第45卷第1期2024年1月仪器仪表学报ChineseJournalofScientificInstrumentVol.45No.1Jan.2024DOI:10.19650/j.cnki.cjsi.J2311991收稿日期:2023-10-16ReceivedDate:2023-10-16∗基金项目:国家自然科学基金(51975220,52375537)项目资助空调冷凝器管道激光超声导波跨能量层级映射迁移检测方法∗洪晓斌,黄刘伟(华南理工大学机械与汽车工程学院广州510641)摘要:空调冷凝器是空调设备的关键部件,其弯管连接部位由于损伤类型多和几何形状复杂等原因造成传统接触式损伤检测手段难以应用,本文提出一种基于能量映射迁移网络的非接触式激光超声导波无损检测方法。首先,通过小波分解提取烧蚀信号和热弹信号的概貌波形,设计自编码能量映射函数将热弹信号特征空间映射到烧蚀信号特征空间,获得更接近烧蚀信号特征的映射热弹信号。其次,通过能量映射迁移网络对齐映射热弹信号和烧蚀信号特征空间,将网络模型中的域转换误差和样本标签误差之和用作特征空间对齐误差值。最后,对空调冷凝器泄漏、分层和裂纹等损伤进行检测实验验证所提新方法性能,结果表明其损伤识别精度为93.09%,比传统激光热弹激励检测方法提高了7.23%。关键词:空调冷凝器;管道损伤;激光超声导波;深度迁移学习;能量映射中图分类号:TH878文献标识码:A国家标准学科分类代码:460Laserultrasonicguidedwavescrossenergylevelmappingtransferdetectionmethodinair-conditioningcondenserpipelinesHongXiaobin,HuangLiuwei(SchoolofMechanicalandAutomotiveEngineering,SouthChinaUniversityofTechnology,Guangzhou510641,China)Abstract:Theair-conditioningcondenserisakeycomponentofair-conditioningequipment.Itselbowconnectionmakesitdifficulttoapplytraditionalcontactdamagedetectionmethodsduetovarioustypesofdamageandcomplexgeometricshapes.Thisarticleproposesanon-contactlaserultrasonicguidedwavesnon-destructivetestingmethodbasedonanenergymappingtransfernetwork.Firstly,theapproximatewaveformsoftheablationsignalandthethermoelasticsignalareextractedthroughwaveletdecomposition.Anautoencodingenergymappingfunctionisdesignedtomapthethermoelasticsignalfeaturespacetotheablationsignalfeaturespace.Themappedthermoelasticsignalclosetotheablationsignalisobtained.Then,thefeaturespaceofthermoelasticandablationsignalsarealignedthroughtheenergymappingtransfernet...
