A High-Precision Absolute Angular Position Sensor With Vernier Capacitive Arrays Based on Time Grating

Pu, Hongji; Wang, Hewen; Liu, Xiaokang; Yu, Zhicheng; Peng, Kai

doi:10.1109/jsen.2019.2921479

Cited by 18 publications

(4 citation statements)

References 27 publications

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“…This method can offer excellent spatial resolution by increasing the frequency of the time pulses. The performance of the sensor is independent of the hyperfine structure of the grating lines [11]. It has been proved to acquire an error of ±1 arcsec by precisely controlled transmission structure with a time-grating that can not only play a role in the positioning control, but also participate in the calculation of angular displacement for correcting errors [12].…”

Section: Introductionmentioning

confidence: 99%

Research on high-precision calibration device for dual-axis tilt sensor

Zhou,

Wu,

Zheng

et al. 2024

SPIE Future Sensing Technologies 2024

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A dual-axis numerical control rotary table is designed in this article to calibrate a dual-axis tilt sensor. The device comprises a swing axis and a rotating axis, which are used to produce tilts in two perpendicular directions. To achieve precise control of the motion mechanism and enhance positioning accuracy, the time-grating angular displacement sensors have been adopted as the feedback and measurement components in both axes of the device. The experimental results indicate that the error of the swing axis of this calibration device is ±1.5 arcsec, while the error of the rotation axis is ±1.0 arcsec, with a repeatability of less than 0.5 arcsec, which is suitable for the calibration of the majority of dual-axis tilt sensors.

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Section: Introductionmentioning

confidence: 99%

Research on high-precision calibration device for dual-axis tilt sensor

Zhou,

Wu,

Zheng

et al. 2024

SPIE Future Sensing Technologies 2024

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“…The difference with the above sensors is that reduce the processing requirement of grating lines. At the moment, the time-grating inductive sensor, the time-grating capacitive sensor, and the time-grating moving light field sensor [20][21][22][23][24][25][26] have been suitable for industrial production and applications (e.g. rotary table for small and medium-sized machine tool, the high-speed servo motor).…”

Section: Introductionmentioning

confidence: 99%

A novel inductive angular displacement sensor based on time-grating

Sun¹,

Lv²,

Han³

et al. 2022

Meas. Sci. Technol.

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The paper proposes a novel inductive angular displacement sensor based on time-grating to measure large-diameter hollow rotating mechanical components in large science facilities. The sensor design includes a stator, a rotor with two layers of windings. The stator is fabricated according to the dimension of the rotor, which is the large-diameter hollow rotary mechanical components. Based on the electromagnetic induction, the theoretical model of angular displacement measurement is derived by mathematical equations in detail. The sensor design ensures integration of the large-diameter hollow rotating mechanical components with the stator, and solves the problem that the sensors cannot be coaxially installed in the closed-loop control process of large mechanical rotating parts. The performance of the sensor is evaluated by tests of the prototype sensor fabricated by printed circuit board technology, which manifests the effectiveness of the proposed sensor. The results demonstrate the peak-to-peak value of original dynamic error is 124 ″ over 0 ° - 360 ° range, and the measurement error mainly includes first-order and second-order harmonic components. Therefore, the original errors are reduced by optimizing the angular displacement algorithm of the sensor, optimized results demonstrate the final accuracy of the sensor is ±3.5 ″ over the 0 °- 360 ° measurement range.

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“…They are also preferred over optical position sensors as they are immune to dust, compact, and cost-effective. Capacitive sensors provide high-accuracy output but require additional circuitry, thus increasing manufacturing complexity [8]. The Hall effect was discovered by Edwin Hall in 1897.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Fault Detection in Hall-Effect Rotary Encoders for Industry 4.0 Applications

et al. 2022

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Sensors are the foundational components of any smart machine system and are invaluable in all modern technologies. Consequently, faults and errors in sensors can have a significant negative impact on the setup. Intelligent, lightweight, and accurate fault diagnosis and mitigation lie at the crux of modern industries. This study aimed to conceptualize a germane solution in the domain of fault detection, focusing on Hall-effect rotary encoders. Position monitoring through rotary encoders is essential to the safety and seamless functioning of industrial equipment such as lifts and hoists, and commercial systems such as automobiles. This work used multi-strategy learners to accurately diagnose quadrature and offset faults in Hall-effect rotary encoders. The obtained dataset was then run through a lightweight ensemble classifier to train a robust fault detection model. The complete mechanism was simulated through interconnected models simulated in a MATLAB Simulink™ environment. In real time, the developed fault detection algorithm was embedded in an FPGA controller and tested with a 1 kW PMSM drive system. The resulting system is computationally inexpensive and achieves an accuracy of 95.8%, making it a feasible solution for industrial implementation.

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A High-Precision Absolute Angular Position Sensor With Vernier Capacitive Arrays Based on Time Grating

Cited by 18 publications

References 27 publications

Research on high-precision calibration device for dual-axis tilt sensor

Research on high-precision calibration device for dual-axis tilt sensor

A novel inductive angular displacement sensor based on time-grating

Intelligent Fault Detection in Hall-Effect Rotary Encoders for Industry 4.0 Applications

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