混凝土結(jié)構(gòu)缺陷的紅外熱成像檢測(cè)識(shí)別技術(shù)
[Abstract]:According to the principle of infrared thermal radiation, we have developed equipment and systems for the active excitation of concrete structures, infrared imaging acquisition, infrared image processing and analysis, etc. The model test of defects such as cavity diseases in bridge structure and the experimental study of highway bridge are also carried out. The experimental results show that the internal defect state of concrete can be judged by receiving the thermal radiation from the concrete surface. But when the concrete structure has no active excitation, the temperature difference of the surrounding medium is small, and the infrared image will not reflect the internal defect state. Under the condition of artificial active excitation of concrete, the temperature field is changed by the influence of the defect medium inside the structure, and the digital thermal infrared imager is developed independently. The thermal image of the temperature field distribution on the surface of concrete is obtained, which realizes the identification of the inner defects of concrete, and not only completes the test work of the model specimen of concrete structure under active excitation. It has also been successfully applied to the defect detection of the bridge structure. The temperature field atlas of the surface of the bridge structure is very clear, which realizes the effective detection and recognition of the defects such as the cavities in the concrete structure of the bridge structure. By comparing the model specimen test with internal defects and the actual bridge test, the accuracy and reliability of the active excitation infrared detection method are analyzed and verified, and the difficulty of rapid detection of internal defect detection of concrete is successfully overcome.
【作者單位】: 交通運(yùn)輸部公路科學(xué)研究院;
【基金】:交通運(yùn)輸部應(yīng)用基礎(chǔ)研究項(xiàng)目(2012319223020)
【分類(lèi)號(hào)】:U446
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