Theoretical and experimental study on magnetic-fluid-based flow sensors  

作　　者：HAO RuiCan LI DeCai 

机构地区：[1]School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China

出　　处：《Chinese Science Bulletin》2011年第17期1844-1847,共4页

基　　金：supported by the National Natural Science Foundation of China (60471004);the Beijing Natural Science Foundation (4062028)

摘　　要：The dependence of flow volume on the pressure difference between the ports of a U-tube was determined for both laminar and turbulent flows of a magnetic fluid.The results showed that the dependence was linear in the case of laminar flow but was non-linear in the case of turbulent flow.In addition,the inductance and the voltage difference across two coils around the arms of the U-tube were calculated.The voltage difference was proportional to the flow volume and inversely proportional to the square of the coil length.These theoretical and experimental results demonstrate that the design of magnetic-fluid-based flow sensors is feasible.The dependence of flow volume on the pressure difference between the ports of a U-tube was determined for both laminar and turbulent flows of a magnetic fluid. The results showed that the dependence was linear in the case of laminar flow but was non-linear in the case of turbulent flow. In addition, the inductance and the voltage difference across two coils around the arms of the U-tube were calculated. The voltage difference was proportional to the flow volume and inversely proportional to the square of the coil length. These theoretical and experimental results demonstrate that the design of magnetic-fluid-based flow sensors is feasible.

关 键 词：流量传感器 磁流体 实验 线圈长度 U型管 非线性 电压差 压力差 

分 类 号：TP212.13[自动化与计算机技术—检测技术与自动化装置]