An Automatic Real-Time Control System of Fertilization and Irrigation
Han Mao · Journal of Jiangsu University of Science and Technology · 2001
The paper analyzes different fertilizer mixers, and develops a fertilizing and irrigating system which is composed of bellows pumps , speed regulating motors , an EC sensor,a pH sensor and a microcomputer. Further more, a real time control program is designed. Several problems, such as fertile liquid and acid liquid flowing reversely , adjustment procedure being too long , the conjunction between fertile concentration adjustment and pH adjustment , signal input being interfered, are resolved. The system can adjust real timely fertilizer concentration and pH of the irrigation fluid,and its control precision can reach 0.5% or even higher. It possesses such functions as alarm, emergency closing, judgement of trouble source. It is highly automatic, and is convenient in operation. The system can also be used in pesticide spray, and is equally applicable in chemical industry and pharmaceutical industry.