摘要
磁悬浮组件作为惯性质量块,应用磁悬浮原理实现振动测量。对系统进行磁力分析和涡流分析,得到传感器系统的刚度和阻尼的表达式。通过分析传感系统的运动特性,推导出系统的二阶运动方程,得出传感系统的幅频特性。使用ANSYS数值模拟磁悬浮系统,可以得到系统各部分的磁感应强度以及系统的刚度值。仿真结果表明,偏移距离小于4mm时,刚度值基本恒定不变,同时验证理论分析的正确性。通过标准激振器标定和管道冲击信号测试,验证该传感器系统的可行性。实验结果得出传感器的灵敏度为213V·s/m。
The magnetic-suspending component as a mass block constitutes inertia vibration sensing system based on magnetic levitation theory. By analyzing magnetic force and eddy current of vibration sensing system, formulas of stiffness and damping are derived. By analyzing the movement characteristics of sensing system, the second-order movement equations is derived, and resultantly its frequency dependence of amplitude obtained. Simulation is carried on magnetic suspending system applying ANSYS, and the system stiffness and magnetic induction is calculated. The simulation results show that, when offset distance is less than 4 mm, stiffness value is basically constant, and correctness of theoretical result is verified by analysis of ANSYS calculation. Calibration of a standard vibration exciter and test of pipe impact signals verifys the feasibility of the sensor system. The test results show a sensitivity of 213V·s·m-1.
出处
《磁性材料及器件》
北大核心
2014年第2期28-31,共4页
Journal of Magnetic Materials and Devices
基金
国家自然科学基金资助项目(61227003)
国家973计划资助项目(2011CB311804)
关键词
惯性振动传感器
磁悬浮
原理
设计
inertial vibration sensor
magnetic-suspending
theory
design
