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.
Volume determination, Augmented Reality, Construction sites, Depth sensors, Lidar
Prof. Jens Herder, Dr. Eng./Univ. of Tsukuba
Univ.-Prof. Dr.-Ing. Monika Jarosch
The research took place at the Virtual Sets and Virtual Environments Laboratory.