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碩士論文公告區 |
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| 年度： | 93 | |
| 姓名： | 鄭子揚(Tzu-yang Cheng) | |
| 論文題目(中)： | 建築物之紅外線熱影像法檢測 | |
| 論文題目(英)： | Infrared Thermography in Building Assessment | |
| 摘要(中)： | ||
| 本研究採用紅外線熱影像法進行檢測。此檢測法是以面為單位進行大範圍的檢測，並且檢測時不需要直接接觸到受測物的表面，可以進行遠距離非接觸性的檢測，另外，此檢測法在檢測時不需另外使用任何耗材。因此，此檢測法綜合迅速、安全、經濟等優點，極適合運用於建築物檢測。 本研究的結果顯示，無論受測物是否含水，紅外線熱影像法確實可以檢測到混凝土表面下的缺陷。將紅外線熱影像法結合數值分析法後，可以得到使用紅外線熱影像法檢測的最佳時機，而隨著受測物的各項熱物性的變化，檢測的最佳時機也會改變。將熱影像每一點的溫度沿著時間繪製出降溫曲線後，把降溫曲線做傅立葉轉換即可得到振幅影像及相位影像，在相位影像上可以清楚的看見熱影像難以看見的缺陷，並且可以觀察到缺陷的深度與相位大小有著特殊的關係。無論什麼樣的建築物，若施工品質不佳，以及受到大自然力量的破壞，皆會對結構物整體的安全性造成威脅，將紅外線熱影像法運用於現地檢測，特別是無法直接檢測及高層建築物時，更能突顯出紅外線熱影像法的效果與優點，所以，建築物興建以及受到外力破壞時，應當對該建築物進行安全檢測。 |
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| 摘要(英)： | ||
| Infrared thermography is an efficient tool for surface temperature measurement. In principle, heat transfer in any material is affected by the change in material thermal properties. Localized temperature differences on the surface, which may be caused by the subsurface defects, can be found based on the images produced by an infrared camera. The objective of the current research is to explore the applications of infrared thermography on the building assessment. Three concrete slabs with embedded defects were fabricated. Trials of different inspection procedures were carried out such that the heating time and cooling duration can be optimized for clear thermal images. Furthermore, numerical simulation based on finite-difference formulations indicated that the surface temperature differences are strongly affected by the thickness of both the defect and the concrete cover. The conclusions drawn from results of trial inpection and those of numerical simulation are as the following. The difference in surface temperature increases as the defect area or the heating time increases. The difference in surface temperature as the thickness of concrete cover increases. | ||
| 檔案： | 沒有相關檔案 | |
| 相關連結： | http://ethesys.lib.cyut.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-0816105-084951 | |