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
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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。
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.
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.
引文
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[9]罗承刚.电涡流位移传感器线圈电磁场仿真分析[J].传感器与微系统,2008,27(3):24-26.
[10]II JI·卡兰塔罗夫,JI A·采伊特林.电感计算手册[M].北京:机械工业出版社,1992:386-387.
[2]赵辉,马东丽,刘伟文.用于防水数显卡尺的新型感栅式位移传感器设计[J].上海交通大学学报,2004,38(8):1382-1384.
[3]周丹丽,赵辉,刘伟文,等.基于三维有限元的电涡流传感器参数的仿真研究[J].计算机测量与控制,2005,13(6):618-620.
[4]于亚婷,杜平安,廖雅琴.线圈形状及几何参数对电涡流传感器性能的影响[J].仪器仪表学报,2007,28(6):1045-1050.
[5]孟得东,刘凯,梁树甜.空芯电涡流传感器探头线圈特性的研究[J].船电技术,2011,31(1):17-20.
[6]HONGLI Q I,ZHAO H,LIU W W.Characteristics analysis and parameters optimization for the grating eddy current displacement sensor[J].Journal of Zhejiang University Science A,2009,10(7):1029-1037.
[7]姜盈盈,刘伟文,吕春峰,等.涡流栅位移传感器绝对定位可靠性算法[J].传感技术学报,2013,26(11):1478-1482.
[8]LIU W W,ZHAO H,QI H L.Research on novel grating eddy-current absolute-position sensor[J].IEEE Transac tions on Instrumentation and Measurement,2009,58(10):3678-3683.
[9]罗承刚.电涡流位移传感器线圈电磁场仿真分析[J].传感器与微系统,2008,27(3):24-26.
[10]II JI·卡兰塔罗夫,JI A·采伊特林.电感计算手册[M].北京:机械工业出版社,1992:386-387.