埋地燃气聚乙烯管热熔接头的矢量相干全聚焦成像检测分析  

Analysis of vector coherence factor total focusing method for buried gas polyethylene pipe butt fusion joints

作　　者：杨懿 王强[1] 张浩文 胡栋 肖权旌 刘延雷 YANG Yi;WANG Qiang;ZHANG Haowen;HU Dong;XIAO Quanjing;LIU Yanlei(College of Energy Environment and Safety Engineering,China Jiliang University,Hangzhou 310018,China;Tai'an Special Equipment Testing and Research Institute,Tai'an 271000,China;Hangzhou Special Equipment Testing and Research Institute,Hangzhou 310051,China)

机构地区：[1]中国计量大学能源环境与安全工程学院,杭州310018 [2]泰安市特种设备检验研究院,山东泰安271000 [3]杭州市特种设备检测研究院,杭州310051

出　　处：《压力容器》2024年第11期66-73,共8页Pressure Vessel Technology

基　　金：国家重点研发计划项目(2023YFF0611600);浙江省尖兵领雁攻关计划项目(2022C03179)。

摘　　要：针对高密度聚乙烯(HDPE)材料的声衰减和声频散特性导致超声衰减,会影响热熔接头超声相控阵成像检测精度的问题,提出一种改进的矢量相干全聚焦成像算法(IVCF-TFM),应用于HDPE试块中横通孔缺陷(φ2 mm,φ3 mm)和HDPE管道热熔接头孔缺陷(φ2 mm,φ3 mm)的检测试验。结果表明:该算法对于横通孔缺陷(φ2 mm,φ3 mm)深度检测的误差分别为0.9,0.3 mm;对于热熔接头孔缺陷(φ2 mm,φ3 mm)深度检测的误差分别为0.5,0.4 mm;该算法检测信噪比与VCF-TFM相比,4种缺陷处分别提高了3.4,3.6,3.7,2.5 dB;该算法成像效率与TFM和VCF-TFM相比分别降低了3.83%,5.89%。该算法在处理HDPE材料的成像检测中,具有一定的优势和应用前景。The acoustic attenuation and acoustic dispersion characteristics of detect high-density polyethylene(HDPE)materials lead to ultrasonic attenuation,which affects the accuracy of ultrasonic phased array imaging of butt fusion joint.An improved vector coherent factor total focusing method(IVCF-TFM)is proposed and applied to the detection experiments of detect HDPE butt fusion joint holes defects(φ2 mm,φ3 mm)and side-drilled holes defects(φ2 mm,φ3 mm)in HDPE test blocks.The results show that the depth detection errors of side-drilled holes defects(φ2 mm,φ3 mm)are 0.9 mm and 0.3 mm.The depth detection errors of butt fusion joint hole defects(φ2 mm,φ3 mm)depth detection is 0.5 mm and 0.4 mm respectively.Compared with VCF-TFM,the signal-to-noise ratio of the proposed algorithm is improved by 3.4,3.6,3.7 and 2.5 dB respectively.Compared with TFM and VCF-TFM,the imaging efficiency of the proposed algorithm is reduced by 3.83%and 5.89%,respectively.This algorithm has certain advantages and application prospects in the imaging detection of HDPE materials.

关 键 词：高密度聚乙烯管道 全聚焦成像算法 矢量相干因子 指向性 

分 类 号：TH49[机械工程—机械制造及自动化] TB553[理学—物理]