基于AT89C52单片机的锅炉过热蒸汽温度监控系统 毕业设计.doc

摘 要 过热蒸汽温度作为工业锅炉运行中的一项重要参数，反映出设备运行的经济性和安全性，锅炉过热蒸汽温度过高或过低，都将给安全生产带来不利影响，必须严格地将温度控制在给定值附近。锅炉过热蒸汽温度被控对象是一个多容环节，具有大延迟、大惯性以及时变性等特性，干扰因素多，属于可控性比较差的一个调节对象。 针对锅炉过热蒸汽温度的上述特点，本文在分析了锅炉过热蒸汽温度的调节任务，温度调节对象的静、动态特性，控制难点和设计原则的基础上，充分利用模糊PID控制的动态特性好和PI调节能消除静态偏差的特性，通过调整模糊PID控制器的控制规则，改善了控制系统的系能。 本文设计了一种基于AT89C52单片机的锅炉过热蒸汽温度监控系统,这种方案可大大提高锅炉工作效率和控制精度，使锅炉过热蒸汽温度按实际生产稳定在一定范围，提高锅炉工作的安全性，有助于自动化水平的提高。并且利用单片机实现温度监控，具有成本低廉、可靠性高、结构简单等特点。 关键词：过热蒸汽； 温度； 模糊PID控制； 单片机 ABSTACT Superheated steam temperature is an important parameter in the operate course of the industry boiler, it reflects the security and efficiency of the equipment operate. The boiler superheated steam temperature is excessively high or excessively low, will all bring disadvantage effect to the safe production, so we must control the temperature in the round of initialization. The boiler superheated steam temperature object is a mini-container element, it has a big delay characteristic and a variety model with variety time characteristic, it also has many disturbances, it belongs to a more difficult adjust object. According to the above features of boiler superheated steam temperate, this dissertation studied the application of Fuzzy-PI composite serial control in the boiler temperature system of boiler by the fully use of both the good dynamic characteristics of fuzzy PID control and eliminating static deviation of PI control on the base of analysis to the adjust mission of the boiler temperature , the static characteristics and the dynamic characteristics of the boiler temperature object, the difficulty to control it and its design principle. Then control rules of the fuzzy PID controller were adjusted, so it improves the performance of control system. This paper introduces a design based on the boiler AT89C52 SCM temperature monitoring system, this project can greatly improve the efficiency and accuracy, the boiler superheated steam temperature stables in certain scope accord to actual production, it also can improve th