Control Measurements of Crane Rails Performed by Terrestrial Laser Scanning

Kregar, Klemen; Možina, Jan; Ambrožič, Tomaž; Kogoj, Dušan; Marjetič, Aleš; Štebe, Gašper; Savšek, Simona

doi:10.3390/s17071671

Cited by 13 publications

(7 citation statements)

References 11 publications

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“…Most of them are based on traditional surveying or 3D Terrestrial Laser Scanning (TLS) systems. Kregar, et al [2] used terrestrial laser scanning (TLS) for measuring the geometry of the crane rails such as the positional and altitude deviations, the span, and height differences between the rails. The results also were compared with the one obtained from the classical polar method, which is considered as a reference measurement.…”

Section: Related Workmentioning

confidence: 99%

Implementation and Validation of a High Accuracy UAV-Photogrammetry Based Rail Track Inspection System

et al. 2021

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The regular inspection of the crane tracks of storage cranes at the Container Terminal Altenwerder (CTA), Hamburg requires high accuracy of measurements to determine its position. The allowed tolerances are in the range of 10 mm in the XY plane on a track length of 300 m. The traditional semi-automatic surveying methods are slow and require the interruption of the activities in the storage blocks. The research project AeroInspekt proposed a fully automatic measurement of the position of the tracks using UAV-based photogrammetry. In this paper, the results of the test campaign, carried out in June 2020, were presented where different cameras (150 mm and 80 mm telelens) and flight speeds (1.1 m/s and 1.9 m/s) at a 35 m flying height were performed. Furthermore, an automated rail delineation in the derived surface model was developed and evaluated with ground reference measurements. The results show that the required accuracy of the rail position with an RMSE of 3 mm in XY plane and 8 mm in altitude can be achieved with comparatively less disruption of regular block activities.

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Section: Related Workmentioning

confidence: 99%

Implementation and Validation of a High Accuracy UAV-Photogrammetry Based Rail Track Inspection System

et al. 2021

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“…Marjetič et al [ 49 ] and Kregar et al [ 50 ] presented an alternative approach to controlling measurements of crane rails by applying a special platform on which two precise surveying prisms were fixed.…”

Section: Related Workmentioning

confidence: 99%

An Innovative Approach to Surveying the Geometry of Visibility Triangles at Railway Level Crossings

Kampczyk

2020

Sensors

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Railway level crossings (RLCs) in Poland are classified according to their protection systems. Category D, which is a form of passive RLC, aims to ensure safe and efficient operation. Surveying is essential to prepare and control the geometry of the visibility triangles used at RLCs. This article presents a new approach to monitoring the geometry of visibility triangles of RLCs using an electronic total station and a magnetic measuring square (MMS). Its main assumptions are presented together with the application of the innovative measuring instruments. Visibility is demonstrated taking into account the angles of intersection of the road axis with the track axis of the railway line and additional attributes related to the analysis and evaluation of general visibility conditions. The research highlights controversies that have received special attention against the background of the safety status of railway level crossings. As a case study, the RLC located on a single-track railway line in Poland is examined. The final section presents applications of the results obtained according to the proposed methodology. It is shown that the proposed approach is practical and effective. In addition to surveyors, the survey methodology can be used by road and rail traffic engineers and policy makers to further improve traffic safety at RLCs. This is an important global research task.

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“…Pri uporabi dveh gostot (10 % ali 100 %) so razlike minimalne. Podobno ugotovitev navajamo tudi v Kregar et al (2017). Rezultati so sicer najboljši pri uporabi vseh točk oblaka pri ločljivosti 2 mm (Flerin, 2016).…”

Section: Kakovost Iskanja Robov Oken Iz Oblaka Točk Skeniranega Detajla Glede Na Izmero Tpsunclassified

Geodetic evaluation of building facades for the purpose of energy renovation

Savšek¹,

Flerin²,

Kregar³

et al. 2018

geod. vestn.

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Control Measurements of Crane Rails Performed by Terrestrial Laser Scanning

Cited by 13 publications

References 11 publications

Implementation and Validation of a High Accuracy UAV-Photogrammetry Based Rail Track Inspection System

Implementation and Validation of a High Accuracy UAV-Photogrammetry Based Rail Track Inspection System

An Innovative Approach to Surveying the Geometry of Visibility Triangles at Railway Level Crossings

Geodetic evaluation of building facades for the purpose of energy renovation

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