Laminated magnetic flux sensor for thick-steel-plate control
Ki-Hyeon Park
Dong Eon Kim
Seong-Hoon Jeong
Bongkoo Kang
Dept. of Electr. Eng., Pohang Univ. of Sci. & Technol., South Korea;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Apr 2003
Volume: 50,
Issue: 2
On page(s): 379- 384
ISSN: 0278-0046
INSPEC Accession Number: 7569983
Digital Object Identifier: 10.1109/TIE.2003.809408
Current Version Published: 2003-04-08
Abstract
This paper presents a rugged magnetic flux sensor, which can measure the thickness of steel plates and can operate reliably in the poor environment of a warehouse for thick steel plates. The sensor, consisting of a laminated sensing plate and a sensing coil, has a size of 6×6 cm2, and it is embedded inside the core of a lifting magnet. Depending on the thickness of steel plates attached on the lifting magnet, the magnetic permeability of the core and the sensing plate changes. The thickness of steel plates is indirectly measured by measuring the changes in the magnetic flux density of the sensor. The measurement sensitivity of the magnetic flux sensor with laminated sensing plate is much better than that of a sensor with a solid sensing plate. With a proper procedure for securing measurement reliability, it is demonstrated that the sensor can measure up to 13 sheets of 6-mm steel plate.
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