A MINIATURIZED ELECTROMAGNETIC ACOUSTIC TRANSDUCER FOR IMPACT ACOUSTIC WAVE DETECTION

被引：1

作者：

Qin, Yexian ^{[1
]}

Xiang, Dan ^{[1
]}

Yang, Yubing ^{[1
]}

Li, Fang ^{[1
]}

机构：

[1] Intelligent Automat Inc, Rockville, MD 20855 USA

来源：

REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 31A AND 31B | 2012年 / 1430卷

关键词：

Electromagnetic Acoustic Transducer (EMAT); Impact Detection; Acoustic Wave; Nondestructive Testing (NDT);

D O I：

10.1063/1.4716328

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A miniaturized electromagnetic acoustic transducer (EMAT) is developed for impact acoustic wave detection. In this new sensor design, two neodymium iron boron (NdFeB) permanent magnets are used to provide high magnetic field and make the EMAT to be compact in size (13x5x5 mm(3)). The effect of a sensor's geometry on its frequency response was numerically analyzed for determining the size of EMAT during the sensor design. Miniaturized EMAT sensors were constructed and tested for detection of impact acoustic waves in aluminum plates of different thicknesses. To validate the experimental results of the EMAT sensor, the impact acoustic waves generated by a small dropping ball have been analytically calculated. Experimental results show good agreement with the analytical ones.

引用

页码：971 / 978

页数：8

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