Navegando por Autor "Marubayashi, Rodrigo Yudi Palhaci"

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    Dissertação
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    Equipamento alternativo para aquisição georreferenciada de condições climáticas em pulverizações agrícolas
    (Universidade Estadual do Norte do Paraná, 2016-04-26) Marubayashi, Rodrigo Yudi Palhaci; Oliveira, Rone Batista de; https://orcid.org/0000-0002-3071-4827; http://lattes.cnpq.br/2379804514613050; Oliveira, Rone Batista de; https://orcid.org/0000-0002-3071-4827; http://lattes.cnpq.br/2379804514613050; Gandolfo, Marco Antônio; https://orcid.org/0000-0003-2314-3752; http://lattes.cnpq.br/5560552732033631; Abi-Saab, Otávio Jorge Grigoli; http://lattes.cnpq.br/8437035647330384; Rodrigues, Euripedes Bomfim; https://orcid.org/0000-0001-6531-878X; http://lattes.cnpq.br/9720688699522760; Hasegawa, Marcio Massashiko; https://orcid.org/0000-0001-9722-6142; http://lattes.cnpq.br/7408707673754694
    Variations in weather conditions at the time of application can cause losses in agricultural spraying. Therefore, in this study a methodology was developed to evaluate spatial variability, and the relationship between time and area of occurrence of temperature and relative humidity, collected automatically, georeferenced, and mounted on the agricultural sprayer using sensors installed on the outside of the tractor cab and on the spray bar. Data acquisition was carried out during desiccation of the wheat crop, on 26 and 29 October and 8 November 2015, at 10‑second intervals. The monitoring station was built around an Arduino MEGA 2560 microcontroller, two temperature and relative humidity sensors (model SHT15), an SD‑card storage module, and a GPS module. After assembly, the microcontroller was programmed in the native Arduino environment, based on an open‑source processing platform, using a simplified C‑based language specific to this microcontroller. For installation on the sprayer, an enclosure was designed fitted with an on/off switch, a notebook cooling fan, and a power supply cable. The station was mounted on the exterior of the tractor cab: one SHT15 sensor fixed to the rear of the enclosure, the second SHT15 sensor positioned close to the spray bar, with power supplied to the microcontroller from the tractor battery. Data were interpolated using the Inverse Distance Weighting (IDW) method and analysed for spatial variability, duration, and area of occurrence across temperature classes (<25 °C; 25–30 °C; 30–35 °C; >35 °C) and relative humidity classes (<30%; 30–45%; 45–60%; >60%). The results indicate that spatial variability of temperature and relative humidity differed between the sensors installed on the tractor cab exterior and those on the spray bar. The sensor mounted on the spray bar recorded lower temperatures and higher relative humidity readings than the sensor installed on the cab exterior. In general, both sensors recorded increasing duration and area of occurrence for the first three temperature and relative‑humidity classes.