DC magnetic field type eddy current speed sensor detecting cross magnetization field with amorphous core

Sonoda, T.; Ueda, Ryuzo; Fujitani, Kohei; Irisa, T.; Tatata, S.

doi:10.1109/tmag.1985.1064042

Cited by 17 publications

(6 citation statements)

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“…The eddy current speed sensor could be appropriate option for speed measurement as it is of non-contact nature with cost effective and simple configuration. Recent works in [Cardelli 2013, Itaya 2013, Sonoda 1985, Takehira 1988] concerning eddy current speed sensor were focused on the non-ferromagnetic moving conductive part, mainly aluminum, which is not commonly used material for moving objects in comparison with solid iron and steel. The speed measurement and performance analysis for ferromagnetic moving parts more complicated, because not only conductivity of the moving part, but also its magnetic permeability must be taken into the account.…”

Section: Introductionmentioning

confidence: 99%

A Novel Eddy Current Speed Sensor With a Ferrite E-Core

2020

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This letter presents a novel speed sensor based on the motion induced eddy currents in conductive moving parts. The magnetic yoke is Ferrite core with E shape. The excitation coil is wound around the centre leg of the E-core and two antiserially connected pick up coils are located on the side legs. Solid iron and aluminum materials are considered for the moving part in the simulations and measurements. 2D and 3D finite element methods are used for the detailed analysis and the parametric calculations of the sensor. Excellent linearity is shown despite the sensor simple construction. The analysis and measurements are performed at different speeds and excitation frequencies to evaluate the sensor performance. The minimum achieved linearity error is 0.5%.

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Section: Introductionmentioning

confidence: 99%

A Novel Eddy Current Speed Sensor With a Ferrite E-Core

2020

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“…Magnetic flow meters are used to measure the speed of fluids by reading the voltage caused by speed effects with electrodes in contact with the fluid across the fluid flowing in magnetic fields perpendicular to the direction of the flowing fluid [11] and [25]. A speed sensor using the fluxgate effect in an amorphous ring core to measure the field of eddy currents was presented in [26]. This rather complicated sensor has a poor linearity error of approx.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of an Eddy Current Speed Sensor for Rotating Rods

et al. 2020

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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 pe rformance 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 the ir 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 de veloped 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.

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“…Speed sensor based on linear variable differential transformer (LVDT) operation with ferrite yoke is presented in [7], which was presented for flat type moving part. A speed sensor based on high sensitivity of an amorphous core with ring shape mounted on solid iron E shape core for magnetic field excitation was shown in [8], which has disadvantage of the necessity of using amorphous core with zero-magnetostriction and sharp rectangular B-H curve.…”

Section: Introductionmentioning

confidence: 99%

“…Jm in(8) for coils region for single coil excitation and two antiserially connected coils could be calculated as follows, respectively:…”

mentioning

confidence: 99%

Eddy Current Linear Speed Sensor

et al. 2019

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Novel eddy current speed sensor with axisymmetric coils and solid iron rod as moving part is presented. The analysis is performed both for DC and AC coil currents and for variable iron rod translational speed. The coil inductance and induced voltage results using analytical method and finite element method calculation are compared with measured values. Two different coil configurations are used for simulations and measurement.

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DC magnetic field type eddy current speed sensor detecting cross magnetization field with amorphous core

Cited by 17 publications

References 0 publications

A Novel Eddy Current Speed Sensor With a Ferrite E-Core

A Novel Eddy Current Speed Sensor With a Ferrite E-Core

Design and Optimization of an Eddy Current Speed Sensor for Rotating Rods

Eddy Current Linear Speed Sensor

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