Wide-Range Displacement Sensor for Vibration Measurement of Magnetically Suspended Air-Blower

Zheng, Lingbo; Nie, Wansheng; Liu, Zhikai; Xiang, Biao

doi:10.1109/jsen.2022.3190403

Cited by 9 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The smaller the diameter of the coil, the smaller the distribution range of the eddy current; however, the sensor sensitivity will drop. In general, for most ECDSs, the measured surface size should be more than three times the probe diameter [17]. When the size of the measured surface is smaller than the required minimum size of the ECDS, the sensitivity of the ECDS will be decreased.…”

Section: Introductionmentioning

confidence: 99%

A magnetic head-based eddy current displacement sensing method

Chen,

Li,

Guo

et al. 2023

Phys. Scr.

View full text Add to dashboard Cite

Eddy current displacement sensors are popular for sensing changes in displacement in industrial fields with many advantages. The eddy current induced by a conventional coil is distributed over a large range and the energy is not concentrated. The size of the minimum measured surface is 1.5 to 3 times the diameter of the coil. A magnetic head-based eddy current displacement sensor is proposed in this paper. Theoretical analysis confirms that the coil generates a highly concentrated magnetic field at the magnetic core gap. The simulations based on the finite element method are performed. The simulation results demonstrate that the proposed method can induce the eddy current field which has a small distribution range and high degree of concentration of energy on the surface of the specimen. Finally, experiments are conducted for different sized ring-shaped surfaces. The high similarity between the experimental results indicates that the magnetic head-based eddy current displacement sensor can induce a highly focused eddy current field with a distribution range of 3 mm. The sensitivity of the sensor is 5 V mm−1 and the spatial resolution of the sensor is 3 mm.

show abstract

Section: Introductionmentioning

confidence: 99%