| 华晟晔,王强,周海婷,金灿华,蒋诚航.高密度聚乙烯埋地燃气管道热熔接头缺陷微波成像检测[J].电子测量与仪器学报,2026,40(5):213-221 |
| 高密度聚乙烯埋地燃气管道热熔接头缺陷微波成像检测 |
| Microwave imaging detection of weld defects in butt fusion piping joints ofHDPE buried gas pipelines |
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| DOI： |
| 中文关键词: HDPE燃气管道 热熔接头 缺陷 微波检测 微波反射系数幅值 |
| 英文关键词:HDPE gas pipeline butt fusion defect microwave detection amplitude of microwave reflection coefficient |
| 基金项目:国家重点研发计划项目（2023YFF0611600）资助 |
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| Author | Institution |
| Hua Shengye | College of Energy Environment and Safety Engineering, China Jiliang University, Hangzhou 310018, China |
| Wang Qiang | College of Energy Environment and Safety Engineering, China Jiliang University, Hangzhou 310018, China |
| Zhou Haiting | College of Energy Environment and Safety Engineering, China Jiliang University, Hangzhou 310018, China |
| Jin Canhua | Hangzhou Special Equipment Inspection Science Research Institute, Hangzhou 310051, China |
| Jiang Chenghang | Hangzhou Special Equipment Inspection Science Research Institute, Hangzhou 310051, China |
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| 摘要点击次数: 240 |
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| 中文摘要: |
| 为解决高密度聚乙烯 (high-density polyethylene，HDPE) 燃气管道热熔接头缺陷检测困难的问题，基于冷焊、过焊缺陷分子链结构特性变化和微波检测原理，提出一种有关微波反射系数幅值的微波成像法，对HDPE燃气管道热熔接头试样典型缺陷（冷焊、过焊）进行检测成像分析。结果表明，冷焊与过焊缺陷在介电常数上存在差异，且可以较好体现在微波反射系数幅值变化上。无缺陷试样热熔接头的微波反射系数幅值平均值在-34 dB左右，含冷焊缺陷试样热熔接头的微波反射系数幅值平均值在-31 dB左右，含过焊缺陷试样热熔接头的微波反射系数幅值平均值在-35 dB左右；微波反射系数幅值会随着吸热时间、焊接温度与焊接压力的减少而升高；将微波反射系数幅值异常的区域与试样缺陷具体位置进行对应，并与数字射线(digital radiographic，DR)检测结果对比，证实该微波成像法对HDPE燃气管道热熔接头的冷焊、过焊缺陷具有更好的检出能力。 |
| 英文摘要: |
| To address the difficulty in detecting defects in butt fusion joints of high-density polyethylene (HDPE) gas pipelines, this paper proposes a microwave imaging method based on the molecular chain structure characteristics of cold welding and over-welding defects, as well as microwave detection principles. This method is used to detect and image typical defects (cold welding and over-welding) in HDPE gas pipeline butt fusion samples. The results show that there are differences in dielectric constant between cold welding and over-welding defects, which can be well reflected in the changes of microwave reflection coefficient amplitude. The average microwave reflection coefficient amplitude of the butt fusion joint of a defect-free sample is around -34 dB, while that of the butt fusion joint with a cold welding defect is around -31 dB, and that of the butt fusion joint with an over-welding defect is around -35 dB. The microwave reflection coefficient amplitude increases as the heat absorption time, welding temperature, and welding pressure decrease. By correlating the areas with abnormal microwave reflection coefficient amplitude with the specific locations of sample defects, and comparing the results with digital radiographic (DR) detection, it is confirmed that this microwave imaging method has better detection capability for cold welding and over-welding defects in HDPE gas pipeline butt fusion joints. |
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