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一种用于提高信号幅度的螺旋线圈电磁超声换能器的改进设计。

An Improved Design of the Spiral-Coil EMAT for Enhancing the Signal Amplitude.

作者信息

Jia Xiaojuan, Ouyang Qi, Zhang Xinglan

机构信息

Institute of Smart Engineering, School of Automation, Chongqing University, Chongqing 400044, China.

出版信息

Sensors (Basel). 2017 May 12;17(5):1106. doi: 10.3390/s17051106.

DOI:10.3390/s17051106
PMID:28498307
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5470782/
Abstract

The low energy transition efficiency of electromagnetic ultrasonic transducer (EMAT) is a common problem in practical application. For the purpose of enhancing the amplitude of the received signal, an improved double-coil bulk wave EMAT is proposed for the thickness measurement of metallic block. This new configuration of magnets consists of a solid cylindrical magnet and a ring-shaped magnet encircling the outer side of the solid cylindrical one. A double-coil was applied instead of a single spiral-coil. Numerical simulations were performed to analyze and optimize the proposed configuration of the EMAT by the 2-D axisymmetric finite element model (FEM). The experiment effectively verifies the rationality of the new configuration and the feasibility of improving the signal strength.

摘要

电磁超声换能器（EMAT）在实际应用中存在能量转换效率低的普遍问题。为提高接收信号的幅度，提出了一种改进的双线圈体波EMAT用于金属块厚度测量。这种新型磁体结构由一个实心圆柱形磁体和一个环绕在实心圆柱形磁体外侧面的环形磁体组成。采用双线圈代替单螺旋线圈。通过二维轴对称有限元模型（FEM）进行数值模拟，以分析和优化所提出的EMAT结构。实验有效验证了新结构的合理性以及提高信号强度的可行性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/33bb157c4cba/sensors-17-01106-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/8f9e9db17692/sensors-17-01106-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/4590566357c7/sensors-17-01106-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/6a37ecbe4df9/sensors-17-01106-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/305f3e6c0e70/sensors-17-01106-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/f64a493538b9/sensors-17-01106-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/32e70903b33b/sensors-17-01106-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/33bb157c4cba/sensors-17-01106-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/8f9e9db17692/sensors-17-01106-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/57fd258a6e92/sensors-17-01106-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/3dd03d66600f/sensors-17-01106-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/ea48e0b71468/sensors-17-01106-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/4590566357c7/sensors-17-01106-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/6a37ecbe4df9/sensors-17-01106-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/305f3e6c0e70/sensors-17-01106-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/f64a493538b9/sensors-17-01106-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/32e70903b33b/sensors-17-01106-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1b0/5470782/33bb157c4cba/sensors-17-01106-g010.jpg

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