磁控形状记忆合金振动传感器模型及实验特性  

Model and experiment characteristic on vibration sensor of magnetically controlled shape memory alloy

作　　者：鲁军[1] 杨宽[1] 王凤翔[2] 

机构地区：[1]沈阳理工大学信息科学与工程学院,辽宁沈阳110159 [2]沈阳工业大学电气工程学院,辽宁沈阳110870

出　　处：《电机与控制学报》2014年第3期20-24,共5页Electric Machines and Control

基　　金：国家自然科学基金(51377110);辽宁省自然科学基金(201102184);沈阳市科技计划项目(F12-277-1-28)

摘　　要：磁控形状记忆合金(magnetically controlled shape memory alloy,MSMA)在机械外力作用下,磁路中的磁通密度会发生变化,利用该特性可以制作将机械能转换为电能的振动传感器。分析了MSMA传感器的工作原理,基于MSMA材料的逆特性设计并研制了MSMA振动传感器样机,传感器输出的感应电压峰-峰值随输入信号频率的增加而增加。在材料应力-应变关系和样机磁路模型基础上,推导出MSMA感应电压表达式;计算不同频率时的传感器感应电压,计算结果和实验结果相吻合。研究表明传感器感应电压模型的正确性和MSMA振动传感器应用的可行性。The magnetic flux density of magnetically controlled shape memory alloy （MSMA） varies under the action of mechanical force, and a vibration sensor, which converts mechanical energy to electrical energy, was designed with the help of this reverse characteristic. The operation principle of MSMA sensor is analyzed, MSMA vibration sensor prototype was designed and built based on MSMA reverse characteris- tics, the peak-peak value of the induced voltage increases with the input signal frequency. On the basis of MSMA stress-strain relationship and magnetic circuit model of prototype, the induced voltage expression was derived; the induced voltage of the sensor was calculated under the different frequency. It is found that the calculating results are in a good agreement with the experimental ones. Studies show the correctness of induced voltage model and the feasibility of MSMA vibration sensor application.

关 键 词：磁控形状记忆合金 振动传感器 逆特性 模型 感应电压 

分 类 号：TM359[电气工程—电机]