|
Hokkaido University Collection of Scholarly and Academic Papers >
Theses >
博士 （工学） >
Development of Microwave Non-destructive Inspection Equipment for Outer Wall Tiles
|
Files in This Item:
|
|
|
Related Items in HUSCAP:
|
| Title: | Development of Microwave Non-destructive Inspection Equipment for Outer Wall Tiles |
| Authors: | ALSALEM, Hussain Nasser S Browse this author |
| Keywords: | Electromagnetic wave resistance | | Non destructive inspection | | Multi-layer scanning method | | Scan layer optimization | | Adhesion strength |
| Issue Date: | 23-Mar-2023 |
| Publisher: | Hokkaido University |
| Abstract: | The separation of tiles from buildings degrades the aesthetic appeal of buildings and may result in structural failure. Therefore, tiles should be inspected periodically. However, manual inspections are expensive and require qualified experts. In this study, voids corresponding to tile separation were detected in a concrete specimen using non-destructive inspection based on electromagnetic wave detection. Furthermore, wave reflection models of healthy and defective tiles were created, and the effects of the void plane size on the reflection of defective tiles were considered. The correlation between the void plane size and the reflection intensity difference integral value was verified through multi-layer scanning using these models. The multi-layer scanning method (MLS) provides a qualitative and fundamental solution to this dilemma. Because it is based on multiple scans, it still has the potential to improve the quantity and location of the required scanning layers, increasing the accuracy and speed of the results. MLS was conducted on actual tiled concrete, including several sizes of voids. Comparing the simulation and experimental results showed a possibility of optimizing the number of scan layers. The ability to optimize scanning layers was demonstrated both theoretically and empirically. The aim of discovering the voids under the tiles is to avoid the tiles falling from the building, but the one responsible for the tiles falling is the strength of the adhesion. Therefore, this study presents a method in which the strength of adhesion of tiles can be predicted through the intensity of wave reflection from defective tiles. |
| Conffering University: | 北海道大学 |
| Degree Report Number: | 甲第15550号 |
| Degree Level: | 博士 |
| Degree Discipline: | 工学 |
| Examination Committee Members: | (主査) 教授 田中 孝之, 教授 金井 理, 教授 小野里 雅彦 |
| Degree Affiliation: | 情報科学院(情報科学専攻) |
| Type: | theses (doctoral) |
| URI: | http://hdl.handle.net/2115/90390 |
| Appears in Collections: | 課程博士 (Doctorate by way of Advanced Course) > 情報科学院(Graduate School of Information Science and Technology)
学位論文 (Theses) > 博士 （工学）
|
|
