A Synchronized Multipoint Vision-Based System for Displacement Measurement of Civil Infrastructures
This study presents an advanced multipoint vision-based system for dynamic displacement measurement of civil infrastructures. The proposed system consists of commercial camcorders, frame grabbers, low-cost PCs, and a wireless LAN access point. The images of target panels attached to a structure are...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1100/2012/519146 |
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| author | Hoai-Nam Ho Jong-Han Lee Young-Soo Park Jong-Jae Lee |
| author_facet | Hoai-Nam Ho Jong-Han Lee Young-Soo Park Jong-Jae Lee |
| author_sort | Hoai-Nam Ho |
| collection | DOAJ |
| description | This study presents an advanced multipoint vision-based system for dynamic displacement measurement of civil infrastructures. The proposed system consists of commercial camcorders, frame grabbers, low-cost PCs, and a wireless LAN access point. The images of target panels attached to a structure are captured by camcorders and streamed into the PC via frame grabbers. Then the displacements of targets are calculated using image processing techniques with premeasured calibration parameters. This system can simultaneously support two camcorders at the subsystem level for dynamic real-time displacement measurement. The data of each subsystem including system time are wirelessly transferred from the subsystem PCs to master PC and vice versa. Furthermore, synchronization process is implemented to ensure the time synchronization between the master PC and subsystem PCs. Several shaking table tests were conducted to verify the effectiveness of the proposed system, and the results showed very good agreement with those from a conventional sensor with an error of less than 2%. |
| format | Article |
| id | doaj-art-ab6b806d2acf4eb29cbd27bcb64dad7c |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-ab6b806d2acf4eb29cbd27bcb64dad7c2025-02-03T06:13:41ZengWileyThe Scientific World Journal1537-744X2012-01-01201210.1100/2012/519146519146A Synchronized Multipoint Vision-Based System for Displacement Measurement of Civil InfrastructuresHoai-Nam Ho0Jong-Han Lee1Young-Soo Park2Jong-Jae Lee3Department of Civil and Environmental Engineering, Sejong University, Seoul 143-747, Republic of KoreaResearch and Engineering Division, POSCO E&C, Incheon 406-732, Republic of KoreaDepartment of Civil and Environmental Engineering, Sejong University, Seoul 143-747, Republic of KoreaDepartment of Civil and Environmental Engineering, Sejong University, Seoul 143-747, Republic of KoreaThis study presents an advanced multipoint vision-based system for dynamic displacement measurement of civil infrastructures. The proposed system consists of commercial camcorders, frame grabbers, low-cost PCs, and a wireless LAN access point. The images of target panels attached to a structure are captured by camcorders and streamed into the PC via frame grabbers. Then the displacements of targets are calculated using image processing techniques with premeasured calibration parameters. This system can simultaneously support two camcorders at the subsystem level for dynamic real-time displacement measurement. The data of each subsystem including system time are wirelessly transferred from the subsystem PCs to master PC and vice versa. Furthermore, synchronization process is implemented to ensure the time synchronization between the master PC and subsystem PCs. Several shaking table tests were conducted to verify the effectiveness of the proposed system, and the results showed very good agreement with those from a conventional sensor with an error of less than 2%.http://dx.doi.org/10.1100/2012/519146 |
| spellingShingle | Hoai-Nam Ho Jong-Han Lee Young-Soo Park Jong-Jae Lee A Synchronized Multipoint Vision-Based System for Displacement Measurement of Civil Infrastructures The Scientific World Journal |
| title | A Synchronized Multipoint Vision-Based System for Displacement Measurement of Civil Infrastructures |
| title_full | A Synchronized Multipoint Vision-Based System for Displacement Measurement of Civil Infrastructures |
| title_fullStr | A Synchronized Multipoint Vision-Based System for Displacement Measurement of Civil Infrastructures |
| title_full_unstemmed | A Synchronized Multipoint Vision-Based System for Displacement Measurement of Civil Infrastructures |
| title_short | A Synchronized Multipoint Vision-Based System for Displacement Measurement of Civil Infrastructures |
| title_sort | synchronized multipoint vision based system for displacement measurement of civil infrastructures |
| url | http://dx.doi.org/10.1100/2012/519146 |
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