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Bridge Vertical Deformation Monitoring Using GBSAR Repeat-Pass Observations | ||
| Earth Observation and Geomatics Engineering | ||
| مقاله 5، دوره 7، شماره 1، شهریور 2023 اصل مقاله (1.17 M) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22059/eoge.2023.364843.1141 | ||
| نویسندگان | ||
| Benyamin Hosseiny؛ Jalal Amini* | ||
| School of Surveying and Geospatial Engineering, College of Engineering, University of Tehran, Tehran, Iran | ||
| چکیده | ||
| This study presents the feasibility and performance evaluation of a developed ground-based synthetic aperture radar (GBSAR) system for monitoring vertical displacement in bridge structures. Bridges, as critical transportation infrastructures, require regular assessment to ensure safety. In recent years, ground-based radar and synthetic aperture radar (SAR) systems have demonstrated their effectiveness as non-contact displacement monitoring tools for structural displacement monitoring. This study utilizes a prototype GBSAR system consisting of a W-band radar, TI-AWR1642BOOST, with a maximum signal bandwidth of 4 GHz, incorporated with a 15 cm horizontal mechanical rail to enhance cross-range resolution. To evaluate the performance of the GBSAR, two types of experiments were conducted: laboratory experiments in a controlled situation and outdoor simulations by creating a light-weight bridge and inducing displacements through the addition or removal of loads on its surface. The results obtained from the laboratory experiments showcased a measurement accuracy ranging from 50 to 80 micrometers in vertical displacement, while the results from the simulated bridge showed a final accumulated vertical displacement error below 1 mm. These overall results validate the applicability of the developed GBSAR system for vertical displacement monitoring of structures with sub-millimeter accuracy. | ||
| کلیدواژهها | ||
| Radar remote sensing؛ ground-based synthetic aperture radar؛ terrestrial radar interferometry؛ InSAR؛ Structural health monitoring | ||
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آمار تعداد مشاهده مقاله: 328 تعداد دریافت فایل اصل مقاله: 472 |
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