sensor can effectively improve the linearity,repeatability,and hysteresis of the sensor.
作者
王博文
谢新良
张露予
李佳泽
WANG Bowen;XIE Xinliang;ZHANG Luyu;LI Jiaze(Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2018年第3期534-540,共7页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51171057
51201055)
关键词
驱动脉冲电流
磁致伸缩
位移传感器
结构
剩磁
信噪比
回波速度
迟滞性
driving pulse current
magnetostrictive
displacement sensor
structure
remanence
signal-to-noise ratio
echo rate
hysteresis
