中文摘要：

磁流体是具有磁性和流动性的新型功能材料,以其独特的性能在传感器领域具有巨大的应用潜力。本文综述了利用磁流体的多种特殊性质实现体积、流速、角度、温度、电流和磁场等物理量传感的研究进展,并分析各类磁流体传感器的工作原理。基于几何光学理论,推导和模拟了两套利用磁流体可调谐折射率的磁场传感系统。

英文摘要：

The magnetic fluid is a novel kind of functional materials, with both magnetism and fluidity. It has numerous potential applications to sensors due to its unique features. This paper briefly reviews the progress of applications of magnetic fluids to sensors related to the volume, the flow rate, the angle, the temperature, the current and the magnetic field. Their sensing principles are analyzed. Based on the theory of the geometrical optics and the magnetically tunable refractive index of the magnetic fluid, theoretical derivations and numerical simulations of two kinds of magnetic field sensing systems are conduced, to promote sensor researches and applications based on the magnetic fluid.