A Comparative Study of Non-destructive Evaluation of Glass Fiber Reinforced Polymer Composites Using Terahertz, X-ray, and Ultrasound Imaging

作     者：Wang, Jie Zhang, Jin Chang, Tianying Cui, Hong-Liang 

作者机构：Jilin Univ Coll Instrumentat & Elect Engn Changchun 130061 Jilin Peoples R China Qilu Univ Technol Shandong Acad Sci Inst Automat Jinan 250014 Shandong Peoples R China Chinese Acad Sci Chongqing Inst Green & Intelligent Technol Chongqing 400714 Peoples R China 

出 版 物：《INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING》 (精密工程与制造业国际杂志)

年 卷 期：2019年第20卷第6期

页      面：963-972页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0802[工学-机械工程] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 

基　　金：Ministry of Science and Technology of China [2015CB755401] National Natural Science Foundation of China Department of Science & Technology of the Shandong Province [2017GGX10124, 2017GGX10108] Youth Science Funds of Shandong Academy of Sciences [2017QN0015] Innovation Program of Shandong Academy of Sciences 

主　　题：Glass fiber reinforced polymer composites Terahertz X-ray Ultrasound Window-based image processing Image fusion 

摘      要：A set of samples of glass fiber reinforced polymer composites with Teflon inclusions in the shape of pentagram have been specifically designed and fabricated for the purpose of assessing the efficacy and practicality of terahertz (THz) time domain spectroscopy (TDS) system in non-destructive evaluation (NDE), in side-by-side comparison with X-ray computed tomography (CT), and ultrasonic imaging. The samples feature systematic variation of Teflon inclusions of a variety of thicknesses and placement depths. An improved THz imaging algorithm is proposed and demonstrated to enhance the capability of THz-TDS detection by adding an appropriate window for sampling the reflected time-domain waveform a posteriori. Additionally, image fusion algorithm based on block segmentation is applied to combine multiple imaging detection results, leading to further improvement of the final defect detection capability. Comparative analysis of the detection results among THz-TDS, X-ray CT, and ultrasonic imaging is carefully carried out to assess the merits and disadvantages of each technique, and to attempt to find a proper place for THz-TDS imaging in the traditional arsenal of NDE tools.