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Microwave Interferometry Inspection of Dielectric Materials

机译：介电材料的微波干涉法检查

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摘要

The portable microwave interferometry system has been successfully applied to measurement of material properties and detection of defects in a wide range of dielectric materials including: advanced aerospace composite matrix ceramics, composite ceramic armor, fiber reinforced resin components, reinforced rubber components and High Density Poly Ethylene (HDPE) pipe. Performance for field and manufacturing applications has been validated on test specimens which included: manufacturing and service induced defects in actual samples and engineered features in specially fabricated surrogates.The portable, non-contact NDE system requires access to only one surface, and no coupling medium. System configuration advances include: hardware evolution to small portable units, development of precision measurement with fixed work stations, and integration in 6 axis fully automated robotic work stations. Related development includes position - self-aware functionality for the handheld probe; permitting direct, handheld examination of components.Metrology and detection capability has been validated using in-process measurement on actual parts; manufacturing and service induced defects in actual parts; specially fabricated surrogates and ballistic impact and non-ballistically damaged specimens. Other NDE methods, including through-transmission X-ray, X-ray computed tomography, destructive examination, and nondestructive measurement are used to verify defects and other detected anomalies. The microwave interference scanning system has been shown to reliably detect cracks, laminar features and material property variations.The development of this portable system will provide a useful tool for nondestructive testing of dielectric materials in the field and in manufacturing environments. Test panels used in this work were provided by the U.S. Army Tank-Automotive Research, Development and Engineering Center (TARDEC), by the U.S. Army Research Laboratory, and by the U.S. Air Force Research Laboratory. This paper will describe the system and present current results. This work is supported by U.S. Army Tank-Automotive Research, Development and Engineering Center (TARDEC), U.S. Army Research Laboratory, U.S. Air Force Research Laboratory under Small Business Innovative Research (SBIR) projects
机译：便携式微波干涉测量系统已成功应用于多种介电材料的材料性能测量和缺陷检测，包括：先进的航空复合基质陶瓷，复合陶瓷铠装，纤维增强树脂组件，增强橡胶组件和高密度聚乙烯（HDPE）管道。现场和制造应用的性能已在测试样本上得到验证，其中包括：实际样品中制造和服务引起的缺陷以及特制替代物中的工程特征。便携式非接触式NDE系统仅需接触一个表面，而无需耦合介质。系统配置的进步包括：硬件发展到小型便携式设备，具有固定工作站的精密测量的开发以及与6轴全自动机器人工作站的集成。相关开发包括位置-手持式探头的自我感知功能；通过对实际零件的过程中测量，已经验证了计量和检测能力；制造和服务引起的实际零件缺陷；特制的替代物和弹道撞击以及未受到弹道破坏的标本。其他NDE方法（包括透射X射线，X射线计算机断层扫描，破坏性检查和非破坏性测量）用于验证缺陷和其他检测到的异常。微波干扰扫描系统已被证明能够可靠地检测裂缝，层流特征和材料性能变化。此便携式系统的开发将为现场和制造环境中的电介质材料的无损检测提供有用的工具。这项工作中使用的测试面板由美国陆军坦克汽车研究，开发和工程中心（TARDEC），美国陆军研究实验室和美国空军研究实验室提供。本文将描述该系统并介绍当前结果。这项工作得到了美国陆军坦克汽车研究，开发和工程中心（TARDEC），美国陆军研究实验室，美国空军研究实验室的小型企业创新研究（SBIR）项目的支持

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