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Development of high-speed image acquisition systems for spray characterization based on single-droplet experiments

Sofija Vulgarakis Minov (UGent) , Frédéric Cointault, Jürgen Vangeyte, Jan Pieters (UGent) and David Nuytens
(2015) TRANSACTIONS OF THE ASABE. 58(1). p.27-37
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Abstract
Accurate spray and droplet characterization is important for increased understanding of the pesticide spray application process. The goal of this study was to develop two image acquisition systems based on single-droplet experiments using a piezoelectric single-droplet generator and a high-speed imaging technique, which will be used in a later stage of this study to evaluate micro and macro spray characteristics and droplet impact behavior. Experiments with different camera settings, lenses, diffusers, and light sources and the resulting image quality parameters showed the necessity of having a good image acquisition and processing system. The image analysis results contributed to selecting the optimal setup for measuring droplet size and velocity, which consisted of a high-speed camera with 6 mu s exposure time, a microscope lens at a working distance of 430 mm resulting in a field of view of 10.5 mm x 8.4 mm, and a xenon backlight without a diffuser. The high-speed camera with a macro video zoom lens at a working distance of 143 mm with a larger field of view (88 mm x 110 mm) in combination with a halogen spotlight with a diffuser was found to have the best potential for measuring macro spray characteristics, such as the droplet trajectory, spray angle, and spray shape.
Keywords
Image processing, Droplet generator, Droplet characteristics, SIZE, GENERATOR, FORMULATION, SURFACES, VELOCITY, IMPACT

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MLA
Vulgarakis Minov, Sofija, Frédéric Cointault, Jürgen Vangeyte, et al. “Development of High-speed Image Acquisition Systems for Spray Characterization Based on Single-droplet Experiments.” TRANSACTIONS OF THE ASABE 58.1 (2015): 27–37. Print.
APA
Vulgarakis Minov, Sofija, Cointault, F., Vangeyte, J., Pieters, J., & Nuytens, D. (2015). Development of high-speed image acquisition systems for spray characterization based on single-droplet experiments. TRANSACTIONS OF THE ASABE, 58(1), 27–37.
Chicago author-date
Vulgarakis Minov, Sofija, Frédéric Cointault, Jürgen Vangeyte, Jan Pieters, and David Nuytens. 2015. “Development of High-speed Image Acquisition Systems for Spray Characterization Based on Single-droplet Experiments.” Transactions of the Asabe 58 (1): 27–37.
Chicago author-date (all authors)
Vulgarakis Minov, Sofija, Frédéric Cointault, Jürgen Vangeyte, Jan Pieters, and David Nuytens. 2015. “Development of High-speed Image Acquisition Systems for Spray Characterization Based on Single-droplet Experiments.” Transactions of the Asabe 58 (1): 27–37.
Vancouver
1.
Vulgarakis Minov S, Cointault F, Vangeyte J, Pieters J, Nuytens D. Development of high-speed image acquisition systems for spray characterization based on single-droplet experiments. TRANSACTIONS OF THE ASABE. 2015;58(1):27–37.
IEEE
[1]
S. Vulgarakis Minov, F. Cointault, J. Vangeyte, J. Pieters, and D. Nuytens, “Development of high-speed image acquisition systems for spray characterization based on single-droplet experiments,” TRANSACTIONS OF THE ASABE, vol. 58, no. 1, pp. 27–37, 2015.
@article{5863420,
  abstract     = {Accurate spray and droplet characterization is important for increased understanding of the pesticide spray application process. The goal of this study was to develop two image acquisition systems based on single-droplet experiments using a piezoelectric single-droplet generator and a high-speed imaging technique, which will be used in a later stage of this study to evaluate micro and macro spray characteristics and droplet impact behavior. Experiments with different camera settings, lenses, diffusers, and light sources and the resulting image quality parameters showed the necessity of having a good image acquisition and processing system. The image analysis results contributed to selecting the optimal setup for measuring droplet size and velocity, which consisted of a high-speed camera with 6 mu s exposure time, a microscope lens at a working distance of 430 mm resulting in a field of view of 10.5 mm x 8.4 mm, and a xenon backlight without a diffuser. The high-speed camera with a macro video zoom lens at a working distance of 143 mm with a larger field of view (88 mm x 110 mm) in combination with a halogen spotlight with a diffuser was found to have the best potential for measuring macro spray characteristics, such as the droplet trajectory, spray angle, and spray shape.},
  author       = {Vulgarakis Minov, Sofija and Cointault, Frédéric and Vangeyte, Jürgen and Pieters, Jan and Nuytens, David},
  issn         = {2151-0032},
  journal      = {TRANSACTIONS OF THE ASABE},
  keywords     = {Image processing,Droplet generator,Droplet characteristics,SIZE,GENERATOR,FORMULATION,SURFACES,VELOCITY,IMPACT},
  language     = {eng},
  number       = {1},
  pages        = {27--37},
  title        = {Development of high-speed image acquisition systems for spray characterization based on single-droplet experiments},
  url          = {http://dx.doi.org/10.13031/trans.58.10775},
  volume       = {58},
  year         = {2015},
}
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