Nonlinear Error Correction for Magnetic Encoders

Chuang, Hsiang-Chun; Kung, Chung Wei; Chen, Li-Wu; Jiang, Shyh-Biau

doi:10.1109/jsen.2022.3214575

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…Further development regarding the miniaturization of magnetic sensors is expected to rely on new physical principles (Ripka and Janosek, 2010). In conclusion, state-of-the-art angle and position sensors are not fully telemetric and are limited in scalability (Prelle et al, 2006;Alejandre and Artés, 2007;Chuang et al, 2023;Ellin and Dolsak, 2008;Hao et al, 2009;López et al, 2011). We show an angle and position sensor concept based on metamaterials that is fully telemetric and highly scalable.…”

Section: Introductionmentioning

confidence: 88%

Telemetric angle and position sensing using millimeter-wave metamaterial and a frequency-modulated continuous-wave (FMCW) chip

Schossmann,

Töfferl,

Schmidt

et al. 2024

J. Sens. Sens. Syst.

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Abstract. We present a fully telemetric sensor concept for angle and position measurement. It is based on single-layer millimeter-wave metamaterials that exhibit an anisotropic resonant behavior in interaction with incident electromagnetic waves. The angle of rotation is determined from the reflected millimeter waves of the metamaterial target using a millimeter wave chip transceiver. We use a metamaterial geometry exhibiting anisotropic Fano-type resonant behavior. The Fano-type resonance shows a distinct minimum in the reflection spectrum, even with a single layer of metamaterial. The metamaterial target is manufactured on a printed circuit board (PCB) laminate with low-cost standard manufacturing methods. We present an analytical model estimating the resonance frequency of the metamaterial used. The model allows us to assess whether with the Fano-type metamaterial unit cell structure resonance frequencies in the millimeter wave regime are achievable and compliant with standard PCB manufacturing design rules. We performed proof-of-principle experiments with the metamaterial targets and a vector network analyzer, assisted by a detailed analysis of the sensor effect by means of finite-element method calculations. Finally, we implemented a demonstrator setup containing a state-of-the-art frequency-modulated continuous-wave (FMCW) radar chip and a metamaterial target manufactured with standard PCB manufacturing processes.

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Section: Introductionmentioning

confidence: 88%

Telemetric angle and position sensing using millimeter-wave metamaterial and a frequency-modulated continuous-wave (FMCW) chip

Schossmann,

Töfferl,

Schmidt

et al. 2024

J. Sens. Sens. Syst.

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“…The research [12] considered the problem of nonlinear error that arises when there is a problem of noncoincidence of rotational axes during the rotation of the magnetic encoder, and then designed algorithms to compensate for the correction.…”

Section: Introductionmentioning

confidence: 99%

Research on high-precision encoder based on optical-magnetic combination structure to measure absolute angle

Zhao,

Zhang,

Tian

et al. 2024

Phys. Scr.

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As a kind of sensor for real-time feedback and dynamic monitoring of angular velocity and angular displacement of the system, the common photoelectric encoder is widely used in many fields such as new energy electric vehicles, servo closed-loop control systems, industrial control, security monitoring. In order to improve the resolution and accuracy, a kind of optical and magnetic combined encoder which combines photoelectricity and multi-pole magnetoelectricity is designed in this paper, where the light-blocking disk of photoelectric sensor is designed according to the pseudo-random sequence, and the photoelectric coding is used to determine the magnetic interval of multi-pole. The absolute angle is calculated according to the number of multiple circles plus the angle of single circle. The experimental results at different temperatures (−40 C~100 C) show that the accuracy of the proposed combined encoder can reach ±0.08°, which is improved by 0.37° compared with that of the single-pole encoder. Finally, the combined encoder was applied to the pan-tilt-zoom (PTZ) camera of a video surveillance enterprise, and the experiment showed that its repeated positioning accuracy reached ±0.02°, which is greatly improved compared with single-pole encoder.

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Design and implementation of an encoder calibration system for improved resolution and accuracy in IPMSM drive with embedded software

Wei

2024

Journal of the Chinese Institute of Engineers

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Nonlinear Error Correction for Magnetic Encoders

Cited by 6 publications

References 27 publications

Telemetric angle and position sensing using millimeter-wave metamaterial and a frequency-modulated continuous-wave (FMCW) chip

Telemetric angle and position sensing using millimeter-wave metamaterial and a frequency-modulated continuous-wave (FMCW) chip

Research on high-precision encoder based on optical-magnetic combination structure to measure absolute angle

Design and implementation of an encoder calibration system for improved resolution and accuracy in IPMSM drive with embedded software

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