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首页> 外文期刊>Russian Journal of Nondestructive Testing >Determining the distance between antenna arrays and the speed of longitudinal waves in a test object when reconstructing the profile image of the bottom of a weld in ultrasonic testing
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Determining the distance between antenna arrays and the speed of longitudinal waves in a test object when reconstructing the profile image of the bottom of a weld in ultrasonic testing

机译:在超声波测试中重建焊缝底部的轮廓图像时,确定天线阵列之间的距离和测试对象中的纵向波的速度

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摘要

A method is considered for determining the distance between two wedges and the speed of longitudinal ultrasonic waves in a test object when measuring the profile of the surface of pipelines under the bead of a weld. The method makes it possible to reduce the error in determining the profile of the bottom of a pipeline in the course of testing by refining the distance between the wedges and the speed of sound using head-wave pulses. Results of numerical experiments are provided for the processing of echo signals calculated by the finite-difference method in the time domain. The efficiency of the proposed technique is demonstrated with some model experiments.
机译:考虑一种方法,用于在焊缝珠子下测量管道表面的轮廓时,确定在测试对象中的两个楔形和纵向超声波速度之间的距离。 该方法使得可以通过使用头波脉冲的楔形和声速之间的距离来确定在测试过程中确定管道底部的轮廓。 提供了数值实验的结果,用于处理时域中的有限差分方法计算的回波信号。 一些模型实验证明了所提出的技术的效率。

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