Innovative Developments of Infrared Vision for Non Destructive Evaluation

无损评估红外视觉的创新发展

• 批准号: RGPIN-2019-05255
• 负责人: Maldague, Xavier
• 金额: $ 3.35万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=754134
• 关键词: Innovative; Developments; Infrared; Vision; Non

Various bands of the infrared (IR) spectrum are of interest for the inspection of materials through vision techniques. Our proposal focuses on IR thermography in 1 - thermal bands, 2 - terahertz imaging (far IR). CONTEXT: 1 - // Infrared Thermography // can be applied to the Non Destructive Evaluation (NDE) of materials and structures: it is called IR Thermography NDE (TNDE). Active thermography is when the inspected component is heated (or cooled) as in our proposal. Despite being increasingly popular, TNDE presents challenges with many problems either at the stimulation stage or interpretation stage. 2 - // Terahertz (THz) imaging for material inspection // THz has an high potential for NDE such as to assess presence of various subsurface defects in aeronautical composite components, critical humidity levels in various materials, etc. Material analysis is also possible because different materials have unique characteristics «spectral fingerprints» in the THz region. However THzNDE being new, much work is needed to enhance and interpret signals. OBJECTIVES: Objectives of the proposed research program are oriented towards solution of these problems 1- TNDE: Objectives are to study in depth, through thermal modeling and experiments, a new scheme of inspection: «indoor-drone IR thermography inspection». The principle is to have the inspection proceeds over a large surface by a drone. Indoor flying relaxes flight constraints such pilot license, DOT authorizations and rules, flight duration + collecting data (thank to a ceiling umbilical), presence of inclement weather (rain, etc). Such a scheme is new for TNDE with challenges in terms of flight control, positioning over the object, IR image stitching, convective effects due to propellers, missing portions of thermal time sequences, etc. 2- THzNDE: Objectives are to study in depth THz images which need further processing steps in order get a deep insight of the inner structure of the observed specimens. A time-frequency approach is proposed in conjunction with modeling and experiments. Finally a TNDE and THzNDE data fusion is proposed since both modalities analyze the materials following different schemes. CONCLUSIONS: The research program proposes new key directions in the field of NDE by IR imaging. Work presented here is promising, it brings fresh ideas to the IR-NDE community and industrial users while solving critical problems. Several HQPs will be involved at all stages of the proposed research activities. Significance of the proposed activities can be seen on two sides. The basis of the work has a strong theoretical foundation and results of the proposed program are well applied, for instance in Canadian industries where contacts have already been established during previous research activities, to ensure valuable spins-off. NOTE: Thank to RTI NSERC and CFI grants, our lab. is equipped with TNDE, THz imaging systems and a indoor drone.

红外（IR）频谱的各种频段通过视觉技术检查材料。我们的建议重点是1-热条带，2- Terahertz成像（FAR IR）。上下文：1 - //红外热成像//可以应用于材料和结构的非破坏性评估（NDE）：它称为IR热量NDE（TNDE）。主动热成像是在我们的提案中加热（或冷却）的检查组件时。尽管越来越受欢迎，但TNDE在刺激阶段或解释阶段都提出了许多问题。 2 - //用于材料检查的Terahertz（THZ）成像// THz具有很高的NDE潜力，例如评估航空复合组件中各种地下缺陷的存在，各种材料中的关键湿度水平等。材料分析中的关键湿度水平也可能是可能的，因为不同的材料具有独特的特征«Spectral Tremitals«Spectral thz thz区域。但是Thznde是新的，需要大量工作来增强和解释信号。目的：拟议的研究计划的目标是针对解决这些问题的方案1- tnde：目标是通过热建模和实验深入研究，这是一种新的检查方案：«室内无线电IR热力学检查»。原则是要通过无人机在大表面上进行检查。室内飞行限制了诸如飞行执照，DOT授权和规则，飞行持续时间 +收集数据（感谢天花板脐带），存在增量天气（降雨等）。对于TNDE而言，这种方案是新的，在飞行控制，对象的定位，IR图像缝合，由于螺旋桨引起的对流效果，热时间序列的缺失等方面面临挑战。2-Thznde：目标是在深度THZ图像中进行研究，这些图像需要进一步处理步骤，以便进一步处理，以便深入了解观察到的表现的内部结构。与建模和实验一起提出了一种时频方法。最后，提出了TNDE和THZNDE数据融合，因为这两种模式都分析了不同方案的材料。结论：研究计划提出了IR成像中NDE领域的新关键方向。这里提出的工作是有希望的，它为IR-NDE社区和工业用户带来了新的想法，同时解决了关键问题。在拟议的研究活动的所有阶段，将涉及几个HQP。拟议活动的意义在两个方面都可以看到。这项工作的基础具有很强的理论基础，并且提出的计划的结果得到了很好的应用，例如，在加拿大行业中，在以前的研究活动中已经建立了联系，以确保有价值的旋转。注意：感谢RTI NSERC和CFI GRANTS，我们的实验室。配备了TNDE，THZ成像系统和室内无人机。