聚乙烯管道夹杂缺陷的微波检测实验研究

Experimental Research on Inclusion Defects in Polyethylene Pipe Using Microwave Detection Technology

受制造工艺、材料性能以及工作环境等因素的影响,聚乙烯管道容易产生夹杂等缺陷。常用的射线检测、超声检测等无损检测方法在聚乙烯管道检测中均存在明显缺点。对新兴的微波检测原理进行了理论推导和分析,介绍了微波在聚乙烯管道缺陷检测中的传输模式和管道缺陷的几何信息幅相反演原理。采用矢量网络分析仪作为微波信号收发机,对聚乙烯管道夹杂缺陷试件进行实验。实验结果证明了幅相信息反演的微波反射检测法在聚乙烯管道夹杂缺陷检测中的有效性。

Polyethylene(PE)pipe defects,such as inclusion defects,are easily affected by factors such as manufacturing process,material characteristics and working environment.Traditional non-destructive testing methods such as X-ray and ultrasonic methods have obvious shortcomings in the defect detection process for PE pipes.The new detection method,microwave detection method,has been theoretically deduced and thoroughly analyzed.At the same time,the microwave transmission mode in PE pipes and the amplitude phase inversion principle for PE pipe inclusion defect geometric information were introduced.Experiments were conducted for PE pipe samples with inclusion defects using vector network analyzer as the transceiver of microwave signals.The experimental results showed that the microwave detection method based on amplitude phase information inversion is effective in the detection process for PE pipes with inclusion defects.