Zhou, Xuebo (2019) Pipeline Monitoring Surveys with Modern Technology. [USQ Project]
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Abstract
Pipeline monitoring surveys are essential to the operation and maintenance of pipelines. However, the sizes and lengths of pipelines as well as the terrains where pipelines have been built on often present challenges to the monitoring surveys especially the field efficiency. While not as accurate and precise as terrestrial laser scanning, the field efficiency of drone-based aerial laser scanning is superior. The combination of both systems may be a suitable solution for pipeline monitoring surveys.
This dissertation has evaluated the achievable accuracy and precision of Leica multi-station MS50 and RIEGL miniVUX – 1UAV with DJI Matrice 600 Pro drone aerial laser scanning system in pipeline monitoring surveys. Moreover, survey targets with various thicknesses were constructed for the task and used to analyse the impacts of angles of incidence and surface reflections on the MS50. The base models and comparison models of the pipeline for the research were developed by both systems and compared by the cloud-to-mesh (C2M), mesh-to-mesh (M2M) and neutral axis comparison method.
The dissertation has observed that grazing angles of incidence have led to biased measurements and strong surface reflections have caused imprecise measurements in the terrestrial laser scanning surveys. In this research, for the MS50, approximately, 10° angle of incidence has caused - 1 mm bias in measurements. By contrast, the RIEGL system is less susceptible to grazing angles of incidence and surface reflections although it cannot achieve the accuracy and precision of 1 mm ± 2.5 mm (within two standard deviations of the measurements) achievable by the MS50. For the RIEGL system, the positional uncertainty is ± 20 mm (within two standard deviations of the measurements) and the survey uncertainty is ± 10 mm (approximately within two standard deviations of the measurements).
The dissertation has concluded that terrestrial laser scanning is currently likely the only laser scanning technique for pipeline monitoring surveys with specified survey precision better than 10 mm or for pipelines with highly localized movements. However, drone-based laser scanning can be an alternative for pipeline monitoring surveys if the specified survey precision is around 10 mm and no other operational constraints. The main drawbacks of drone-based laser scanning are that it cannot achieve the density of point cloud as terrestrial laser scanning can, and due to its low precision, drone-based laser scanning may only observe incremental movements by 10 mm. Given the complexity of pipeline monitoring surveys, the use of both systems is likely to be the solution.
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| Item Type: | USQ Project |
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| Item Status: | Live Archive |
| Faculty/School / Institute/Centre: | Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021) |
| Supervisors: | Gharineiat, Zahra |
| Qualification: | Bachelor of Spatial Science (Honours) (Surveying) |
| Date Deposited: | 23 Aug 2021 01:12 |
| Last Modified: | 27 Jun 2023 04:26 |
| URI: | https://sear.unisq.edu.au/id/eprint/43153 |
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