宽温域磁致伸缩位移传感器输出电压模型及特性分析  

Output Voltage Model and Characteristic Analysis of Magnetostrictive Displacement Sensor for Wide Operating Temperature

作　　者：李海毅 李明明[1,2] 刘亚南 翁玲[1,2] 黄文美[1,2] Li Haiyi;Li Mingming;Liu Yanan;Weng Ling;Huang Wenmei(State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology,Tianjin 300130 China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology,Tianjin 300130 China)

机构地区：[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

出　　处：《电工技术学报》2023年第20期5343-5353,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51777053,51801053,52077052);中央引导地方科技发展资金(226Z1704G);河北省自然科学基金(E2019202315,E2022202067)资助项目。

摘　　要：磁致伸缩位移传感器应用于高温环境时,磁致伸缩材料存在随温度升高而力磁性能下降的固有属性,因此迫切需要研究宽温域下传感器的输出特性。基于玻耳兹曼统计量、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0.8 mm的(Fe_(83)Ga_(17))_(99.4)B_(0.6)和Fe_(82)Ga_(13.5)Al_(4.5)波导丝,实验验证了模型的准确性。确定变温下传感器的最佳激励参数,(Fe83Ga17)99.4B_(0.6)偏置磁场21.3 kA/m,脉冲电流24.6 A;Fe_(82)Ga_(13.5)Al_(4.5)偏置磁场16.7 kA/m,脉冲电流18.8 A。在20~350℃用最佳激励参数测得(Fe_(83)Ga_(17))_(99.4)B_(0.6)输出电压最高为577.63 mV,Fe_(82)Ga_(13.5)Al_(4.5)输出电压最高为419.56 mV。采用输出幅值高的(Fe_(83)Ga_(17))_(99.4)B_(0.6)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进行测试,20℃时输出电压最高为595.32 mV,500℃时仍有254.67 mV,非线性误差为±1.3 mm。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 technological development of energy,electric power,aerospace,and other fields,displacement sensors that can work stably at high temperatures have become urgent.However,when the working environment temperature is higher than theindoortemperature,magnetostrictive displacement sensors will face 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 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,Fe_(82)Ga_(13.5)Al_(4.5) and(Fe_(83)Ga_(17))_(99.4)B_(0.6) magnetostrictive wireswere successfully prepared,and all of their Curie temperatures are above 500,which could increase the℃upperworking temperature limit 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 the Debye model.The theoretical model shows that with the increase in temperature,the magnetization and Young's modulus of magnetostrictive material decrease.Meanwhile,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 setupby(Fe_(83)Ga_(17))_(99.4)B_(0.6) and Fe_(82)Ga_(13.5)Al_(4.5) 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(1)(Fe_(83)

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 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]