Performance analysis of passive wheel speed sensor by 3D finite element method

Marcsa, Dániel; Veress, Árpád; Szegletes, János; Oroszváry, László; Molnár, László

doi:10.3233/jae-190002

Cited by 1 publication

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are usually two ways to fulfill the measurement task. One way is to use the back-bias method [21][22][23][24], in which a permanent magnet is used to produce a bias magnetic field nearby the specimen. When the ferromagnetic specimen, such as a gear wheel, moves under the magnet, the magnetic field around the magnet changes.…”

Section: Introductionmentioning

confidence: 99%

A Displacement Sensing Method Based on Permanent Magnet and Magnetic Flux Measurement

Zhang

Shi

Huang

et al. 2022

Sensors

View full text Add to dashboard Cite

This paper proposes a displacement sensing method based on magnetic flux measurement. A bridge-structured magnetic circuit, formed by permanent magnets and two ferromagnetic cores, is designed and discussed. The analyses of the equivalent magnetic circuit and three-dimensional finite element simulations showed that the magnetic flux density changes linearly with the reciprocal of the sum of a constant and the displacement. A prototype sensor of the bridge structure is developed that consists of four permanent magnets as excitation, a Hall sensor as reception, and two ferromagnetic cores as the connection. Experiments have validated the feasibility of this method. The measured results show a good linearity between the sensor’s output and the reciprocal of the sum of a constant and the displacement, with a correlation coefficient greater than 0.9995 across different measurement ranges. Additionally, the measured results significantly indicate that the proposed sensor is compatible with different ferromagnetic materials with a worst-case error of less than 5%. The proposed sensor has the advantages of low cost and good linearity; however, the test object is limited to ferromagnetic materials.

show abstract

Section: Introductionmentioning

confidence: 99%