【作者】 刘莹；

【导师】 王保保； 张晓燕；

【作者基本信息】 西安电子科技大学 ， 计算机技术， 2010， 硕士

【摘要】 我从实际楼宇中央空调自控需要和客户需求出发,结合以往大量现场工程实践经验,设计了本系统。我从前期的市场调研、客户需求确认、施工方案规划,到中期的控制方案设计、设备选型、程序编写,再到后期的项目现场调试,整体验收,整个过程全程参与并组织相关人员共同完成,项目验收后现场使用达到客户预期效果。整个系统采用模块化设计,CPU主模块是采用CPULM3108及模拟量扩展模块,可根据需要灵活配置各模件数量。通过软件设计完成中央空调所需的参数设置和控制要求,系统软件由主程序、初始化程序、模拟量检测程序组成,通过调用子程序来完成系统的数据采集、模拟量检测等功能。进行中央空调系统自动化控制和节能设计,根据交流电动机变频调速的特点和节能原理,把PID算法在变频调速系统中,介绍用和利时公司小型一体化PLC产品LM系列PLC控制中央空调的实例,对系统的主回路和控制回路的硬件部分进行了更改。本文主要是对空调出口温度进行检测,采用变频器调节中央空调的转速,使其高效运行,达到节能的目的。更多还原

【Abstract】 I design the system, sewage actual needs and customer demands, combining with previous large field engineering experiences. From the earlier market research, customer demands confirmation, and program planning, design the medium-term controlling scheme, equipment selection, programming, After the whole project commissioning acceptance, the whole process of full participation and organize the relevant personnel to be completed. Project acceptance meets customer’s expectation.The whole system uses the modular design, the CPU module uses CPULM3108, the simulation quantity expansion module uses mojules, may according to need to dispose various modules quantity nimbly. Completes the parameter establishment and the control request through the software design which the central air conditioning needs. The system software consists of the master routine, the initialization routine and the analog quantity examination procedure. Through calling the subroutine, the system completes the data acquisition, the examine of analog quantity and the functions of audible and visual alarm.This paper explained some basic ideas and methods that the systematic automation on the automation control and energy-conservation of central air conditioner and recommended the characteristic and energy-conserving principle of alternator. It also recommended HOLLIAS LM main functional module and application and the application of PID algorithm. The paper made a detailed instruction to the main circuit and the hardware of control circuit. This subject detected the export temperature of air conditioner, adopt the frequency converter to regulate the rotational speed, and make it run high-efficiently and achieve the goal of energy-conserving.更多还原