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    反射导体参数对涡流栅传感器非线性误差影响的仿真分析

    2016-03-03 中国测试李 坤, 陶 卫, 赵 辉, 杨景景, 蔡云泽
    摘  要:涡流栅传感器基于横向电涡流效应设计,其反射导体参数变化对传感器测量准确度的影响比较明显,因此需要对反射导体尺寸、形状参数进行分析和优化,使其能够适应更多高准确度的测量场合。利用有限元分析方法(Maxwell软件)建立涡流栅传感器的线圈、反射导体模型,对不同尺寸、形状参数的反射导体进行仿真计算,分析反射导体长度、宽度、形状变化对涡流栅传感器的影响。分析结果表明:为提高传感器的准确度,反射导体选用略大于线圈长度和尽可能大宽度的两边半圆导体,为传感器选择合理的反射导体参数提供有利参考。
    关键词:Maxwell软件;涡流栅传感器优化;有限元;反射导体
    文献标志码:A       文章编号:1674-5124(2016)01-0126-04
    Simulation analysis of nonlinear error effects of conductor parameters on
    eddy current sensors
    LI Kun, TAO Wei, ZHAO Hui, YANG Jingjing, CAI Yunze
    (Department of Instrument Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China)
    Abstract: Because of lateral eddy current effect, eddy current sensors, if the conductor parameters are changed, will be greatly influenced in terms of measurement precision. Therefore, the size and shape and other parameters of the conductor needs to be analyzed and optimized, so that the sensor can be tuned for more high-precision measurement occasions. Coil and conductor models were created with finite elements analysis(FEA) to emulate and calculate different sizes and shapes of conductors and analyze how the sensor was influenced by the changes in conductor length, width and shape. The analytical results have demonstrated that the measurement precision of the sensor can be enhanced if the conductor is semicircular on both sides, slightly longer than its coil and as wide as possible. The study has provided a good way of choosing rational conductor parameters to improve the measurement precision of eddy current sensors.
    Keywords: Maxwell software; eddy current sensor; FEA; conductor
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