1、毕业设计（论文） I 水位检测系统的控制水位检测系统的控制电路电路 工 学 部 专 业 自动化 班 级 学 号 姓 名 指导教师 负责教师 毕业设计（论文） II 摘摘 要要 水位检测在日常生活及工业领域中应用相当广泛，比如江河湖海、水箱、水塔、 地下水、水电站、自助售水、江河湖海等都需要进行水位检测来了解水位的变化情 况。目前水位检测系统在国内外已经有了较为广泛的应用。水位检测是水位数据采 集、存储、传输、处理等技术的集成，水位检测有许多方法，如人工检测，传感器 检测等。本水位检测系统的工作原理是通过水位的变化导通或断开电路，实现导通 或切断系统电源而实现警报指示的工作与停止。系统控制电路有
2、多种形式，本次设 计通过三极管的导通与否来控制电路的开闭，影响发光二极管的发光，从而起到视 觉及听觉指示作用。同时将实际水位信号引入可编程控制器 PLC 中，通过 PLC 的通 讯口与组态软件相连，在软件中通过信号模拟出实际的水位，从而更加清晰的了解 到水位情况。 关键字：检测；系统；控制；水位；电路 毕业设计（论文） III Abstract Water level detection is widely used in our usual life and many industry fields, such as rivers or lakes, water tank， water to
3、wer, groundwater, hydropower station, selling water by self. The situations need water level detection to know the changes of water level. In these days, water level detection system has been widely used at home and abroad. Water level detection is the sum of the data cellection, saving, transmissio
4、n and dealing , which has many methods, such as manual detection, sensor detection and so on. The water level detection system works through the changes in water level on-or off circuit to realize connection or breaking of power, controying the warning system in working or not. The system controls the electric way in many forms. System control circuits take many forms, the transistor, designed by the on-circuit or to control the opening and closing, the impact of the LED light-emittin
