本論文提出一個使用模糊邏輯控制的水培系統，調控營養液的導電度及酸鹼值，此系統可以透過傳感器隨時偵測營養液的EC值與pH值，並透過模糊控制的方式，控制調節液幫浦的作用時間，目的是可以升高和降低營養液的EC值和pH值，以維持營養液的EC值與pH值，維持植物的正常生長，控制系統使用Raspberry Pi3開發板來實現與解決營養液的EC值與pH值調節的問題，輸出是經由模糊控制計算出幫浦的ON/OFF的動作時間，以合適的調節量達到符合的設定值。

This paper proposes a hydroponic system using fuzzy logic control. Regulating electrical conductivity and pH of nutrient solutions. The system can detect the EC value and pH value of the nutrient solution through the sensor at any time and pass the fuzzy control method. Control the working time of the adjusting solution pump. The purpose is to increase and decrease the EC value and pH of the nutrient solution. Maintain the EC value and pH of the nutrient solution. Maintain normal plant growth. The control system uses the Raspberry Pi3 development board to achieve and solve the problem of EC value and pH adjustment of the nutrient solution. The output is the ON/OFF operation time of the pump calculated by the fuzzy control. Meet the set value with the appropriate adjustment.

摘要..........................................................i
Abstract.....................................................ii
Acknowledgements............................................iii
Contents.................................................... iv
List of Tables...............................................vi
List of Figures.............................................vii
Chapter 1 Introduction.......................................1
1.1 Literature Review.........................................1
1.2 Motivation................................................7
1.3 Organization of Thesis....................................8
Chapter 2 Hydroponic and Fuzzy Control.......................9
2.1 Hydroponic Cultivation Methods............................9
2.2 Hydroponic Cultivation...................................10
2.3 Fuzzy Theory.............................................12
Chapter 3 Nutrition Solution Regulating System..............21
3.1 System Architecture Design and System Flowchart..........21
3.2 Development Environment..................................22
3.2.1 Introduction of Raspberry Pi...........................23
3.2.2 Arduino Uno............................................24
3.2.3 System Development Software............................25
3.2.4 Bcm2835 Pin Settings...................................26
3.3 Design of Hydroponic Fuzzy Controller....................29
3.4 Introduction to Hydroponic Sensors.......................38
3.4.1 Introduction to EC Sensors.............................38
3.4.2 Introduction to pH Sensors.............................39
3.4.3 Introduction to Handheld EC and pH Sensors.............40
3.4.4 Initial nutrient solution modulation introduction......42
3.4 System Hardware Planning.................................43
Chapter 4 Experiments and Results...........................46
4.1 Introduction to the experimental environment.............46
4.1.1 Pump Output Test.......................................48
4.1.2 Modulation of Initial Nutrient Solution................50
4.2 Nutrient Solution Rise and Fall Test.....................52
4.3 System automatic adjust and control......................55
4.3.1 Use the Control Results of 25 Rules....................55
4.3.2 Use the Control Results of 9 Rules.....................62
4.4 Hydroponic Cultivation Experiment........................69
4.4.1 Controlled Plants......................................70
4.4.2 Uncontrolled Plants....................................74
Chapter 5 Conclusions and Future Works......................79
5.1 Conclusions..............................................79
5.2 Future Works.............................................80
Reference....................................................81
Abstract.....................................................86

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