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HSD

Hochschule Düsseldorf
University of Applied Sciences


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Faculty of Media

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Abstract: Autonomous low-cost measuring system - Conception and development of a mobile AR application for the volumetric recording and display of construction pits [DE]

Mathias Langmann, Autonomous low-cost measuring system - Conception and development of a mobile AR application for the volumetric recording and display of construction pits, Hochschule Düsseldorf, Master Thesis, 26.02.2021.

The volumetric documentation of excavations to determinate the mass of soil is a cost-relevant factor and is still carried out in manual delicate work manage- ment during daily construction site operations. The choice of the most suitable measurement method and the resulting accuracy remains unclear, which can result in discrepancies between the client and the contractor. At the same time, the market for inexpensive depth detection sensors is growing steadily with new more precise and more powerful systems. They promise an accurate and modern way to facilitate the work of measurements of a construction pit. The aim of this thesis is the conception and development of a simple mobile augmented reality application, which calculates volume in the construction sector autonomously in real time as well as accompanies and supports the individual processes for a successful measurement through a feedback system. The analysis for the conception and development of a prototype begins with the listing of requirements that a mobile system has to provide for the volume measurement of construction pits. This is followed by the presentation of solutions of other developments that deal with problems similar to this work. Furthermore, different sensor systems are analysed with regard to the underlying measuring principles, the software libraries to be used as well as eligible development platforms. The thesis concludes with an investigation of suitable algorithms for volume calculation. With the results of the analysis, problems to be expected in the recording of excavations and possible solutions are presented in the context of the implementation of a prototype. In addition, the validation of data collected in the spatial recording of excavations shows which information can be conveyed via the feedback system. The information relevant to the user is displayed visually via the user interface or via augmented reality. Finally, the resulting is evaluated. Results show that the set requirements can be met. On the other hand, there is room for improvements to be realized with further development.

Keywords:

Volume determination, Augmented Reality, Construction sites, Depth sensors, Lidar

Supervisor:

Prof. Jens Herder, Dr. Eng./Univ. of Tsukuba
Univ.-Prof. Dr.-Ing. Monika Jarosch

Location:

The research took place at the Virtual Sets and Virtual Environments Laboratory.

VirtuellesStudio

HSD FB 5 VSVR

01.03.2021

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