"基于PLC技术的自动灌溉控制系统设计研究"

Abstract Water is essential for sustaining life. However, the irrational use of water resources in today's society has led to significant waste. In certain regions of China, such as Gansu and Shaanxi, water scarcity has become a pressing issue, impacting daily water supply for individuals. It is imperative for society to find more efficient ways of utilizing water resources. The majority of water waste occurs in agricultural irrigation, primarily due to the use of flood irrigation methods, which not only waste water resources but also increase labor effort. Therefore, this study focuses on the design of an automatic irrigation system using a PLC control system. This research begins by analyzing the structure and working principles of the automatic irrigation system in order to determine the control requirements. Subsequently, the study proceeds with hardware and software design. The hardware design phase primarily includes PLC selection, I/O allocation tables, and I/O external wiring diagrams. The software design phase encompasses the design of control flowcharts and ladder logic program design. By adopting PLC technology as the core control component, this system achieves smaller size, enhanced functionalities, simpler programming, higher reliability, and increased control flexibility. Keywords: Automatic irrigation device; PLC control system; Hardware design; Software design.