基于PLC的热泵干燥控制系统设计与实现
摘 要
基于工业生产和节能环保的迫切需求，热泵干燥技术因其高效节能、环境友好的特性，在多个行业展现出广泛应用潜力。本研究致力于通过PLC技术实现热泵干燥系统的智能控制，旨在提升干燥效率、降低能耗，并响应工业对自动化、智能化设备的迫切需求。
本研究设计并实现了一种基于PLC的热泵干燥控制系统，选用西门子S7-1200 PLC作为核心控制器，搭配威纶通MT8106IQ触摸屏，对热泵干燥过程中的温湿度进行精确调控。系统还集成了传感器、变频器和热风机等硬件设备。在软件设计上，采用博图编程软件，根据系统控制逻辑和功能需求，开发了手动控制、温湿度自动调节及PID控制等程序流程，并绘制了相应的梯形图。此外，系统具备上位机监控功能，通过触摸屏与PLC通信，实现系统状态的实时监控和参数设定。经过仿真调试和功能验证，该系统表现出高精度、高自动化和节能环保等优点，满足了热泵干燥控制系统的设计要求。
本研究不仅为热泵干燥技术的智能化发展提供了可行方案，也为工业自动化领域中的干燥控制系统设计提供了有益参考，具有重要的实际应用价值和研究意义。未来，该系统有望广泛应用于食品加工、木材加工、制药等多个行业，为工业生产和节能环保做出更大贡献。
关键词：PLC；热泵干燥控制系统；PID控制；博图编程；MT8106IQ
Design and Implementation of Heat Pump Drying Control System Based on PLC
Abstract
Based on the urgent needs of industrial production and energy conservation and environmental protection, the heat pump drying technology has shown a wide application potential in many industries due to its high efficiency, energy-saving and environment-friendly characteristics. This research is committed to realize the intelligent control of the heat pump drying system through PLC technology, aiming to improve the drying efficiency, reduce energy consumption, and respond to the urgent industrial demand for automation and intelligent equipment.
In this study, a PLC-based heat pump drying control system was designed and realized. Siemens S7-1200 PLC was selected as the core controller and matched with MT8106IQ touch screen to accurately regulate the temperature and humidity during heat pump drying. The system also integrates the hardware equipment such as sensor, frequency converter and thermal fan. In the software design, according to the botu programming software, we developed the manual control, temperature and humidity automatic control and PID control, and drew the corresponding trapezoidal diagram. In addition, the system has the function of upper computer monitoring, through the touch screen and PLC communication, real-time monitoring of the system status and parameter setting. After simulation debugging and function verification, the system shows the advantages of high precision, high automation, energy saving and environmental protection, which meets the design requirements of heat pump drying control system.
This study not only provides a feasible scheme for the intelligent development of heat pump drying technology, but also provides a useful reference for the design of drying control system in the field of industrial automation, which has important practical application value and research significance. In the future, the system is expected to be widely used in food processing, wood processing, pharmaceutical and other industries, to make greater contribution to industrial production and energy conservation and environmental protection.
Key words: PLC; heat pump drying control system; PID control; Botu programming; MT8106IQ
目 录
摘 要 I
Abstract II
第1章 绪 论 1
1.1 研究背景与现状 1
1.1.1 研究背景 1
1.1.2 研究现状 1
1.2 研究意义 2
1.3 研究的主要内容 2
1.4 论文工作安排 3
第2章 热泵干燥控制的总体设计 4
2.1 热泵干燥的方案设计 4
2.2 热泵干燥的控制要求 5
2.3 热泵干燥的控制策略 6
2.4 主元器件选型 7
2.4.1 可编程控制器的选型 7
2.4.2 触摸屏选型 8
2.4.3 模拟量模块的选型 8
2.4.4 变频器的选型 9
2.4.5 温度传感器的选型 9
2.4.6 湿度传感器的选型 10
第3章 热泵干燥控制的硬件设计 11
3.1 热泵系统概述与选型 11
3.2 系统的I/O分配设计 12
3.3 电路设计 13
3.3.1 主电路的设计 13
3.3.2 PLC电路的设计 13
第4章 热泵干燥控制的软件设计 15
4.1 系统的功能流程设计 15
4.1.1 手动控制功能流程设计 15
4.1.2 温湿度调节流程设计 15
4.1.3 PID控制流程设计 16
4.2 梯形图的设计 17
4.2.1 手动程序的设计 17
4.2.2 自动程序的设计 18
4.2.3 外部输出程序的设计 20
4.2.4 PID程序的设计 21
第5章 触摸屏界面设计 22
5.1 触摸屏选型与功能概述 22
5.2 触摸屏与PLC的通信设置 22
5.3 监控画面与操作界面设计 23
5.4 系统动画的设计 23
5.5 系统的仿真运行设计 24
第6章 结 论 26
参考文献 27
致 谢 29
