Anais do IX SIBGRAPI'96 (1996), 39-46
An Automatic Method Based on Image Processing for Measurement of Drop Size Distribution from Agricultural Sprinklers
Paulo Estevão Cruvinel(1), Edson Roberto Minatel (2), Marcos Luiz Mucheroni (2) e Silvio Crestana (1)
(1) EMBRAPA-CNPDIA, Rua XV de Novembro, 1452, 13560-970,
São Carlos, SP, Brazil
(2) UFSCar- Depto de Computação, Rod. Washington Luiz Km 235, 13565-905,
São Carlos, SP, Brazil
cruvinel@cnpdia.embrapa.br
- Abstract:
-
The drop size distribution of sprinkler spray is of practical
importance for two reasons. The first one is because the small
droplets are subject to wind drift, distorting the application
pattern. Second, large droplets possess greater kinetic energy
which is transferred to the soil surface causing particle
dislodgment and pudding that may result in surface crusting
and runoff. We present in this paper a technique based on image
processing for measure drop size distribution from agricultural
sprinklers in automatic mode. This technique has the advantage
of being a direct measurement method that allows to know the
characteristics of agricultural sprinklers, which allows to
study the effects of pressure and nozzle size on the distributions.
The method was obtained using properties of the Fourier for
correlation analysis in frequency domain. Results allow both
farmers to change on existing irrigation systems to cope with
field problems caused by low intake rates and runoff and
development work to improve the uniformity of distribution of
sprays from agricultural sprinklers.
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