【作者】 尤伟军；

【导师】 谭思云；

【作者基本信息】 武汉理工大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 目前，在国外内工业控制邻域很多地方都会用到温度控制仪，而现在使用的温度控制仪都存在着误差比较大、显示精度较低、功能过于单一、控制算法过于简单等诸多不足，为此设计了一种新型温度控制仪，显得非常重要，其融合了目前国内外使用广泛的嵌入式技术和以太网技术，用以提高系统的各方面性能。该温度控制仪将采集上来的模拟电压信号经过A／D转换，再由CPU进行智能运算，得出相应的输出控制量，再经D／A转换输出一个标准电压信号输出，对底层执行机构进行控制；同时将数据在LCD上进行显示以及通过以太网接口发送到上位机，完成了温度控制仪的智能控制、现场显示和数据高速传输等工作，弥补了现行工业控制领域中温度控制仪的许多不足之处。本文主要是进行新型温度控制仪的研究，共分为几个部分进行全面地阐述：首先，对目前流行的嵌入式技术的发展和应用十分广泛的智能仪表的发展及其背景进行阐述；其次，对系统嵌入式网络化智能仪表——温度控制仪的整体结构及其性能进行比较全面的阐述；第三，对整个温度控制仪的智能控制算法进行比较、选择和设计阐述，在温度控制仪的设计中采用模糊自适应PID算法作为现场控制的智能算法；第四，对温度控制仪的硬件结构进行设计，主要是嵌入式微处理器S3C44BOX的基本外围存储单元、LCD接口、以太网接口、A／D接口、D／A接口等方面的设计与扩展；第五，对温度控制仪进行软件设计，软件设计主要包括两个方面：一是低层驱动程序的设计；二是上层应用程序的设计；第六，主要完成了uClinux操作系统的参数修改、内核配置和系统移植等工作。最后，是对本研究课题的总结和展望，并且说明在本文研究中存在的不足。本文把嵌入式技术和工业以太网技术应用于工业现场智能仪表的研究中，综合了嵌入式微处理器的高速运算能力、模糊自适应PID控制算法的智能控制能力和工业以太网的高速数据传输能力，以满足在现场工业应用过程中，低功耗、快速响应、高精度数据采集等要求。更多还原

【Abstract】 At present, kinds of temperature controllers used at home and abroad have many shortcomings, such as big errors, low demonstration precision, single function, too simple controlled algorithm and so on. So a kind of brand-new temperature controller is designed by using the embedded controlled technology and Ethernet which is widely used in-door and out-door to enhance the various functions of the temperature control system. The temperature control system turns the collected simulated voltage signals into a normal voltage signal through A/D conversions, intelligent operation of CPU, getting relevant outputting control flows and D/A conversions, which controls rock-bottom performing framework. The data is displayed in LCD and transmited to UMB by Ethernet interface. Realizing intelligent controlling, field displaying and high-speed data transmission of temperature controllers is completied, and the shortcomings of current temperature controllers are offset.The dissertation is composed of several parts: Firstly, an simple introduction of the development of the popular embedded system and the intelligent instruments is given; Secondly, an overall explanation of the structure of the intelligent instrumentbased on internet using embedded system——temperature controller is given; thirdly,the intelligent control algorithm of the whole temperature controller is illustrated ,and fuzzy self-adapting PID algorithm is used to control in the design of the temperature controller; fourth, the hardware of the temperature controller is designed, mainly the expansion of the CPU external memory units, LCD interface, Ethernet interface, A/D, D/A interface and so on; fifth, the software of the temperature controller is designed ,it includes two main parts :the design of lower-driven software and the design of upper application software; sixth, an introduction of uClinux operating system which is used in the temperature controller and the revision and transplantation of the system parameters of it is given. Finally, the conclusion and prospect of this subject is given, and the shortage is pointed out in the design.The embedded controlled technology and the new industrial Ethernet are used in the study of intelligent instruments. With integrated application of the high-speed computing capacity of the embedded Microprocessor, the intelligent control capacity of the fuzzy self-adapting PID control algorithm and the high-speed data transmission capacity of industrial Ethernet, such requirements as the low power consumption, high response speed and high accuracy of data collection can be realized in application process of spot industry.更多还原