This article proposes an absolute-type inductive angle sensor for detecting the position of the YRT turntable bearing. The sensor comprises a multispeed incremental measuring unit and a single-speed absolute measuring unit sharing the same stator, rotor, and excitation circuit. The stator is composed of a ferromagnetic gear groove, two groups of excitation coils, and one group of induction coils arranged according to certain rules. The end cover of the YRT turntable bearing is machined as rotor and it rotated eccentrically relative to the rotation of the stator. A bridge circuit is used to acquire and process the sensor signal from the single-speed measuring unit. Compared with the traditional dual-channel absolute measurement, the proposed measurement method avoids the effects of different magnetic circuit disturbances on signal quality and measurement accuracy, and has more advantages in the volume and weight of the sensor. The structure and working principles of the sensor are presented in detail, the feasibility of sensing scheme is verified via simulation, and a sensor prototype is designed for the final experiment. Experimental results show that the accuracy of the sensor prototype is –0.06758° to 0.1203° before compensation and –0.001139° to 0.0015° after compensation in the range of [0°, 360°], respectively.

中文翻译：

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用于 YRT 转盘轴承位置检测的绝对感应式角位移传感器


本文提出了一种绝对型感应式角度传感器，用于检测YRT转盘轴承的位置。该传感器由共用定子、转子和励磁电路的多速增量测量单元和单速绝对测量单元组成。定子由铁磁齿轮槽、两组励磁线圈、一组按一定规则排列的感应线圈组成。 YRT转盘轴承的端盖加工成转子，相对于定子的旋转进行偏心旋转。桥式电路用于采集和处理来自单速测量单元的传感器信号。与传统的双通道绝对测量相比，所提出的测量方法避免了不同磁路扰动对信号质量和测量精度的影响，并且在传感器的体积和重量方面更具优势。详细介绍了传感器的结构和工作原理，通过仿真验证了传感方案的可行性，并设计了传感器样机进行最终实验。实验结果表明，在[0°，360°]范围内，传感器样机的补偿前精度为–0.06758°至0.1203°，补偿后精度为–0.001139°至0.0015°。