电工技术学报
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宽温域磁致伸缩位移传感器输出电压模型及特性分析
李海毅1,2, 李明明1,2, 刘亚南1,2, 翁玲1,2, 黄文美1,2
1.省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学)天津 300130;
2.河北工业大学河北省电磁场与电器可靠性重点实验室天津 300130
Output Voltage Model and Characteristic Analysis of Magnetostrictive Displacement Sensor For Wide Operating Temperature
Li Haiyi1,2, Li Mingming1,2, Liu Yanan1,2, Weng Ling1,2, Huang Wenmei1,2
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China;
2. KeyLaboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology Tianjin 300130 China
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摘要 磁致伸缩位移传感器有潜力应用于高温环境下,但磁致伸缩材料存在随温度升高力磁性能下降的固有属性,迫切需要研究宽温域下传感器输出特性。基于玻尔兹曼统计量、磁弹性耦合效应和德拜模型,建立了非等温条件下传感器输出电压模型。搭建提供可调脉冲电流和轴向偏置磁场的变温平台,选用直径0.8mm的(Fe83Ga17)99.4B0.6和Fe82Ga13.5Al4.5波导丝,实验验证模型的准确性。确定变温下传感器的最佳激励参数,(Fe83Ga17)99.4B0.6偏置磁场21.3kA/m,脉冲电流24.6A;Fe82Ga13.5Al4.5偏置磁场16.7kA/m,脉冲电流18.8A。在20~350℃用最佳激励参数测得(Fe83Ga17)99.4B0.6输出电压最高为577.63mV,Fe82Ga13.5Al4.5输出电压最高为419.56mV。采用输出幅值高的(Fe83Ga17)99.4B0.6波导丝根据其最佳激励参数设计了硬件电路和移动位置磁铁结构,制作宽温域传感器样机并在高温平台上测试,20℃时输出电压最高为595.32mV,500℃时仍有254.67mV,非线性误差为±1.3mm。
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李海毅
李明明
刘亚南
翁玲
黄文美
关键词 磁致伸缩位移传感器Fe-Ga 波导丝宽温域输出电压模型    
Abstract:Magnetostrictive displacement sensor uses the Wiedemann effect of magnetostrictive wire or strip to realize absolute displacement measurement, which has the advantages of high measurement accuracy, strong anti-interference ability, and long service life.With the development of energy, electric power, aerospace, and other fields, there is an urgent need for displacement sensors that can work stably at high temperatures. However, when the working environment temperature of magnetostrictive displacement sensors is higher than room temperature, there are problems such as weakened output voltage, increased signal attenuation, and decreased measurement accuracy, which limit their high-temperature applications.
To expand the application range of magnetostrictive displacement sensors at high temperatures and variable temperatures, this paper studies the output characteristics of magnetostrictive displacement sensors in wideoperating temperatures by increasing the output voltage of the sensor to eliminate the adverse effects of signal weakening and noise interference caused by temperature rise.In this work, Fe82Ga13.5Al4.5, and (Fe83Ga17)99.4B0.6 magnetostrictive wireswere successfully prepared and all of their Curie temperatures are above 500℃, which could increase the working temperature of sensors. The output voltage model of the sensor under non-isothermal conditions was established based on Boltzmann statistics, the magneto-elastic coupling effect, and Debye model. The theoretical model shows that, with the increase in temperature, the magnetization and Young's modulus of magnetostrictive material decrease, the force-magnetic coupling characteristics change, and the output voltage of the sensor decreases. A temperature-variable platform with adjustable pulse current and axial bias magnetic field was setuptoverifythemodel’saccuracyby (Fe83Ga17)99.4B0.6 and Fe82Ga13.5Al4.5 wires with a diameter of 0.8mm. The optimal parameters of excitation pulse current and bias magnetic field of the two kinds of wires are (i) (Fe83Ga17)99.4B0.6 at 21.3kA/m and 24.6A; (ii) Fe82Ga13.5Al4.5 at 16.7kA/m and 18.8A. At 20~350℃, the maximum output voltage of (Fe83Ga17)99.4B0.6 is 577.63mV, and the maximum output voltage of Fe82Ga13.5Al4.5 is 419.56mV. The results show that the maximum output amplitude can be obtained when the excitation magnetic field is equal to the bias magnetic field at different temperatures. According to the optimal excitation parameters of (Fe83Ga17)99.4B0.6 waveguide wire, the hardware circuit and the structure of the moving position magnet are designed. A wideoperatingtemperatureprototype was made and tested on a high-temperature platform.At 20℃, the maximum output voltage was 595.32mV, and the SNR was 13.74dB. At 500℃, the output voltage is 254.67mV and the signal-to-noise ratio is 6.11dB. The nonlinearity error of the sensor with increasing temperature is ±1.3mm.
The experimental results show that the magnetostrictive displacement sensor has a wide operating temperature range, good output characteristics, high signal-to-noise ratio, and small measurement error, and can be applied to monitor position information in high temperature and variable temperature environments.The results can provide theoretical guidance for the design optimization of magnetostrictive displacement sensors working in wide operating temperatures.
Key wordsmagnetostriction    displacement sensor    Fe-Ga waveguide wire    wideoperating temperature    output voltage model   
收稿日期: 2022-08-18     
PACS: TP212  
基金资助:国家自然科学基金(51777053,51801053,52077052)、中央引导地方科技发展资金项目(226Z1704G)和河北省自然科学基金(E2019202315,E2022202067)资助
通讯作者: 李明明 男,1986年生,副教授,博士生导师,研究方向为新型磁性材料与器件。E-mail:Limm@hebut.edu.cn   
作者简介: 李海毅 男,1998年生,硕士研究生,研究方向为新型磁性材料与器件。E-mail:hy02192022@163.com
引用本文:   
李海毅, 李明明, 刘亚南, 翁玲, 黄文美. 宽温域磁致伸缩位移传感器输出电压模型及特性分析[J]. 电工技术学报, 0, (): 75-75. Li Haiyi, Li Mingming, Liu Yanan, Weng Ling, Huang Wenmei. Output Voltage Model and Characteristic Analysis of Magnetostrictive Displacement Sensor For Wide Operating Temperature. Transactions of China Electrotechnical Society, 0, (): 75-75.
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