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: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=689298
• 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。我们的建议集中于1-热条带，2- Terahertz成像（远）。****上下文：**** 1 - // INFRARED THOTERography //可以应用于非破坏性评估（NDE）的材料和结构：它称为IR热力学NDE（TNDE）。主动热量表是在我们的提议中加热（或冷却）的。各种材料等也是可能的。由于不同材料在THZ区域具有独特的特征“光谱指纹”。然而，thznde是新的，需要大量工作来增强和解释信号。****目标：****拟议的研究计划的目标是针对解决这些问题的方法**** 1- TNDE：目标是通过热建模和实验进行深入研究，通过热建模和实验，一种新的检测方案：«Indoor-Droone IR热力学调查»。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来说，这种方案是新的，在飞行控制，对象上定位，IR图像缝合，由于螺旋桨引起的对流效果，缺失的热时间序列等方面面临挑战，等等**** 2- THZNDE：目标是在深度处理图像中进行研究，需要进一步的处理步骤以进行进一步的处理，以便深入洞察所观察到的内部结构。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。答应这里提出的工作，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赠款，我们的实验室。配备了TNDE，THZ成像系统和室内无人机。****