Resumo

GUZMAN LUNA, Ricardo; QUEVEDO NOLASCO, Abel; TIJERINA CHAVEZ, Leonardo  e  CASTRO POPOCA, Martiniano. Acquisition system in real-time meteorological data with PLC. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.8, pp.1701-1713. ISSN 2007-0934.

The objective of this work was to develop a system of acquisition of meteorological data in real time, using a programmable logic controller (PLC) as an alternative within the commercial weather stations. For sensing the air temperature, relative humidity, solar radiation, precipitation, wind speed and direction, commercial sensors were used during 2013, to test the station, in the meteorological station of the Graduate College, Campus Montecillo. The system consists of a PLC (CX1020 model, make Beckhoff), a laptop where an application for real-time monitoring that was developed in Visual Basic 2010 Express and the database MySQL was installed to store information, which can be used for several purposes. The interaction between the PLC and the application of monitoring was performed using wireless communication Wi-Fi. TwinCAT System Manager programs were used (for configuring the hardware) and TwinCAT PLC Control (for programming the PLC). The system operation was evaluated to make comparisons of sensor readings obtained against reference instruments and sensors of a meteorological station Campbell Scientific. The results indicate that it is feasible to use the PLC in the implementation of meteorological stations.

Palavras-chave : automatic stations; meteorology; real time sensors.

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