MSMA传感器结构优化设计

Optimal Design of MSMA Sensor Structure

基于磁控形状记忆合金(MSMA)的逆效应原理,研制一件以MSMA为核心元件,将机械力转化为电磁信号的传感器。经过对传感器各结构原理与作用的分析,以理论计算作为设计依据,对永磁体的位置、尺寸、线圈匝数等结构参数进行优化,旨在增大气隙磁密、减小励磁功率和提高感应电压。使用有限元分析软件对磁场进行电磁仿真,仿真结果显示气隙磁通密度满足MSMA传感器的要求。试验表明,优化后的传感器气隙磁通密度增大,励磁功率降低,输出的感应电压提高,表明该装置设计合理,性能优异,对实现MSMA传感器应用具有一定的研究意义。

Based on the inverse effect principle of magnetron shape memory alloy(MSMA),a sensor with MSMA as the core element is developed to convert mechanical force into electromagnetic signals.After analyzing the structural principles and functions of the sensor,using theoretical calculations as the design basis,the position and size of the permanent magnet,the number of turns of the coil and other structural parameters are optimized to increase the air gap magnetic density,reduce the excitation power and increase the induced voltage.The finite element analysis software is used to perform electromagnetic simulation of the magnetic field,and the simulation results show that the air gap magnetic flux density meets the requirements of the MSMA sensor.