基于太赫兹时域光谱的玻璃纤维缺陷深度检测及数据分析  

Defects Depth Inspection and Data Analysis of Glass Fiber Based on THz-TDS

作　　者：郭小弟 王强 谷小红[1] 陈锡爱[1] 范昕炜[2] 

机构地区：[1]中国计量大学机电工程学院,浙江杭州310018 [2]中国计量大学质量与安全工程学院,浙江杭州310018

出　　处：《红外技术》2016年第7期602-606,共5页Infrared Technology

基　　金：浙江省自然科学基金项目(LY14E040002;LQ14F05003);质检公益性行业科研专项资助(201410025)

摘　　要：太赫兹波对很多介电材料和非极性的液体具有透射性且THz波辐射的光子能量低,近年来在无损检测领域得到了较快的发展和应用。基于透射式THz-TDS系统在室温下对包含不同深度缺陷信息的车载气瓶玻璃纤维增强复合材料检测,获得了0.2~1.8 THz范围内样品的时域波形,分析其峰峰值、最大值、延迟时间、折射率和吸收系数,结果表明,随着样品缺陷深度的增加,峰峰值、最大值和延迟时间都有明显的变化规律,同时样品的折射率和吸收系数也不同。可以通过分析时域波形的变化以及折射率和吸收系数的变化,获得缺陷的深度信息。Terahertz wave is able to penetrate dielectric material and non-polar liquids, and its photon energy is low. It was widely used in nondestructive testing fields. The vehicle gas cylinder glass fiber reinforced composite material of including different defects depth information was detected nondestructively at room temperature by the transmission THz-TDS system. The time domain waveform of the sample was gained and its peak-to-peak value, maximum value, the delay time, refractive index and absorption coefficient were analyzed from 0.2 THz to 1.8 THz. The results show that with the increase of the sample defects depth, peak-to-peak value, maximum value and the delay time has obvious variation trend. Additionally, the refractive index and absorption coefficient of the sample are different. The method can be applied to gain the information of the defects depth by analyzing the variation of time domain wave, refractive index and absorption coefficient.

关 键 词：THZ-TDS 玻璃纤维 无损检测 复合材料 

分 类 号：TB322[一般工业技术—材料科学与工程]