基于PLC及触摸屏的隧道通风系统的设计

根据公路隧道的特点，提出了一种基于PLC及触摸屏技术的隧道通风控制系统的设计。将PLC、触摸屏、变频器三者有效结合，利用传感器在实时检测隧道内环境的基础上，通过PLC控制变频器驱动隧道内风机的运行，优化隧道内空气质量的同时也节约了能源。触摸屏的引入能够实现对系统工作全程的实时自动监控，最后利用计算机模拟技术实现了对该控制系统的整体模拟和调试。实验证明，该系统运行顺畅，性能可靠，人机交互界面友好，自动化水平有效提高，具有良好的市场前景及应用价值。

Design of tunnel ventilation system based on the PLC and touch screen

Based on the characteristics of highway tunnel, the design of tunnel ventilation system was proposed. The system combined PLC with the frequency converter and touch screen. Using the sensor in the real time detection of traffic environment, through the PLC controlling frequency converter to drive tunnel fan, the air indicators conformed to the safety standards and at the same time saved energy. The introduction of touch screen could realize real time automatic monitoring of the whole system. At last, the whole simulation and debugging of the control system was realized by computer simulation technology. Experiments proved that the system ran smoothly and had reliable performance, friendly man machine interface, high level of automation, and the good market prospect and application value.