随着基于磁性液体的各类传感器研究的深入，磁性液体粘度对传感器动态特性的影响越来越被重视，粘度随外界因素的变化规律成为热点。对磁性液体的磁粘特性和粘度的其它影响因素进行了研究，利用亥姆霍兹线圈原理，制作了产生均匀可调磁场的装置，外加在旋转粘度计外，得到一定磁场下磁性液体粘度的变化规律；并利用锥板粘度计对磁性液体粘度随温度、转速等其它因素的变化进行了分析。结果表明，磁性液体粘度随外加磁场的增大而增大，且与磁场方向和磁性液体涡旋矢量方向的夹角有关；粘度随温度的增大呈下降趋势；具有剪切变稀的非牛顿流变特性。这些结果对传感器动态特性的研究具有重要意义。
With the development of research about sensors based on magnetic fluid,the effect which was pro-duced by the viscosity of magnetic liquid on dynamic characteristics of sensor was paid more attention.The changing of viscosity with the external factors become the hot spot.This paper studied magnetoviscous charac-teristic of magnetic liquid and other affecting factors to influence its viscosity.And the device was designed based on principle of Helmholtz coils,which could produce adjustable uniform magnetic field.The coils are placed outside the rotational viscometer,measured viscosity change of magnetic fluid under a certain magnetic field.And using the vertebral plate viscometer,the viscosity changes with temperature and shearing rate was studied.The results show that the viscosity of magnetic fluid will increases with an increase of magnetic field, and be affected by the angle between the direction of magnetic field and scroll vector of magnetic fluid.The vis-cosity decreases with the increasing of temperature.The liquid was non-newtonian flow,the apparent viscosity of which reduces with increasing of shearing rate.These results are beneficial to the dynamic characteristics re-search on sensors.
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