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Design of current sensor using a magnetorheological fluid in shear mode

机译：在剪切模式下使用磁流变流体的电流传感器设计

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A new approach to measure the direct current (dc) using magnetorheological (MR) fluids with a resonance concept is proposed in this work. The current measurement system is designed using a piezolaminated cantilever beam coupled with an electromagnetic coil-based MR fluid shearing set-up. The cantilever beam is maintained at resonance using simple closed-loop electronics. The current-induced magnetic field produced by the coil changes the viscosity of the MR fluids and produces an additional stiffness to the resonating cantilever beam. The shift in resonant frequency due to the change in viscosity of the MR fluid is measured, and the shift in frequency is related to the input electrical current to the coil. The analytical model of the current measurement system is derived, and the results are compared with the experimental results. The resonance-based current measurement system is evaluated for the input current range of 0 to 1 A.
机译：在这项工作中，提出了一种使用磁流变（MR）流体以共振概念测量直流（dc）的新方法。电流测量系统是通过使用压电化悬臂梁与基于电磁线圈的MR流体剪切装置耦合来设计的。悬臂梁通过简单的闭环电子设备保持共振。线圈产生的电流感应磁场改变了MR流体的粘度，并为共振悬臂梁增加了刚度。测量由于MR流体的粘度变化而引起的谐振频率的偏移，并且该频率的偏移与线圈的输入电流有关。推导了当前测量系统的解析模型，并将其与实验结果进行了比较。对基于谐振的电流测量系统的输入电流范围为0至1 A进行评估。

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