Bichurin Mirza I, Petrov Roman V, Leontiev Viktor S, Sokolov Oleg V, Turutin Andrei V, Kuts Victor V, Kubasov Ilya V, Kislyuk Alexander M, Temirov Alexander A, Malinkovich Mikhail D, Parkhomenko Yuriy N
Department of Design and Technology of Radioequipment, Yaroslav-the-Wise Novgorod State University, ul. B. St. Petersburgskaya, 41, 173003 Veliky Novgorod, Russia.
Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology MISiS, Leninskiy Prospekt 4, 119049 Moscow, Russia.
Sensors (Basel). 2020 Dec 13;20(24):7142. doi: 10.3390/s20247142.
The article is devoted to the theoretical and experimental study of a magnetoelectric (ME) current sensor based on a gradient structure. It is known that the use of gradient structures in magnetostrictive-piezoelectric composites makes it possible to create a self-biased structure by replacing an external magnetic field with an internal one, which significantly reduces the weight, power consumption and dimensions of the device. Current sensors based on a gradient bidomain structure LiNbO (LN)/Ni/Metglas with the following layer thicknesses: lithium niobate-500 μm, nickel-10 μm, Metglas-29 μm, operate on a linear section of the working characteristic and do not require the bias magnetic field. The main characteristics of a contactless ME current sensor: its current range measures up to 10 A, it has a sensitivity of 0.9 V/A, its current consumption is not more than 2.5 mA, and its linearity is maintained to an accuracy of 99.8%. Some additional advantages of a bidomain lithium niobate-based current sensor are the increased sensitivity of the device due to the use of the bending mode in the electromechanical resonance region and the absence of a lead component in the device.
本文致力于对基于梯度结构的磁电（ME）电流传感器进行理论和实验研究。众所周知，在磁致伸缩 - 压电复合材料中使用梯度结构可以通过用内部磁场代替外部磁场来创建自偏置结构，这显著降低了设备的重量、功耗和尺寸。基于梯度双畴结构铌酸锂（LN）/镍/美特格拉斯且具有以下层厚度的电流传感器：铌酸锂 - 500μm、镍 - 10μm、美特格拉斯 - 29μm，在工作特性的线性部分工作，并且不需要偏置磁场。非接触式磁电电流传感器的主要特性：其电流测量范围高达10A，灵敏度为0.9V/A，电流消耗不超过2.5mA，并且线性度保持在99.8%的精度。基于双畴铌酸锂的电流传感器的一些额外优点是，由于在机电共振区域使用弯曲模式，设备的灵敏度提高，并且设备中没有引线组件。
