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首页> 外文期刊>Journal of Nondestructive Evaluation >An Improved Longitudinal Mode Guided Wave Received Sensor Based on Inverse Magnetostrictive Effect for Open End Pipes
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An Improved Longitudinal Mode Guided Wave Received Sensor Based on Inverse Magnetostrictive Effect for Open End Pipes

机译：一种改进的纵向模式引导波接收了基于逆磁致伸缩效果的开口端管的传感器

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摘要

The magnetostrictive guided wave technology is widely applied to inspect pipes. In the meantime, there are many open end pipes need to be tested rapidly. When we studied the lift-off effect of receiving longitudinal mode guided waves in pipes based on the inverse magnetostrictive effect, we found that the rate of change of the magnetic flux in the air and in the pipe wall is the same order of magnitude, but opposite. According to this phenomenon, an improved magnetostrictive guided wave received sensor for open end pipes is provided. Compared with the traditional sensor, the improved sensor includes not only an outside coil and a bias coil but also an inside coil and an accessory structure. The enhanced signal only including the pipe wall is obtained by subtracting the inside coil signal from the outside coil signal. A prototype sensor that can obtain the enhanced signal is developed. The experimental results show that the improved sensor signal's amplitude increases by more than 50% than the traditional sensor and the noise is almost changeless. The application of the received sensor will help to improve the defect detection capabilities for pipes. However, the sensor could only be applied to inspect the open end pipes.
机译：磁致伸缩引导波技术广泛应用于检查管道。同时，需要快速测试许多开放式管道。当我们研究了基于逆磁致伸缩效应的管道中接收纵向模式导向波的升降效果时，我们发现空气中磁通量和管壁中的磁通量的变化率是相同的数量级，但是对面的。根据这种现象，提供了一种改进的磁致伸缩引导波接收用于开口管的传感器。与传统传感器相比，改进的传感器不仅包括外部线圈和偏置线圈，而且包括内部线圈和附件结构。仅通过从外圈信号中减去内部线圈信号来获得仅包括管壁的增强信号。开发了可以获得增强信号的原型传感器。实验结果表明，改进的传感器信号的幅度比传统传感器增加超过50％，噪音几乎是不变的。接收的传感器的应用将有助于提高管道的缺陷检测能力。但是，只能应用传感器以检查开口端管。

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