无损检测19Dn2023远东无损检测新技术论坛论文精选DOI:10.11973/wsjc202310004管道缺陷的高分辨率抗噪声定位方法穆为磊，宁昊，孙海亮?，孙艺峰（1.中国海洋大学工程学院，青岛266100；2.北京宇航系统工程研究所，北京100076；3.中国特种设备检测研究院，北京100029）摘要：超声导波技术具有传播距离长、对小损伤灵敏的优点，因此广泛应用在结构的无损检测中。然而，当管道中存在多个相邻的缺陷时，缺陷的反射波会相互重叠，导致损伤定位的分辨率较低。为了提高定位分辨率，建立了一种基于选代优化的管道导波稀疏分解方法，然后在强泄漏噪声干扰下，对试验测得的重叠波包进行分离。与传统的定位方法相比，重构后的波包具有较高的时间分辨率，从而提高了定位分辨率。试验结果表明，该算法在强泄漏干扰噪声条件下能有效识别两个相邻缺陷，定位误差分别为3.33%和4.62%。关键词：管道检测；波包分离；字典中图分类号：TG115.28文献标志码：A文章编号：1000-6656（2023）10-0019-04LocalizationmethodforpipelinedefectswithhighspatialresolutionundernoiseinterrupticMUWeilei',NINGHao',SUNHailiang,SUNYifeng(1.CollegeofEngineering,OceanUniversityofChina,Qingdao266100,China;2.BeijingInstituteofAstronauticalSystemsEngineering,Beijing100076,China;3.ChinaSpecialEquipmentInspectionandResearchInstitute,Beijing100029,China)Abstract:Ultrasonicguidedwavetechnologyiswidelyusedinstructuralnondestructivetestingduetoitslongpropagationdistanceandsensitivitytosmalldamage.However,whentherearemultipledefectsnearlyinthepipeline,thereflectedwavesofthedefectswilloverlapeachother,deducingcomparativelylowlocalizationresolution.Inordertoenhancethelocalizationresolution,asparsedecompositionapproachbasedoniterativeoptimizationforpipelinedetectioniswasfirstlyestablished.Then,understrongleakagenoiseinterference,theoverlappedwavepacketsarewereseparated.Thereconstructedwavepacketsshowedbettertemporalresolution,andsubsequentlyimprovedthelocalizationresolution.Comparedwiththeconventionalpositioningmethod,theproposedalgorithmverifiedbyexperimentcaneffectivelyidentifytwoadjacentdefectsunderstrongleakageinterferencenoise,andthepositioningerrorsare3.33%and4.62%respectively.Keywords:p...
