for Error, and b for ChangeofError
7. The membership functions, a at input Error, b at Change of Error, c at output
The membership function at the input stage is shown in figure ., using triangular shape membership function, and the output is using three singleton memberhip functions. Using the Takagi‐Sugeno Type nferences, the rule base is defined in the form of F‐ TEN rule as follows: IF Error IS A AND ChangeOfError IS B TEN C The A is one of the three conditions of error, ie., Negative, Zero and Positive. While B is one of the the other three conditions of the changeOfError, ie., Negative, Zero and Positive , and the output is the duration of pumping in Short, Normal, or Long. At the defuzzification stage the outputs are averaged by using the same weight equal to . , and the value is used as the time duration to activate the nutrition solution pumping. 2.4. The control of Lighting. n order to let the hydrophonic grow tanks be placed indoors, the it is necessary to provide appropriate lighting to replace the sun‐light. According to Resh 8 and Djaffri the best color spectrum during the vegetation grows, in general is as follows, During Vegetative Period : the blue color spectrum for days. During The generative Period : the red color spectrum for days. During the Period of flowering : the purple color spectrum for days. Figure 8. the driver electronics for the RGB Stripes to the microcontroller. n the hydrophonic system, the lighting uses the combination of red‐green‐ blue RGB LED Stripes, and then it is programmed in the microcontroller to turn on a switch for each colour‐stripe in every thirty days period, so that RGB LED Strip can change the color spectrum every days with stages of change red ‐ blue ‐ purple. The purple colour is the results of having the red and the blue colours together and the green color is not used, can be ignored. The driver electronic for th RGB Led stripes to 42 the microprocessor is shown in figure 8. above. The sequence of switching on and off is given in the table . Switch ‐ ‐ ‐ ‐ ‐ ‐ ... Red Light OFF ON ON OFF ON ON Blue Light ON OFF ON ON OFF ON Green Light OFF OFF OFF OFF OFF OFF Results: BLUE RED PURPLE BLUE RED PURPLE 2.5. The Flood and Drain Sequence. The Flood and Drain of the water so;ution in to the grow tank is arranged by only the onoff period of the pump using a timer generated inside the microcontroller. The power source of the pump is a V DC connected through a relay, driven by a seried transistor to be controlled by the low powered signal from the microcontroller. The period and the length of pumping is predeterminde by the operator , by keying the time period in to the system using the keypad provided.3. Conclusions
n this paper, Automation System for ydroponic Plantation Based on Flood and Drain Method has been designed and built. The system shows promising automated control of the aspects necessary in hydroponics farming using the method by having most those aspect of p, nutrition, lighting, and water flow under good controlled, providing the simplification hydroponics farming process. We had tried to apply the Fuzzy logic control to manage two of those important parameter for vegatable growing wil a success.There is still yet many room for improvements in the system such as using Neural Network or others algorithms in closed loop control of other aspects beside the p, which may be developed in the future. References PRNewswire. [Online].: http:www.prnewswire.comnews‐releases growth‐in‐the‐ hydroponics‐food‐industry‐set‐to‐outpace‐global‐markets‐by‐8 ‐ .html Karsono, Sudibyo, et al. . Hidroponik Skala Rumah Tangga. Jakarta : Agro Media Pustaka Sutioso, r. Yos. . Hidroponik Ala Yos. Jakarta : Penebar Swadaya SA orticulture [Online]. Available: http:sahorticulture.co.zasix‐hydroponic‐systems Resh, oward M. 8 . From Hydroponic Food Production. Woodbridge Press Kleitz, William. . Digital Electronics A Practical Approach. Fourth Edition. New Jersey : Prentice‐all nternational, nc. Bentley, John P. . Principles of Measurement System. Third Edition. Singapore : Longman Scientific Technical Mettler T., , Basic of Titration, Mettler‐Toledo AG, Analytical, C‐8 Schwerzenbach, Switzerland. METTLER T., , A Guide to p Measurement – the theory and practice of laboratory p applications”, Mettler‐Toledo AG, Analytical, C‐8 Schwerzenbach, Switzerland. Djaffri, Andhika Kumara , thesis, Departement of Electrical Engineering, Universitas ndonesia, Kampus U Depok, , ndonesia, in ndonesian .Parts
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