Inspection of Aging and Defects of Polyethylene Pipe Joints Based on THz-TDS

被引：2

作者：

Chen Qiang ^{[1
]}

Wang Qiang ^{[2
]}

Gu Xiaohong ^{[1
]}

Yu Yue ^{[3
]}

Ling Zhangwei ^{[4
,5
]}

机构：

[1] China Jiliang Univ, Coll Mech & Elect Engn, Hangzhou 310018, Zhejiang, Peoples R China

[2] China Jiliang Univ, Coll Qual & Safety Engn, Hangzhou 310018, Zhejiang, Peoples R China

[3] China Special Equipment Inspect & Res Inst, Beijing 100029, Peoples R China

[4] Zhejiang Prov Special Equipment Inspect & Res Ins, Hangzhou 310018, Zhejiang, Peoples R China

[5] Key Lab Special Equipment Safety Testing Technol, Hangzhou 310018, Zhejiang, Peoples R China

来源：

LASER & OPTOELECTRONICS PROGRESS | 2019年 / 56卷 / 22期

关键词：

spectroscopy; terahertz time-domain spectroscopy; polyethylene; non-destructive testing; photo-oxidation aging; reflective imaging; TERAHERTZ;

D O I：

10.3788/LOP56.223001

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Herein, the aging and common defects of polyethylene (PE) pipe joints are inspected based on terahertz time-domain spectroscopy (THz-TDS). The reflective indices and absorption coefficients of PE specimens with different aging time arc calculated, and the imaging detection for the typical defects of pipe joints is conducted. It is found that the reflective indices of the PE specimens have no obvious change in 0.2-2.0 THz range after aging for a long time. However, the absorption coefficient shows a decreasing tendency with increasing aging time. Finally, the defects arc imaged using reflective THz-TDS. Pixels around the defect areas arc different from those around nondefect areas in THz images, and the defect position and outline arc revealed in the THz images.

引用

页数：6

共 16 条

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