Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Determining the parameters of cylinders using digital photogrammetry for application to pipe measurement in industrial plants
Bibliography: p.187-193.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
School of Architecture, Planning and Geomatics
2016
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613276844589056 |
|---|---|
| access_status_str | Open Access |
| author | Dingle, Malcolm Robert |
| author2 | Rüther, Heinz |
| author_browse | Dingle, Malcolm Robert Rüther, Heinz |
| author_facet | Rüther, Heinz Dingle, Malcolm Robert |
| author_sort | Dingle, Malcolm Robert |
| collection | Thesis |
| description | Bibliography: p.187-193. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/17545 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:33.643Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | School of Architecture, Planning and Geomatics |
| publisherStr | School of Architecture, Planning and Geomatics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/17545 Determining the parameters of cylinders using digital photogrammetry for application to pipe measurement in industrial plants Dingle, Malcolm Robert Rüther, Heinz Digital photogrammetry Bibliography: p.187-193. The maintenance and expansion of piping systems of petro-chemical plants is a complex and costly process. These costs can be reduced by knowledge of the as-built dimensions and layout of the piping system. As-built Computer Aided Design (CAD) models of such piping systems, specifically the use of Plant Design System (PDS) software packages, allow for more efficient planning than paper plans. Conventional surveying and analogue photogrammetry have been methods that have traditionally been used to capture the necessary CAD information. More recently, the Department of Geomatics at the University of Cape Town has produced software which replicates the analogue photogrammetric approach using digital images (Cammidge, 1996). The objective of this thesis is to develop a pipe measurement technique which can supplement those currently being used and overcome some of their shortcomings. A further objective is to present an overview of the pipe measurement techniques, photogrammetric principles, image processing techniques and programming considerations which would be required to develop a robust, fully functional, pipe measurement software package integrated with a PDS. The author hopes that this thesis will form the foundation for the development of such a software package for local and possibly international industry. A digital photogrammetric technique related to line photogrammetry is developed. This technique makes use of lines in an image which represent the silhouette edges of the cylinder. The use of photogrammetry based on lines avoids some of the shortcomings of conventional point-based photogrammetry. It is not necessary to identify conjugate points in images, nor is it even necessary for overlapping images of the cylinder to be captured. Furthermore, this thesis reports on a number of tests designed to gauge the developed techniques' accuracy and suitability for use in pipe metrology in an industrial plant. The techniques were found to be capable of achieving results which deviated by, on average, 2-3mm in object position and 0.1° in direction from the likely true values of the cylinder axis. The radius could be determined to better than 1 mm. The techniques developed here proved to be suitably accurate for the purpose of determining the parameters of pipes in industrial plants. However, certain factors may reduce the accuracy and these are also discussed. This thesis concludes that a novel digital photogrammetric technique for measuring pipes in an industrial plant was successfully developed. Recommendations are made as to how the technique might be improved to allow sub-millimetre accuracies to be obtained. Finally, a recommendation is made that the information contained within the thesis be used as the basis for designing a digital photogrammetric measurement module to be linked to a PDS. 2016-03-07T04:15:42Z 2016-03-07T04:15:42Z 1998 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/17545 eng application/pdf School of Architecture, Planning and Geomatics Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Digital photogrammetry Dingle, Malcolm Robert Determining the parameters of cylinders using digital photogrammetry for application to pipe measurement in industrial plants |
| thesis_degree_str | Doctoral |
| title | Determining the parameters of cylinders using digital photogrammetry for application to pipe measurement in industrial plants |
| title_full | Determining the parameters of cylinders using digital photogrammetry for application to pipe measurement in industrial plants |
| title_fullStr | Determining the parameters of cylinders using digital photogrammetry for application to pipe measurement in industrial plants |
| title_full_unstemmed | Determining the parameters of cylinders using digital photogrammetry for application to pipe measurement in industrial plants |
| title_short | Determining the parameters of cylinders using digital photogrammetry for application to pipe measurement in industrial plants |
| title_sort | determining the parameters of cylinders using digital photogrammetry for application to pipe measurement in industrial plants |
| topic | Digital photogrammetry |
| url | http://hdl.handle.net/11427/17545 |
| work_keys_str_mv | AT dinglemalcolmrobert determiningtheparametersofcylindersusingdigitalphotogrammetryforapplicationtopipemeasurementinindustrialplants |