Single-electromagnet levitation for density measurement and defect detection  

作　　者：Yuhan JIA Peng ZHAO Jun XIE Xuechun ZHANG Hongwei ZHOU Jianzhong FU 

机构地区：[1]The State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027,China [2]Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province,Zhejiang University,Hangzhou 310027,China [3]Jiangsu Jianghuai Magnetic Industry Co.,Ltd.,Huaian 211700,China [4]Tederic Machinery Co.,Ltd.,Hangzhou 311224,China

出　　处：《Frontiers of Mechanical Engineering》2021年第1期186-195,共10页机械工程前沿（英文版）

基　　金：support provided by the Key Research and Development Plan of Zhejiang Province(Grant No.2020C01113);the National Natural Science Foundation of China(Grant Nos.51821093 and 51875519);Zhejiang Provincial Natural Science Foundation of China(Grant No.LZ18E050002).

摘　　要：This paper presents a single-electromagnet levitation device to measure the densities and detect the internal defects of antimagnetic materials.The experimental device has an electromagnet in its lower part and a pure iron core in the upper part.When the electromagnet is activated,samples can be levitated stably in a paramagnetic solution.Compared with traditional magnetic levitation devices,the single-electromagnet levitation device is adjustable.Different currents,electromagnet shapes,and distances between the electromagnet and iron core are used in the experiment depending on the type of samples.The magnetic field formed by the electromagnet is strong.When the concentration of the MnCl aqueous solution is 3 mol/L,the measuring range of the single-electromagnet levitation device ranges from 1.301 to 2.308 g/cm.However,with the same concentration of MnCl aqueous solution(3 mol/L),the measuring range of a magnetic levitation device built with permanent magnets is only from 1.15 to 1.50 g/cm.The single-electromagnet levitation device has a large measuring range and can realize accurate density measurement and defect detection of high-density materials,such as glass and aluminum alloy.

关 键 词：single-electromagnet electromagnetic levitation density measurement defect detection 

分 类 号：TB302[一般工业技术—材料科学与工程]