SSIMS-FLOW: Alat za procenu protoka u otvorenim tokovima na osnovu polja površinskih brzina iz video zapisa sa lakih bespilotnih letilica

Abstract

Merenje protoka u otvorenim kanalima često je dugotrajan, invazivan, složen i skup poduhvat, koji neretko uključuje veći broj naročito obučenih rukovaoca opremom, i različite naknadne obrade podataka sa terena. Razvoj tehnologije lakih bespilotnih letelica opremljenih kamerama omogućio je alternativan pristup posrednog merenja protoka putem analize polja površinskih brzina u otvorenom toku. Iako merenja ovom metodom pružaju podatke više merne neizvesnosti od konvencionalnih mernih metoda, opisana procedura beskontaktnog merenja protoka je (1) vremenski efikasnija, (2) zahteva manji broj rukovaoca opremom, (3) primenjiva čak i u određenim uslovima u kojima konvencionalne metode nisu i (4) otvara mogućnost automatizovanog i autonomnog monitoringa vodotoka. Procedura hidrometrijske analize video zapisa još uvek nije standardizovana, i na tržištu se teško pronalazi alat koji uspešno obavlja sve korake neophodne za dobijanje podataka o brzinama i protoku. Alat SSIMS-Flow razvijen je sa ciljem da omogući lak pristup različitim koracima pripreme i procesiranja podataka iz video zapisa u sveobuhvatnom procesu – od pripreme „sirovog“ video zapisa do procene vrednosti protoka – čime se drastično pojednostavljuje primena opisane metoda merenja.

Open-channel flow rate measurement is often a time consuming, invasive, complex, and expensive procedure, which frequently requires involvement of multiple equipment operators and various postprocessing techniques. The development of camera-equipped lightweight unmanned aerial vehicles has enabled an alternative approach of indirect flow rate measurement by analyzing the surface flow velocities. Although the data acquired by this approach experiences somewhat higher measurement uncertainty than that of conventional measurement techniques, such non-contact measurement method is (1) more time efficient, (2) requires fewer operators, (3) can be applied in certain conditions when conventional methods are unfeasible, and (4) allows for automated and autonomous flow monitoring. Hydrometric analyses of video footage are still unstandardized, and finding a suitable tool which successfully deals with all the necessary actions for velocity and flow estimation has proven to be difficult. SSIMS-Flow tool is developed with the aim of providing easy access to different actions of video footage data preparation and processing to enable a holistic process – from preparing a “raw” video footage to the estimation of flow rate – which drastically simplifies the described approach.