基于磁化-涡流效应的磁性液体倾角传感器研究  

Study on the magnetic fluid inclination sensor based on magnetization-eddy current effect

作　　者：喻峻 李德才[2] 王德义 何新智[2] Yu Jun;Li Decai;Wang Deyi;He Xinzhi(Institute of Systems Engineering and Equipment,Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341119,China;School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]中国科学院赣江创新研究院系统工程与装备研究所,赣州341119 [2]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《仪器仪表学报》2024年第12期55-62,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(52105286)项目资助。

摘　　要：永磁体在磁性液体中的稳定悬浮在倾角传感器中有着广泛的应用。提出一种利用圆环永磁体、软磁金属和非磁性金属构成惯性质量的磁性液体倾角传感器,利用磁性液体悬浮力作为惯性质量的回复力,通过复合软磁金属的磁化效应和非磁性金属的涡流效应来增加倾角传感器的灵敏度,利用软磁和非磁性金属组成外壳包裹永磁体防止剧烈冲击下的损坏。推导了数学公式用于计算磁性液体悬浮力;研究了惯性质量的轴向长度对悬浮力和线圈电感的影响,论证了信号源对传感器输出电压的影响规律。将磁性液体倾角传感器用于倾角的测量,当倾角的范围为0°~42°时,输出电压和倾角之间的线性度约为6.5%,灵敏度为5 mV/°,迟滞不超过1%。The stable levitation of permanent magnets in magnetic fluid has a wide range of applications in tilt sensors.In this article,a magnetic fluid inclination sensor using ring permanent magnets,soft magnetic metals,and non-magnetic metals as inertial mass is proposed.The magnetic fluid levitation force received by the inertial mass is used as restoring force.The magnetization effect of soft magnetic metals and the eddy current effect of non-magnetic metals are used together to increase the sensitivity of the inclination sensor.The soft magnetic and non-magnetic metals are used to wrap the permanent magnet to prevent damage under severe impact.The calculation formula is derived to calculate magnetic fluid levitation force,the influence of the axial length of inertial mass on the levitation force and coil inductance has been studied,and the effect of signal source frequency on the output voltage of the sensor is demonstrated.The magnetic fluid inclination sensor is used for the measurement of inclination.When the range of inclination angle is 0~42°,the linearity between the output voltage and the inclination angle is about 6.5%,the sensitivity is 5 mV/°,and the hysteresis is less than 1%.The stable levitation of permanent magnets in magnetic fluid has a wide range of applications in tilt sensors.In this paper,a magnetic fluid inclination sensor using ring permanent magnets,soft magnetic metals and non-magnetic metals as inertial mass is proposed,the magnetic fluid levitation force received by the inertial mass is used as restoring force,the magnetization effect of soft magnetic metals and the eddy current effect of non-magnetic metals are used together to increase the sensitivity of the inclination sensor,and soft magnetic and non-magnetic metals is used to wrap the permanent magnet to prevent damage under severe impact.The calculation formula is derived to calculate magnetic fluid levitation force,the influence of the axial length of inertial mass on the levitation force and coil inductance has been studied,and the

关 键 词：磁性液体 倾角传感器 磁悬浮 涡流效应 磁化效应 

分 类 号：TH113.2[机械工程—机械设计及理论]