【作者】 郭凤华；

【导师】 汪献忠；

【作者基本信息】 郑州大学 ， 测试计量技术及仪器， 2010， 硕士

【摘要】 随着现代电力工业日益发展,大容量发电机组已经成为电力工业的支柱。作为锅炉水质监督的重要监测参数,磷酸根的快速、准确、实时地监测对保证系统的安全经济运行有着重要的意义。论文简要的分析了在线磷酸根分析仪设计应用的背景意义以及磷酸根测量的主要方法。分析了磷酸根离子测量过程中的各种影响因素,将卡尔曼滤波用于分光光度法测量炉水磷酸根离子含量。并且根据采用磷钒钼黄分光光度法测量炉水磷酸根离子含量的方法,确立了系统的整体硬件和软件设计。系统采用高速、低功耗工业级AT91M40800单片机做核心处理器来控制系统的运行,用可编程控制器件CPLD来控制通道和柱塞泵以及电机的工作,并且移植了嵌入式操作系统来保证系统长期在线运行的稳定性。通过试验数据具体分析了运行效果。经过试验与调试表明,该分析仪可实时在线监测被测水质磷酸根离子含量,自动测量数据、存储数据,并可通过4-20mA标准电流和RS-485通信对数据进行远传,实现对现场仪表运行情况的远程监测。更多还原

【Abstract】 With the development of modern electric power industry, the large-capacity power generating units has become a pillar industry. As one of the main monitored parameters of the boiler water quality in the thermal power plant, the fast, accurate, real-time monitoring of phosphate content has great meaning to ensure safe operation of the electric power industry.This paper has brief introduced the background of Phosphate Analyzer application and the main methods of phosphate content measurement, has discussed the influencing factors which might be influence the measuring results, and use Kalman filtering method to measuring phosphate ions content by Spectrophotometry. And in this paper, the overall system hardware and software design has been finished in foundation of Phosphorus vanadium molybdenum yellow Spectrophotometry.The system uses the high-speed, low-power consumption, industrial grade single chip microcomputer AT91M40800 as the core processor to control the whole system operation, uses the programmable logic device CPLD to control the channel switch and piston pumps and motor’s work. However, the system has transplanted the embedded operating system to ensure its long time, online, stable running. The paper also confirmed the satisfactory operating results by the experiment data.Infer to the testing and debugging results, the analyzer can monitor phosphate ion content of water quality real-time and online, can auto measuring data, store data, and remote transfer data through 4～20mA standard current and RS～485 communications to support remote monitoring of on-site Instrument operation.更多还原