Pregled metod za merjenje proste vodne površine
| Autor: | Gašper Rak, Marko Hočevar, Sabina Kolbl Repinc, Lovrenc Novak, Benjamin Bizjan |
|---|---|
| Rok vydání: | 2023 |
| Předmět: |
turbulent flow
dvofazni tok high-speed imaging laser scanning lasersko skeniranje free water surface Biochemistry Atomic and Molecular Physics and Optics Analytical Chemistry two-phase flow površina proste gladine turbulentni tok measuring methods hitri zajem slik udc:532:626/627 metode meritev Electrical and Electronic Engineering Instrumentation |
| Zdroj: | Sensors, vol. 23, no. 4, 1842, 2023. |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s23041842 |
| Popis: | Turbulent free-surface flows are encountered in several engineering applications and are typically characterized by the entrainment of air bubbles due to intense mixing and surface deformation. The resulting complex multiphase structure of the air–water interface presents a challenge in precise and reliable measurements of the free-water-surface topography. Conventional methods by manometers, wave probes, point gauges or electromagnetic/ultrasonic devices are proven and reliable, but also time-consuming, with limited accuracy and are mostly intrusive. Accurate spatial and temporal measurements of complex three-dimensional free-surface flows in natural and man-made hydraulic structures are only viable by high-resolution non-contact methods, namely, LIDAR-based laser scanning, photogrammetric reconstruction from cameras with overlapping field of view, or laser triangulation that combines laser ranging with high-speed imaging data. In the absence of seeding particles and optical calibration targets, sufficient flow aeration is essential for the operation of both laser- and photogrammetry-based methods, with local aeration properties significantly affecting the measurement uncertainty of laser-based methods. |
| Databáze: | OpenAIRE |
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