摘要
磁性液体是一种兼具流动性和磁响应特性的新型功能材料,在密封、传感器、阻尼减振等工程领域有着广泛的应用。提出了一种新型磁性液体惯性传感器,可用于测量物体的倾角或加速度。该传感器利用壳体内腔的圆锥角结构来提供所需的回复力。理论分析得出影响传感器回复力的因素包括磁性液体的体积和饱和磁化强度、圆锥角的大小以及永磁体所产生的磁场强度。实验证明磁性液体体积不同不仅会影响回复力的大小,还会影响传感器的线性度、灵敏度等性能指标,且存在一个最优值。此外,通过在惯性质量圆柱永磁体中加入铁芯的方法可有效提高传感器的灵敏度。
Magnetic fluid is a new kind of functional materials with the fluidity and the response of magnetic field.Applications of magnetic fluid involve various engineering fields such as seal,sensors and dampers.A novel magnetic fluid inertial sensor which can be used as detecting tilt angle or acceleration of an object is presented.The restoring force of the inertial sensor is created by the cone angle inside the housing.The restoring force is studied through the theoretical analysis,which was affected by a few of factors including the volume and magnetization intensity of magnetic fluid,the cone angle and the intensity of the magnetic field created by permanent magnet.Experiment results show that the different volume of magnetic fluid has an influence on not only the restoring force,but also the linearity and sensitivity of the sensor,and there is an optimal value.Besides,sensitivity of the sensor is increased by adding the iron core into the permanent magnet.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2015年第3期507-514,共8页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(51375039)
北京市自然基金(4142046)
教育部创新团队发展计划(IRT13046)
中央高校基本科研业务费专项资金(2013YJS074)资助项目
关键词
磁性液体
惯性传感器
浮力原理
回复力
magnetic fluid
inertial sensor
levitation principle
restoring force
