【作者】 白延敏；

【导师】 马维华；

【作者基本信息】 南京航空航天大学 ， 计算机应用技术， 2008， 硕士

【摘要】 煤矿电力保护系统是井下供电系统安全、连续运行的保障,同时它能够将井下现场设备的状态和数据可靠、实时地传送到地面调度监控室,便于工作人员及时了解与查询现场安全监测监控信息。综合保护器是煤矿电力保护系统的重要组成部分,经过几十年的发展,保护器的种类多样,其通信物理接口和通信协议各不统一,目前比较常用的是RS-485和CAN总线接口,但都无法实现较远距离通信,所以如何将保护器与以太网结合是本文研究的一个重点。本文对电力保护系统的研究与实现主要包括两个部分:1)针对GZB-ARM-9110型综合保护器存在的电参量采样、液晶显示等问题进行研究和改进,完成升级版GZB-ARM-9111型综合保护器的开发;2)在不改变原有网络结构的情况下,将RS-485和CAN总线控制系统改造为以太网分布式控制系统,针对矿井生产环境和通信特点设计一种嵌入式协议转换器,解决RS485-Ethernet和CAN-Ethernet的连接问题。本文对协议转换器的开发主要采用嵌入式系统的设计方法,即软硬件协同设计的方法,软件硬件设计紧密结合、相互协调。分析系统功能需求,给出软硬件设计方案。硬件上以LPC2292作为中央处理器,外接以太网控制芯片RTL8019AS、CAN收发器TJA1050等;软件平台采用嵌入式操作系统μC/OS-II,裁减TCP/IP协议栈,开发CAN、以太网驱动程序,完成RTOS任务设计,实现协议间的相互转换。经测试验证,本系统满足了煤矿电力保护的要求,完成了信息从设备层到管理层的集成。更多还原

【Abstract】 Colliery electric power protection system ensures that power operates safely and continuously in the mine, also it can transmit the state and data of devices in the mine to control center on the ground reliably and duly. It is convenient for workers gaining and checking field information.Integrated protector is an important part of the colliery electric power protection system. With development for decades, protectors have many types, dissimilar performance and communication physical interfaces. At present, RS-485 and CAN bus interfaces are more popular, but they do not communicate data for long distance.The paper mainly includes two parts for research and implementation of electric power protection system: 1) Research and amelioration GZB-ARM-9110 integrated protector about its problems on power parameter sampling, LCD display and so on. GZB-ARM-9111 integrated protector is implemented. 2) Transform field bus control system to distributed control system based on Ethernet without changing the original network architecture. Considered the feature of mine environment and communications, an embedded protocol converter has developed to resolve the connection of RS485-Ethernet and CAN-Ethernet.In this paper, embedded system design method is adopted in protocol converter’s development, which is also named software/hardware co-design to design closely together and in phase. By analyzing functional needs, software/hardware design project has brought forward. On hardware design, converter is adopted LPC2292 as central processing unit. LPC2292 connects with Ethernet controller RTL8019AS, CAN transceiver TJA1050 and so on. Software platform adopts embedded operating systemμC/OS-II. Software design includes reducing TCP/IP protocol, developing drivers of CAN and Ethernet, and designing RTOS tasks.Certified, this system can meet the need of colliery electric power protection, and accomplishes information integration from device layer to management layer.更多还原