|本期目录/Table of Contents|

 基于无阻尼扭转波干涉的磁致伸缩位移传感器(PDF)

《纳米技术与精密工程》[ISSN:1672-6030/CN:12-1351/O3]

期数:
2017年5期
页码:
347-352
栏目:
精密测量
出版日期:
2017-09-15

文章信息/Info

Title:
 Magnetostrictive Displacement Sensor Based on Undamped
Torsional Waves Interference
作者:
 王博文 谢新良 张露予 崔晓静
河北工业大学电磁场与电器可靠性省部共建重点实验室, 天津 300130
Author(s):
 Wang Bowen Xie Xinliang Zhang Luyu Cui Xiaojing
Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability,
Hebei University of Technology, Tianjin 300130, China
关键词:
 磁致伸缩 位移传感器 无阻尼 干涉 双侧阈值
Keywords:
 magnetostriction displacement sensor undamped interference bilateral threshold
分类号:
TP212.12
DOI:
10.13494/j.npe.20160059
文献标识码:
A
摘要:
 为增大检测信号的输出幅值和降低反射波对测量精度的影响,在传统磁致伸缩位移传感器结构基础上,提出一种基于无阻尼扭转波干涉的位移测量方法.制作了Fe-Ga磁致伸缩位移传感器样机,检测线圈输出的电压幅值由42 mV提高到65 mV,信噪比由11.6 dB提高到22.5 dB,位移分辨力提高1倍.对扭转波的两种时间定位方法进行分析,提出了一种动态双侧阈值法的时间定位方法,给出了此方法使用的范围及阈值选取的方法,推导了此方法所能提高的测量精度,并通过实验证明了此方法的测量精度约提高了1倍.
Abstract:
 To increase the output amplitude of detecting signal and to reduce the influence of reflection wave on measurement accuracy, a displacement measurement method based on undamped torsional wave interference is proposed. The Fe-Ga magnetostrictive displacement sensor (MDS) is manufactured. The output voltage amplitude of the detecting coil is increased from 42 mV to 65 mV, the signal to noise ratio (SNR) is improved from 11.6 dB to 22.5 dB, and the displacement resolution is enhanced by 1 time. Based on the analysis of two time positioning methods for torsional wave, a time positioning method of dynamic double bilateral threshold is proposed. The using range and selecting threshold of this method are given. The measurement accuracy the proposed method improves is derived. Experimental results show that the measurement accuracy of this method is doubled.

参考文献/References

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备注/Memo

备注/Memo:
收稿日期: 2016-10-12.
基金项目: 国家自然科学基金资助项目(51171057).
作者简介: 王博文(1956—),男,博士,教授.
通讯作者: 谢新良,xiexinliang1993@163.com.
更新日期/Last Update: 2017-09-20