Examination of the Liquid Volume Inside Metal Tanks Using Noncontact EMATs From Outside
Examination of the Liquid Volume Inside Metal Tanks Using Noncontact EMATs From Outside
复制标题
使用非接触式 EMAT 从外部检查金属罐内的液体体积
DOI:
10.1109/tuffc.2020.3022946
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
D. Rueter
中科院分区:
文献类型:
--
作者:
K. Rieger;D. Erni;D. Rueter
This article discusses ultrasound echo examination of the liquid volume inside a metal enclosure using noncontact electromagnetic acoustic transducers (EMATs) from outside the tank. Because only longitudinal sound waves exist in liquids, a novel and powerful EMAT design (kA currents in small coils) with a specifically enhanced transduction of longitudinal ultrasound is presented. Different wall materials (aluminum, steel, and stainless steel) and working frequencies are considered. A particular challenge, in addition to the already weak EMAT signals across an air gap, is the highly reflective interface between the metal wall and liquid because the acoustic impedances of the two media differ considerably. With thicker metal walls (here, 3mm), only either low frequencies <; 100 kHz or frequencies close to the corresponding thickness resonance of the wall (here, about 1 MHz) are more suitable. The higher frequencies are preferred, as they show advantages due to a directed beam profile, shorter wavelengths in the liquid, and an overall better pulse fidelity. The simultaneous operation of several and closely neighboring EMATs demonstrates the feasibility of more demanding detection tasks, ultimately leading toward a 3-D localization inside the liquid using a noncontact EMAT array with eight independent elements.
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DOI:
--
发表时间:
2015
期刊:
International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications
影响因子:
--
作者:
F. Le Bourdais;T. Le Polles;F. Baqué
通讯作者:
F. Baqué
影响因子:
2.4
作者:
Pierre Kauffmann;M. Ploix;J. Chaix;C. Potel;C. Gueudré;G. Corneloup;F. Baqué
通讯作者:
F. Baqué
DOI:
10.1515/teme-2019-0124
发表时间:
2019-12
期刊:
tm - Technisches Messen
影响因子:
--
作者:
K. Rieger;D. Erni;D. Rueter
通讯作者:
K. Rieger;D. Erni;D. Rueter
影响因子:
2.1
作者:
L. Mierczak;Y. Melikhov;D. Jiles
通讯作者:
D. Jiles
影响因子:
3.2
作者:
Ogi, H
通讯作者:
Ogi, H