主动式红外热成像无损检测系统探测能力和可靠性的定量评估

项目名称： 主动式红外热成像无损检测系统探测能力和可靠性的定量评估

项目编号： No.61505264

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 段玉霞

作者单位： 中南大学

项目金额： 21万元

中文摘要： 无损检测技术的探测能力和可靠性是在工程应用中最被关心的问题之一。探测概率分析作为一种定量评估无损检测系统探测能力和可靠性的技术已经建立了几十年了，它已经被广泛地应用于常规无损检测技术，包括超声、射线、涡流、渗透和磁粉检测等。然而相对于传统无损检测技术，针对主动式红外无损检测技术的探测概率研究却非常有限。在本项目中，我们将设计和制作一系列碳纤维增强复合材料试件，通过探测概率曲线，定量评估主动式红外热成像无损检测技术对于碳纤维增强复合材料常见缺陷（分层缺陷）及损伤（冲击损伤）的探测能力和可靠性，并与超声C扫描的检测结果作对比。我们还将研究被检测件不同表面几何形状对于红外热成像无损检测技术探测能力的影响；研究自动图像分割的算法，并在此基础上进行探测概率分析和假阳性分析。我们希望通过这些研究促进主动式红外热成像无损检测技术从实验室推广到工业应用，尤其是航空航天工业的应用。

中文关键词： 红外热成像；无损检测；可靠性；定量评估；探测概率

英文摘要： The capability and reliability of a nondestructive testing (NDT) technique is one of the most concerns in the industrial application. Probability of Detection (POD) analysis as a quantitative measure to evaluate the inspection capability and reliability of a NDT technique has been established for decades. It is widely used in the traditional NDE techniques, including ultrasonic testing (UT), radiographic testing (RT), eddy-current testing (ET), fluorescent penetrant inspection (FPI) and magnetic particle inspection (MPI). However, contrary to classical NDT techniques for which a significant amount of research have been carried out; a rather limited number of studies on capability and reliability assessment involving active infrared thermography have been published. In this project, we will design and manufacture a set of carbon fiber reinforced polymer (CFRP) specimen which contain common defects (delaminations) and damages (impact damages). Quantitative comparison of the inspection reliability and capability for active infrared thermography and ultrasonic C-scanning techniques through the POD curves will be carried out. The impact of different surface geometries on POD curves will be studied. The method to extract defects automatically by image segmentation will also be presented, and the POD analysis and false positive analysis will be implemented on the basis of image segmentation. We hope this research will advance the wide acceptation of active infrared thermography NDT technique out of laboratory, especially in the aerospace industry, since the reliability and capability of infrared thermography NDT system is quantitatively evaluated, as traditional NDT approaches.

英文关键词： infrared thermography;nondestructive testing;reliability;quantitative evaluation;probability of detection