A Comparative Study of and Modern Techniques for Accurate Internal Space Measurements

Barre, Christopher (2018) A Comparative Study of and Modern Techniques for Accurate Internal Space Measurements. [USQ Project]


Fixed Terrestrial Laser Scanning (TLS) has gained substantial traction within the surveying industry over the past decade. Mobile Laser Scanning (MLS) is an advancement in the collection of point cloud data from a mobile platform, usually fitted with LiDAR (Light Detection and Ranging) and a range of other sensors to help determine the position of the platform.

A new system known as TIMMS (Trimble Indoor Mobile Mapping Solution) specialises in capturing 3D point cloud data in GNSS denied area such as the service tunnel area mapped for this study. This paper looks at determining if this platform is suitable to map a complete treatment plant to provide a 3d data set for the owner.

In this study, data was collected with a FARO Focus 3D X330 and the TIMMS. A total station was used to radiate to black and white checkerboard targets, with the coordinates determined by a least squares adjustment used as known control points for the georeferencing process. The FARO and TIMMS point clouds were georeferenced onto the same datum. Once on the same datum two planes and several pipes were segmented out from both point clouds for analysis. The accuracy of the point clouds was analysed by looking at the pipe diameters determined from each data set. The quality of the data was analysed by determining how well the modelled pipes and planes fit their respective point clouds.

The results of this study indicated that the accuracy of the FARO and TIMMS were similar. However, the results from the surface analysis indicated that the quality of the TIMMS data was noticeably lower.

The study concluded that the TIMMS should be used to obtain a full data set of the treatment plant service tunnels. It should then be complemented with data from a fixed Terrestrial Laser Scanner in areas that require more detail or a higher quality of data.

A future study is required to analyse more complex features. These features should include valves, pumps and joins of pipes. This would give an in-depth understanding of what the accuracy and quality of the TIMMS data is when looking at complex features.

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Item Type: USQ Project
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: Liu, Xiaoye
Qualification: Bachelor of Spatial Science (Honours) (Surveying)
Date Deposited: 01 Sep 2022 23:25
Last Modified: 27 Jun 2023 04:44
Uncontrolled Keywords: laser scanning; space measurement
URI: https://sear.unisq.edu.au/id/eprint/40742

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