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Proceedings of CAD'17, 2017, 227-231
Model-based Next-best-view Planning of Terrestrial Laser Scanner for HVAC Facility Renovation

Eisuke Wakisaka, Shinryo Corporation
Satoshi Kanai, Hiroaki Date, Hokkaido University

Abstract. Recently, building facility renovations have been increasing in the heating, ventilating, and air conditioning (HVAC) industries. Additionally, the reconstruction of as-built 3D models of facilities by laser scanning using a terrestrial laser scanner (TLS) has enabled shorter survey periods and in-depth construction planning. More accurate and efficient on-site laser scanning is currently required for the as-built 3D modeling of HVAC facilities. However, the accuracy of scanned points primarily depends on the incident angle of the laser beam on the object surfaces and the scan range. For registration, the scanned points must have a certain amount of overlap among them. Furthermore, because the system scanning priority considerably differs according to local region and type of construction work, a typical scanner placement that makes it possible to scan all objects in the site without omission is impractical. Hence, in laser scanning for HVAC facilities, an optimum scanner placement is required that satisfies all aspects of scan quality, such as incident angle, scan range, and scan overlap, given the scanning priority and also minimizes the number of scans and amount of occlusion. However, scanner placement is currently decided manually by operators.

Keywords. Next-best-view Planning, Laser Scanning, Structure-from-Motion, Terrestrial Laser Scanner, As-built Modeling

DOI: 10.14733/cadconfP.2017.227-231