Design And Research On Intelligent Control System Of Fertilizer Apparatus Performance Test

With the development of precision agriculture, precision fertilization requires more and more about the performance of fertilizing plant as an important component of precision agriculture. Fertilizer feeder is the core component of precise fertilizing plant and its property is the key for the realizing of precise fertilization. How to accurately detect the quality of fertilizer feeder is one prerequisite of precise feeding and also one key point of precise fertilizer feeder design and exploration. But nowadays no special tester for the performance of fertilizer feeder has been designed or reported. This paper designs a new property tester of fertilizer feeder which possesses many advantages such as optimum structure, reliable performance and fast running.The structure of new fertilizer feeder tester is illustrated as following: the fertilizing shaft is driven by a stepper motor, the actual working situation of farming machine is simulated by changing the speed of stepper motor, the fertilizer falling on the tray is sampled by the weighing sensor, the cubic spline interpolation method is used for the sampling data processing, then the relationship charts of flow with timing and flow with distance respectively are finally obtained.An intelligent control system is designed in this study. Two stage computer control is introduced which consists of PC as upper computer and single chip as lower computer. Various parameters are set and final data are processed by the computers. The power system control, data acquisition and transferring is completed by the single chip in the testing process. VB program is used for the upper computer which possesses the high visualization, flexibility and has the friendly operator interface. C51 program is used for the lower single chip and blocking structure design to enhance the reliability and extensibility.After the properties analysis of intelligent control system of fertilizer tester, it has the following characteristics:1) Designed a specific fertilizer tester with intelligent control system to improve the detecting technology of fertilizer facilities.2) The actual working situation of farming machine is simulated by changing the speed of stepper motor and the adaptability of fertilizer feeder for various condition of farmland during different speed can be better reflected through this simulation.3) The actual weight of fertilizer can be gained by sampling the fertilizer falling on the tray with weighing sensor, so the fertilizing effort referring to uniformity and accuracy of the fertilizer feeder can be accurately detected. This method can effectively overcome the defects of the photoelectric method and high-speed photographic method which could only detect the existence of falling breaks and can not accurately acquire the falling condition of fertilizer.