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Research on the sensitivity of magnetic levitation (MagLev) devices

Author:
Jun Xie  Peng Zhao  Zhongboyu Jing  Chengqian Zhang  Neng Xia  Jianzhong Fu  


Journal:
Journal of Magnetism and Magnetic Materials


Issue Date:
2018


Abstract(summary):

Highlights • The sensitivity of a magnetic levitation device is analysed. • The improvement of the device creates a higher sensitivity area. • Enables two materials with similar densities to be totally separated. • Enables distinguishing miniscule heterogeneity in a sample. • The improved device is promising in the field of environmental management, and material science. Abstract This paper studied the sensitivity of the magnetic levitation (MagLev) device and the improvement of its sensitivity by enlarging the distance between the two magnets. The sensitivity is defined as the ability of the device to distinguish the difference of density Δ ρ s caused by the change of levitation Δ zh . The improved device has a larger sensitivity in most areas between two magnets. The device also has an area where the sensitivity is much larger (204 mm cm 3  g −1 –305 mm cm 3  g −1 in 2.0 M of MnCl 2 aqueous solution, which is 1.67–2.50 times larger than the previous device). Based on its high sensitivity, the device’s applications of separation and non-destructive testing are assessed. The improved device was able to separate samples with similar densities, while the previous device could not completely distinguish them. Non-destructive testing was advantageous for assessing tiny interior defects. The high sensitivity was beneficial.


Page:
100-100


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