测控模块的设计及网络化过程控制实验平台的构建

【作者】 翁永生；

【导师】 王海梅；

【作者基本信息】 南京理工大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 随着科学技术的进步，测控系统已经向智能化、网络化方向发展。为了将最新技术成果引入高校课程教学，论文设计了一款具有数据采集、处理、控制、通信功能的智能测控模块，并在此基础上，构建了一套网络化过程控制系统实验平台。论文首先阐述了测控模块的硬件设计方案，对该模块的人机交互电路、数据采集电路、通信接口电路、电源电路的设计进行了详细的分析。模块的MCU选择的是美国Ti公司的MSP430F149单片机。硬件设计调试完成后，利用IAR Embedded Workbench 3.41A软件开发了测控模块的控制程序。软件设计采用了模块化的设计思想，由整体到局部，化繁为简，大大提高了程序的开发效率。在测控模块设计完成的基础上，构建了面向水箱液位对象的网络化过程控制系统实验平台。在平台构建过程中：制定了RS485多机通信协议，对如何提高RS485网络通信的可靠性进行了分析；利用VC++6.0编写了具有串口通信、数据存储、实时曲线绘制等功能的上位机监控程序；对过程控制算法及参数的选择进行了分析。最后，对整个系统平台进行了运行及调试，实验证明：模块设计方案正确，性能可靠，构建的实验平台能够满足综合型、设计型以及网络化的实验要求。更多还原

【Abstract】 With the progress of science and technology, observation and control system hasdeveloped in the intelligent and networked direction. In order to introduce the latesttechnological achievement into university’s course teaching, an intelligent observationand control module with the function of data collecting、processing、communication、and control has been designed in this subject. Based on the desinged module, a networkedprocess control experimental platform has been constructed.The paper fristly introduces the hardware design of the module.In this part,theinteraction circuit between human and machine、data collecting circuit, communicationinterface circurt、and power circuit have beed analysed in detail.The master controller forthe module is MSP430F149 single chip which is produced by Ti Company in America.After finishing the hardware design of the observation and control module,I havedeveloped the control program for the module using the software of IAR EmbeddedWorkbench 3.41.A.The software design adopts modularization design idea which makethe software development more efficient.After the module has been designed successfully,a suit of networked process controlexperimental platform has been constructed.The water level of the tank is the controlledtarget in the system. In the course of structuring the plafform,a protocol for thecommunication based on RS485 bus has been established.And then introduce somemethod to raise the RS485 network’s dependability of communication and write theprogram with the function of serial data commnication、data storage and real time curvedrawing for the PC utilizing VC++6.0.After that, the paper analyses the controlarithmetic for the process control system.In the end, the system has been debugged. It is proved that the module’s design issuccessful,the module’s performance is reliable,and the platform constructed can meetthe need of integrated、opened and networked experiment.更多还原