红外技术2018，Vol.40Issue(1)：79-84,6.
太赫兹时域光谱技术检测复合材料与金属的脱粘缺陷
Detection of the Debonding Defect between a Composite Material and Metal Based on Terahertz Time-Domain Spectroscopy
摘要
Abstract
Based on terahertz time-domain spectroscopy, we propose a method to detect the debonding defect in a bonded structure by the terahertz pulse imaging technique, especially the debonding defect detection of a PMI(Polymethacrylimide) foam material and steel plate bonded structure. By the reflection mode, both bonded and debonded parts were tested. The signal differences between the bonded and debonded parts are obvious, both in the time and frequency domains. The sample was imaged by the amplitude value at different positions, maximum amplitude in the time domain, delay time in the time domain, andamplitude values at different frequencies, and even with amplitude accumulation of all frequencies. Results indicate that the terahertz pulse imaging technique, which is based on terahertz time-domain spectroscopy, can detect the debonding defect of a PMI foam material and steel plate bonded structure. In all images obtained using the different data, the debonding part is clearly distinguishable; however, the imaging quality is different.关键词
太赫兹/无损检测/脱粘缺陷/太赫兹成像Key words
terahertz/nondestructive inspection/debonding defect/terahertz imaging分类
信息技术与安全科学引用本文复制引用
刘陵玉,常天英,杨传法..太赫兹时域光谱技术检测复合材料与金属的脱粘缺陷[J].红外技术,2018,40(1):79-84,6.基金项目
国家国际科技合作专项(2015DFA11200) （2015DFA11200）
山东省重点研发计划(2016GGX101010,2017GGX10108,2017GGX10124,2017GSF20114) （2016GGX101010,2017GGX10108,2017GGX10124,2017GSF20114）
山东省科学院创新工程专项资助,山东省科学院青年科学基金资助项目(2017QN0015). （2017QN0015）
