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首页> 外文期刊>Infrared physics and technology >Non-destructive inspection of drilled holes in reinforced honeycomb sandwich panels using active thermography
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Non-destructive inspection of drilled holes in reinforced honeycomb sandwich panels using active thermography

机译：主动热成像技术无损检查蜂窝状夹芯板中的钻孔

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摘要

The aerospace industry is in constant need of ever-more efficient inspection methods for quality control. Product inspection is also essential to maintain the safe operation of aircraft components designed to perform for decades. This paper proposes a method for non-destructive inspection of drilled holes in reinforced honeycomb sandwich panels. Honeycomb sandwich panels are extensively employed in the aerospace industry due to their high strength and stiffness to weight ratios. In order to attach additional structures to them, panels are reinforced by filling honeycomb cells and drilling holes into the reinforced areas. The proposed procedure is designed to detect the position of the holes within the reinforced area and to provide a robust measurement of the distance between each hole and the boundary of the reinforced area. The result is a fast, safe and clean inspection method for drilled holes in reinforced honeycomb sandwich panels that can be used to robustly assess a possible displacement of the hole from the center of the reinforced area, which could have serious consequences. The proposed method is based on active infrared thermography, and uses state of the art methods for infrared image processing, including signal-to-nose ratio enhancement, hole detection and segmentation. Tests and comparison with X-ray inspections indicate that the proposed system meets production needs.
机译：航空航天行业一直需要质量控制效率更高的检查方法。产品检查对于维持旨在运行数十年的飞机部件的安全运行也至关重要。本文提出了一种无损检查蜂窝状夹芯板钻孔的方法。蜂窝夹芯板由于其高强度和刚度与重量之比而广泛用于航空航天工业。为了在其上附加结构，可通过填充蜂窝孔并在增强区域钻孔来增强面板强度。拟议的程序旨在检测孔在增强区域内的位置，并提供对每个孔与增强区域边界之间距离的可靠测量。结果是一种快速，安全和清洁的检查方法，用于检查蜂窝状夹层板中的钻孔，该方法可用于可靠地评估孔距加强区域中心的可能位移，这可能会造成严重后果。所提出的方法基于主动红外热成像技术，并使用最新技术来进行红外图像处理，包括信噪比增强，空穴检测和分割。测试和与X射线检查的比较表明，所建议的系统可以满足生产需求。

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