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Paper lc3-2017-150:
Planning UAV-Assisted Visual Inspections of Construction Sites

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Henk Freimuth, Jan Müller and Markus König

Planning UAV-Assisted Visual Inspections of Construction Sites

Abstract: Inspection flights on construction sites, carried out with Unmanned Aerial Systems (UASs), should be planned with safety as the primary priority. Although the generation of waypoints may be conducted in an automated fashion, with distance-to-object constraints implemented in the algorithm, the visual review of such flight paths by a human operator before take-off is crucial. Apart from safety concerns, finding the right camera orientation for taking photographs of specific details is a non-trivial task when the camera is mounted to an Unmanned Aerial Vehicle (UAV). The inspection planning application should interactively assist the operator with this task.We propose an interactive and simulation-based inspection flight planning concept. A realistic and detailed simulation allows a quick and intuitive insight about generated flight paths and possible shortcomings of such paths in terms of flight safety. Images, rendered from the virtual scene, with the flying camera’s point of view enable the operator to assess the quality of the intended photographs before conducting the flight mission. These previews take into account the main parameters of the camera such as focal length and natural lighting. This minimises the need to readjust parameters or repeat inspection flights to get the right picture.

Keywords: Visual Inspection, Unmanned Aerial Systems, 4D Building Information Modeling, Progress Monitoring, Ground Control, Path Planning

DOI: https://doi.org/10.24928/JC3-2017/0150

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Series: jc3:2017 (browse)
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