Temperature, pH, and conductivity control of the nutrient solution of an hydroponic greenhouse

Teixeira, C. A.; Ruano, Antonio

http://hdl.handle.net/10400.1/2356

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Authors

Teixeira, C. A.

Ruano, Antonio

Abstract(s)

One of the aspects of modern agriculture is characterised by a culture without soil (hydroponic cultures). These culture techniques are identified by possessing automatic control systems to control the nutrient solution. In first hydroponic cultures this control was accomplished by “on- off” analog controllers that applied a single control law implemented in hardware. Therefore, the changes of the control law resulted in the change of all interface electronics. In digital control implemented by micro-controllers the alteration of such control law is easily performed by changing only a computer program, leaving untouched all the interface hardware. In this way, the use and substitution of the control strategy is improved, as well, the use of advanced control strategies.

URI

http://hdl.handle.net/10400.1/2356

Citation

Teixeira, C. A.; Ruano, A. E. Temperature, pH, and Conductivity Control of the Nutrient Solution of an Hydroponic Greenhouse, Trabalho apresentado em 6th Portuguese Conference on Automatic Control (Controlo 2004), In 6th Portuguese Conference on Automatic Control (Controlo 2004), Faro, 2004.