板壳复合材料结构典型缺陷瞬态热波实时成像检测理论和方法

This work aims to establish the thermographic nondestructive testing theories and methods for the board and shell composites structure based on high-speed reconstruction and real-time processing of the dynamic thermal images sequence. The following studies are intended to be carried out: under the function of transient heat wave, the comprehensive quantitative model of the thermal wave accumulation, dispersion and reflection will be studied for the board and shell composites. Non-uniform distortion problem caused by uneven heat and uneven surface emissivity will be solved. Infrared thermal image reconstruction and real-time processing methods with global optimum capability will be set up, which have high precision of data rapid classification, effective fitting, image enhancement and information fusion. Typical defect indication, quantitative identification and 3-D reconstruction theories of composites with the capability of fusing thermal images information of many sequential frames will be established. Finally, real-time heat wave imaging non-destructive testing theories as well as the system integration techniques will be studied, which have the flexible ability to coordinate the transient heat wave even overlay, rapid detection and precise processing. Through the above researches, the basic theory and common key technology in the constraints of the technology used in engineering practice will be solved effectively. At the same time, it will provide a kind of effective detection method for the composites quality control of aviation and aerospace fields. And the method has the independent intellectual property rights of China. This work has a better theoretical significance and military value.

项目旨在探索基于动态热图序列高速重建和实时处理的板壳复合材料结构瞬态热波成像无损检测理论与方法，拟开展如下研究：建立瞬态热波流场作用下板壳复合材料结构典型缺陷界面热波堆积、反射和散射综合定量计算模型，重点解决板壳结构热加载和表面发射率不均引起的非均匀性畸变问题，研究具有高精度的数据快速分类、高效拟合、热像重构、图像增强和信息融合等全局优化的热图重建和实时处理方法，建立能融合连续多帧热图信息的复合材料典型缺陷有效表征、定量识别和三维重建理论，构建具有瞬态热波均匀覆盖、快速检测与精确处理柔性协调的实时热波成像检测理论和系统集成技术。通过上述研究，有效解决制约热波成像方法广泛应用于工程实践的基础理论和实时检测关键共性技术难题，为我国航空航天领域的先进复合材料结构的质量监控提供一种具有自主知识产权的高效检测手段，项目研究具有较强的理论意义和军事价值。

本项目针对复杂板壳复合材料典型结构缺陷，开展了脉冲激励热波成像无损检测理论和方法研究，分析了瞬态脉冲热波激励作用下典型缺陷界面的热波传导机理，重点解决了热激励源加载和表面发射率不均匀引起的热图序列非均匀性畸变问题，同时研究了热图序列数据快速分类、高效拟合、热像重构、图像增强和缺陷分割等实时处理和分析方法，建立了能融合连续多帧热图信息的典型缺陷有效表征、定量识别和三维重建理论，从而构建起具有瞬态热波均匀覆盖、快速检测与精确处理柔性协调的热波成像检测理论和系统集成技术。通过上述研究，提高了脉冲热波成像技术的检测精度和灵敏度，为我国航空航天领域各种先进复合材料以及复杂结构的缺陷或损伤检测提供了一种高效的无损检测手段，项目研究具有较强的理论意义和工程应用价值，经济、社会和军事效益显著。