作　　者： ; ; ;

机构地区： 华南理工大学机械与汽车工程学院

出　　处： 《应用基础与工程科学学报》 2009年第6期910-916,共7页

摘　　要： 提出在传统悬臂梁传感器结构中引入纳米功能材料磁流体,基于磁流体的磁粘可控特性,实现悬臂梁传感器的输出可控性.重点为建立其传感数学模型并进行运动分析,求得动态函数表达式,借助仿真数值方法得到传感模型中的幅值比与阻尼比、频率比的关系曲线,并对传感器可控性进行分析.结果表明,通过改变磁流体的粘度可实现传感器的输出可控性,最终实现宽量程传感测量,研究得出采用二脂基磁流体,选取激励电流为1.2A时磁流体传感量程可放大超过10倍. The magnetic fluid was firstly introduced into the traditional cantilever-beam sensors.The controllable output of the cantilever-beam sensors could be realized on the basis of the novel controllable mag-viscosity of magnetic fluid.The mathematic model of the sensor was established and analyzed,the dynamic control function and the following emulational results,which included the two curves of the amplitude ratio function with the different damping ratio and frequency ratio,were calculated through the mathematic model.The results showed that it was valid to realize the controllable output of the sensors through controlling the viscosity of the magnetic fluid,so that the expanded measurement range could be realized finally.Using double-lipids magnetic fluid and 1.2 A controlling electric current,the measurement range of the sensor could be 10 times larger than before.

关 键 词： 传感器 磁流体 磁粘特性 输出可控性

领　　域： [机械工程] [机械工程]