磁流体
环面
变压器
线性可变差动变压器
材料科学
磁芯
磁性放大器
物理
光学
核磁共振
芯(光纤)
电磁线圈
电压
放大器
磁场
光电子学
差分放大器
配电变压器
等离子体
CMOS芯片
量子力学
作者
Tibor Medvegy,Ágnes Molnár,Gergely Molnár,Zoltán Gugolya
标识
DOI:10.1016/j.jmmm.2016.12.026
摘要
In our work, we developed a ferrofluid core differential transformer sensor, which can be used to measure tilt and acceleration. The proposed sensor consisted of three coils, from which the primary was excited with an alternating current. In the space surrounded by the coils was a cell half-filled with ferrofluid, therefore in the horizontal state of the sensor the fluid distributes equally in the three sections of the cell surrounded by the three coils. Nevertheless when the cell is being tilted or accelerated (in the direction of the axis of the coils), there is a different amount of ferrofluid in the three sections. The voltage induced in the secondary coils strongly depends on the amount of ferrofluid found in the core surrounded by them, so the tilt or the acceleration of the cell becomes measurable. We constructed the sensor in several layouts. The linearly coiled sensor had an excellent resolution. Another version with a toroidal cell had almost perfect linearity and a virtually infinite measuring range.
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