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Image Reconstruction of Blockage in the Continuous and Stepped Pipelines by Noninvasive Acoustic Method

机译:非侵入式声学方法在连续和阶梯管中堵塞的图像重建

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The image of a semi-circular blockage and location in the uniform and stepped pipe was reconstructed by measuring the eigen-frequency shift of the resonance and anti-resonance frequencies of multi-sine acoustic waves. In this study we have used different boundary conditions from previous works of Wu and Fricke [1] and De Salis and Oldham [2] to determine the blockage cross-sectional area and position. The results agreed with real fractional cross sectional area and position in the both continuous and stepped pipes. New approach showed a better quality of reconstructed Image with small ripple number and the false dummy blockage signal was also reduced. The present method of blockage image reconstruction is a noninvasive nondestructive and cm meet the integrity evaluation implementation for all types of transmission pipeline.
机译:通过测量多正弦声波的谐振和防谐振频率的突出频率来重建半圆形堵塞和均匀和阶梯管中的位置。在这项研究中,我们使用了来自吴和弗里克[1]和德萨利斯和奥尔彻姆[2]的先前作品的不同边界条件,以确定堵塞横截面积和位置。结果同意了连续和阶梯管中的实际分数横截面积和位置。新方法显示出具有小纹波数的更好的重建图像,并且还减少了假伪阻塞信号。本发明的封路图像重建方法是非侵入性的非破坏性和CM满足所有类型传输流水线的完整性评估实现。

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