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Encontro de Energia no Meio Rural



Abstract

FONTES, Ivo Reis, CAGNON, José Angelo and RODRIGUES, Ricardo Martini. Sistema de supervisão e controle para casas de vegetação empregando rede wireless de sensores. In Procedings of the 5th Encontro de Energia no Meio Rural, 2004, Campinas (SP) [online]. 2004 [cited 30 May 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022004000200046&lng=en&nrm=iso> .

The present work had as objective the configuration of a supervision and control system for greenhouses applications using a system of data collection of control parameters through a wireless communication network. In agreement with the adopted methodology, its development was accomplished in three different phases. Initially the hardware modules for a Sensors Unit, a Data Concentrator Unit and a capacitive type soil moisture sensor were developed. Soon afterwards an application was configured through a SCADA supervision and control program, the Ellipse PRO, dedicated to the supervision and control of a green house. In the final phase the necessary data were collected for the training of an artificial neural network that is integral part of the humidity sensor. The Sensors Unit and the Data Concentrator Unit were developed starting from microcontrollers of low consumption and high performance and presents excellent cost/benefit relationship. These units are used in the acquisition and data storage of incomings from several sensors applied in the installation. In order to eliminate the inconveniences of a system that uses nets of electric cables connections links of RF was used, with pattern of message of the protocol MODBUS/RTU, for the communication among these units. The application developed through the Ellipse FOR is composed of a group of screens that represents in a virtual way the complete green house environment. Through these screens the operator can alter the operation state of each one of the elements involved in the irrigation and climatization control process. According the cost characteristics, operation flexibility and existent functionality this system represents a solution economically viable in the automation green houses. It can be affirmed that this configuration represents an innovative solution and that can contribute in much for the improvement of cultivated species as well as to provide the necessary ways for the rational use of the resources and production inputs, especially the electric power.

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