【作者】 张捷；

【导师】 黄一；

【作者基本信息】 大连理工大学 ， 船舶与海洋结构物设计制造， 2007， 硕士

【摘要】 外加电流阴极保护是地下或水下等电解质环境中金属构筑物电化学腐蚀防止或延缓的重要技术措施之一。外加直流电源是实现外加电流阴极保护措施的关键。本文采用计算机控制技术和虚拟仪器技术，开发设计了具有性能优良、成本低廉、操作简单、智能化、网络化、适于远程集中控制的阴极保护电源测控系统。论文主要研究内容包括：(1)分析了衡量保护效果的重要指标：电源的输出电压、输出电流、参比电位、被保护体两个关键点的电位。在此基础上选择适合采集这些指标的传感器作为测控系统硬件的一部分。(2)设计合理经济的电源硬件电路，包括原始方案和易于实现的替代方案。(3)比较了虚拟仪器相对于传统仪器的优势，将计算机控制技术、虚拟仪器技术和数据库技术等有机结合，开发了电源测控系统的管理软件。设计了数据传输模块，用来实现电源系统参数的实时采集以及对硬件电路中执行机构的自动控制。(4)实现测控系统软件基本功能模块，提供各参数设置界面，包括间隔设置、目标值设置，算法系数设置和报警参数设置等。使用阴极保护的专家知识库作为参考，实现电源系统参数的即时设定，更有效地对电源进行自动监控。(5)结合数据库技术，将LabVIEW与Microsoft Access数据库相连接，实现了强大的数据管理功能，在数据库中建立历史数据和目标值库表以及专家知识库表等，实现对数据库记录的添加、检索、删除等功能。(6)实现网络化远程界面控制，利用LabVIEW的Web Publishing工具将测控系统界面发布在Web页面上，使得远程客户端可以通过浏览器实现对现场保护系统的监测和控制，实现真正意义上的虚拟仪器。更多还原

【Abstract】 Impressed Current Cathodic Protection (ICCP) is one of the most important methods to delay and prevent electrochemical corrosion of the underground or underwater metal structures. The impressed DC power supply is an important part of impressed current cathodic protection. Based on virtual instrument technique and computer control technique, the paper develops an intelligentizing and networking control system of cathodic protection power supply, which is suitable for long-distance centralized control and easy to operation and lower cost and excellent capability.The main research content of the dissertation involves:(1) The paper analyzes output voltage, output current, the protected structure potential measured by dint of reference electrode as well as the potential of the two key points in the protected structure, all of which are indexes to measure the protection effects. The appropriate sensor which is one part of the system hardware is chosen.(2) The reasonable and economical power supply circuit is designed, including the primitive scheme and the easy-realized alternative scheme.(3) The paper analyzes the advantage of virtual instruments compared with traditional instruments. Combining computer control technique and database technique with virtual instrument technique, the paper develops a software to manage the monitor system of cathodic protection power supply. Meanwhile, data transmission module is designed to real-time collect the parameters of the power system as well as control the executive mechanism of the circuit.(4) The paper discussed how to design the basic function module, which provides the parameters setting interface to set the collecting interval, objective value, the coefficient of the algorithm and alarm parameter, etc. Referred with the cathodic protection knowledge base, the parameters of the system can be real-time set so that the power can be automatic monitored effectively.(5) The paper utilizes Microsoft Access as database to manage the data in the LabVIEW. There are two classes of tables in the database: history data and objective value tables and the knowledge base table. The data in the database can be added, searched and deleted. (6) Also, the system can be controlled in long distance. With the Web Publishing tool of LabVIEW, the system can be published in the web so that remote client can monitor and control the system through browser. This is the true virtual instruments actually.更多还原