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Communication Dans Un Congrès Année : 2016

Characterisation of centrifugal spreaders : from collection trays to high speed stereovision

Résumé

Presenting Author Jürgen Vangeyte - ILVO, Agricultural Engineering, Belgium Description Precision fertilization requires accurate techniques for determining the spread pattern of centrifugal fertilizer spreaders. Traditionally, the spread pattern was determined by measuring the fertilizer distribution on the ground. Because such measurements are time consuming and complex, a high speed stereovision setup and dedicated image processing algorithms were developed for position and motion estimation of fertilizer grains leaving a centrifugal spreader. The measurements are combined with a ballistic flight model to predict the landing points of the individual grains and the actual spread pattern. This presentation will show the different development steps taken and the problems encountered the last 10 years to come to this setup. In a first approach, a two-dimensional imaging technique was used with a small field of view (0.33 m on 0.25 m) only measuring horizontal outlet angle and speed. In a second approach, this 2D approach was further refined using a larger field of view (1 m on 1 m) and using motion estimation techniques inspired from Particle Image Velocimetry (PIV). Finally, a small field of view 3D stereovision system using a high irradiance LED system was developed, able to measure 3D motion and position, and which can therefore be used for inclined spreaders or spreaders with conical disks. Together with the improvement of the measuring system, a 3D ballistic flight model was developed not only including gravitational and drag force, but also Magnus force and drag torque. Simulations using this combined experimental/modelling approach were successfully validated against experimental data. Contributors Simon Cool (ILVO, Technology and Food Science Unit, Agricultural Engineering, 9820 Merelbeke, Belgium), Jan Pieters (Department of Biosystems Engineering, Faculty of Bioscience Engineering, Ghent University, Belgium), Koen Mertens (ILVO, Technology and Food Science Unit, Agricultural Engineering, 9820 Merelbeke, Belgium), David Nuyttens (ILVO, Technology and Food Science Unit, Agricultural Engineering, 9820 Merelbeke, Belgium), Bilal Hijazi (ILVO, Technology and Food Science Unit, Agricultural Engineering, 9820 Merelbeke, Belgium), Julien Dubois (AgroSup Dijon, France), Frederic Cointault (AgroSup Dijon, France), Jürgen Vangeyte (ILVO, Technology and Food Science Unit, Agricultural Engineering, 9820 Merelbeke, Belgium)
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Dates et versions

hal-01600110 , version 1 (02-10-2017)

Identifiants

  • HAL Id : hal-01600110 , version 1
  • PRODINRA : 396452

Citer

Simon Cool, Jan G. Pieters, Koen Mertens, David Nuyttens, Bilal Hijazi, et al.. Characterisation of centrifugal spreaders : from collection trays to high speed stereovision. CIRG-AgEng 2016, International Conférence on Agricultural Engineering, Automation, Environment and Food Safety, Aarhus University [Aarhus]. DNK., Jun 2016, Aarhus, Denmark. ⟨hal-01600110⟩
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