Experimental Studies of an Eddy Current Transducer with Spatially Periodic Fields

B. Gorkunov, S. Lvov, Tamer Shaiban, Y. Borysenko
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引用次数: 1

Abstract

The purpose of this study is to perform a comparative analysis of the experimentally obtained and calculated values of the measuring windings total EMF amplitudes of the eddy current transducer with spatially periodic fields when magnetic and nonmagnetic cylindrical product are placed in it. To realize this goal in the work, a transducer with translational symmetry of excitation magnetic field has been developed. Translation symmetry typical example is the field of a long current conductor. The paper considers quasi-static electromagnetic field with the wavelength that exceeds characteristic transverse dimensions of conductor and cylinder. As the study result it is seen a satisfactory coincidence of the calculated and experimentally obtained values of the EMF of the transducer output signal in the cases of the product absence and with variety of products. As for example for measuring windings with angular coordinates φ = 30° and 60° an error of voltage values difference is less than 10%. The study shows that the advantage of such transducers while operating on one fixed frequency is capability to perform the multi-parameter testing on account of processing of certain amount of some spatial harmonics of excitation field.
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空间周期场涡流传感器的实验研究
本研究的目的是对比分析放置磁性和非磁性圆柱形产品时,具有空间周期场的涡流换能器的测量绕组总电动势幅值的实验所得值和计算值。为了在工作中实现这一目标,研制了一种具有激发磁场平动对称性的换能器。平移对称的典型例子是长电流导体的磁场。本文考虑了波长超过导体和圆柱体的特征横向尺寸的准静态电磁场。研究结果表明,换能器输出信号的电动势在无产品和多种产品情况下的计算值与实验值吻合得很好。例如,测量角坐标φ = 30°和60°的绕组,电压值差的误差小于10%。研究表明,该换能器在固定频率下工作时,由于处理了一定数量的励磁场空间谐波,可以进行多参数测试。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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