Žan Pleterski (Avtor), Marko Hočevar (Avtor), Benjamin Bizjan (Avtor), Sabina Kolbl (Avtor), Gašper Rak (Avtor)

Povzetek

This paper presents a photogrammetry-based system for capturing turbulent aerated flow topography in a laboratory environment, especially for complex hydraulic phenomena character-ised by turbulent, non-stationary, and non-homogeneous aerated flows. It consists of ten high-resolution cameras equipped with monochromatic sensors and custom-built LED lights, all synchronised for accurate data acquisition. Post processing involves Structure-from-Motion and Multi-View Stereo techniques to calculate exterior and interior orientation parameters that ensure accurate alignment within a desired coordinate system, and conversion to point clouds. The proposed method showed great potential for capturing free water surface topography of turbulent aerated flows with high spatial and temporal resolution over the entire field of view of the cameras. Due to the unique capabilities of this system, direct comparisons with existing benchmarks were not possible. Instead, average free water surface profiles were derived from selected control cross sections, using 2D LIDAR measurements for verification. Both the LIDAR and photogrammetry averaged profiles showed remarkably good agreement, with deviations within ±20 mm. Validation showed that photogrammetry can be used to measure the complex aerated turbulent free water surface. In this way, this approach, involving consecutive image dataset acquisition at predefined intervals, is proving to be a valuable tool for observing, visualising, analysing, investigating, and gaining a comprehensive understanding of the dynamics of the free water surface.

Ključne besede

turbulenten ozračeni tok;topografija vodne gladine;brezkontaktne merilne metode;structure-from-motion;dinamika voda;turbulent aerated flow;free water surface topography;non-intrusive measuring methods;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FGG - Fakulteta za gradbeništvo in geodezijo
UDK: 532:528.7
COBISS: 166648579 Povezava se bo odprla v novem oknu
ISSN: 2072-4292
Št. ogledov: 17
Št. prenosov: 6
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarni naslov: Meritve kompleksne topografije vodne gladine z uporabo fotorametrijske metode
Sekundarne ključne besede: turbulenten ozračeni tok;topografija vodne gladine;brezkontaktne merilne metode;structure-from-motion;dinamika voda;
Vrsta dela (COBISS): Članek v reviji
Strani: 20 str.
Letnik: ǂVol. ǂ15
Zvezek: ǂiss. ǂ19, [article no.] 4774
Čas izdaje: 2023
DOI: 10.3390/rs15194774
ID: 20386145