This paper presents the design and optimization of a novel eddy current speed sensor for rotating rods and cylindrical shafts. The sensor consists of one excitation coil and two pick-up coils. All coils are stationary; we consider air coils, and we also use a magnetic yoke. We utilize a copper coating on an iron rod to increase the sensitivity, and we compare the performance with the performance achieved for an uncoated iron rod. 3D FEM is utilized for analyzing and for optimizing the design of the proposed sensor. The main advantages of the novel sensors are their simplicity, their low cost and their robust configuration. A linearity error of 0.5% has been achieved. The level of accuracy is limited by mechanical factors. A 1D analytical model has also been developed for rapid analysis and optimization of the sensor. An aluminum rod was also used in the measurements for a comparison with the results achieved with the iron rod.

中文翻译：

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旋转棒涡流速度传感器的设计与优化

本文介绍了一种用于旋转杆和圆柱轴的新型涡流速度传感器的设计和优化。传感器由一个励磁线圈和两个拾波线圈组成。所有线圈都是静止的；我们考虑空气线圈，我们也使用磁轭。我们在铁棒上使用铜涂层来提高灵敏度，并将其性能与未涂层铁棒的性能进行比较。3D FEM 用于分析和优化所提出的传感器的设计。新型传感器的主要优点是它们的简单性、低成本和坚固的配置。已实现 0.5% 的线性误差。精度水平受机械因素的限制。还开发了一个一维分析模型，用于传感器的快速分析和优化。