Standard procedures for carrying out the inspection of the bridge or the assessment of its technical condition and suitability for use, rely on visual assessment made by the inspector and are in a certain part subjective. The main objective of the article is to analyze the applicability of IR as a tool to support the inspections of the structure and equipment elements of bridges. We are looking for the relationship between temperature distribution on an element surface (registered by an infrared camera) and hidden defects, which may be associated with, among others, moisture, discontinuity or delaminations in concrete structures. The study was divided into three parts: numerically simulated experiments of transient heat transfer, laboratory tests of reinforced concrete (RC) slab and some in-situ tests of a real bridge. To improve the effectiveness of damage detection, discrete two-dimensional wavelet transformation was applied.

进行桥梁检查或评估其技术条件和使用适用性的标准程序依赖于检查员的目测评估，并且在某种程度上是主观的。本文的主要目的是分析IR作为支持检查桥梁结构和设备元素的工具的适用性。我们正在寻找（通过红外摄像机记录的）元件表面温度分布与隐藏的缺陷之间的关系，这些缺陷可能与混凝土结构中的水分，不连续或分层有关。这项研究分为三个部分：瞬态传热的数值模拟实验，钢筋混凝土（RC）板的实验室测试以及真实桥梁的一些现场测试。