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首页> 外文期刊>Key Engineering Materials >Comparison of an Array of EMATs Technique and a Magnetostrictive Sensor Technique for a Guided Wave Inspection of a Pipe
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Comparison of an Array of EMATs Technique and a Magnetostrictive Sensor Technique for a Guided Wave Inspection of a Pipe

机译：用于管道导波检查的EMAT技术阵列和磁致伸缩传感器技术的比较

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摘要

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.
机译：从核安全的角度来看，核电厂中管道的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导致的不可接近性，因此难以通过常规超声方法对其进行检查。引导的超声方法对于那些恶劣环境中的管道检查很有用。基于对管道的色散曲线的分析，选择了扭转振动模式T（0,1）来检测裂纹。 T（0,1）模式具有许多优点，例如从裂纹的非分散特性和波结构的角度来看，它对裂纹的敏感性更高。扭转模式可以通过使用电磁声换能器（EMAT）技术阵列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使用人工缺口进行的一系列实验估算的。

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