Comparison of an Array of EMATs Technique and a Magnetostrictive Sensor Technique for a Guided Wave Inspection of a Pipe
Comparison of an Array of EMATs Technique and a Magnetostrictive Sensor Technique for a Guided Wave Inspection of a Pipe
复制标题
用于管道导波检测的 EMAT 阵列技术与磁致伸缩传感器技术的比较
DOI：
10.4028/www.scientific.net/kem.321-323.780
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Young Suk Kim
中科院分区：
文献类型：
--
作者：
Y. Cheong;H. Jung;Young Suk Kim
从核安全的角度来看，核电站管道泄漏是一个重大问题。由于管道的几何复杂性以及由于高辐射而难以接近，因此很难通过传统的超声波方法对其进行检查。引导超声波方法可用于在恶劣环境下检查管道。基于对管道频散曲线的分析，选择扭转振动模式 T(0,1) 来检测裂纹。 T(0,1)模式具有许多优点，例如从其非色散特性和波结构的角度来看，对裂纹具有更高的灵敏度。扭转模式可以通过使用电磁声换能器（EMAT）阵列技术或磁致伸缩传感器技术来生成。裂纹的可检测性是通过在管道上进行一系列人工刻痕实验来估计的。
The leakage of a pipe in nuclear power plants is a significant concern from the point of view of nuclear safety. Because of the geometrical complexity of a pipe and an inaccessibility due to a high radiation, it is difficult to inspect it by the conventional ultrasonic methods. The guided ultrasonic method can be useful for the inspection of a pipe in those harsh environments. Based on the analysis of the dispersion curves for a pipe, a torsional vibration mode, T(0,1) was selected for the detection of cracks. The T(0,1) mode has many advantages, such as a higher sensitivity for a crack from the viewpoint of its non-dispersion characteristics and its wave structure. The torsional mode can be generated by using either an array of electromagnetic acoustic transducers (EMATs) technique or a magnetostrictive sensor technique. The detectability of the cracks was estimated through a series of experiments with artificial notches on a pipe.