| A synchronized multipoint vision-based system for displacement measurement of civil infrastructures. | |
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MedLine Citation:
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PMID: 23028250 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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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%. |
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Authors:
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Hoai-Nam Ho; Jong-Han Lee; Young-Soo Park; Jong-Jae Lee |
Publication Detail:
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Type: Journal Article Date: 2012-09-17 |
Journal Detail:
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Title: TheScientificWorldJournal Volume: 2012 ISSN: 1537-744X ISO Abbreviation: ScientificWorldJournal Publication Date: 2012 |
Date Detail:
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Created Date: 2012-10-02 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101131163 Medline TA: ScientificWorldJournal Country: England |
Other Details:
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Languages: eng Pagination: 519146 Citation Subset: IM |
Affiliation:
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Department of Civil and Environmental Engineering, Sejong University, Seoul 143-747, Republic of Korea. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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