基于EtherCAT的分布式棉包检验管理系统设计与实现  

Design and implementation of EtherCAT-based distributed cotton bale inspection and management system

作　　者：赵洁[1] 俞方[1] 唐敏峰[1] 杜文辽[2] 

机构地区：[1]上海出入境检验检疫局原材料检测中心,上海200135 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《农业工程学报》2013年第2期207-216,共10页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家质检总局科研项目(编号:2011IK102)

摘　　要：为了提高进出口棉包检验工作的高效性、可靠性和维护简便性,该文研制了基于EtherCAT的分布式棉包检验管理系统,实现了进出口棉花和国棉的入库、出库中的称量、抽样和打标等连续工艺的自动化过程。在单条检验线的控制上采用PLC+变频器+智能马达的方案使系统逻辑简单、条理清晰,同时控制11个变频器和300个普通I/O,满足了在线高效取样的要求。在异地多条检验线的组织和管理上,提出了一种适合监管调度的基于EtherCAT的分布式通信方案,实现了管理层、控制层和设备层的无缝连接与全透明管理。试运行结果表明,棉包检验效率从现有的5包/min提高到40包/min,且系统数据传输分别达到了7.5和15Mbit/s,数据丢失率低,满足工业实时要求,并具备扩展方便的特点,为分布式质检系统的自动化研发提供了应用和技术上的参考。As a real-time industrial Ethernet technology, EtherCAT （Ethernet for control automation technology） has a flexible network topology, which also can be configured easily and transmitted with high speed. Distributed systems can realize the separation between the data acquisition of remote site and the control of local human-machine interface by using the modern network communication technology. It can interconnect the control center of test line and a number of auxiliary equipments via communication network to achieve the purpose of resource sharing and working together. It is also easy to realize decentralized centralized monitoring, control, fault diagnosis and distributed data management. In order to improve the efficiency, reliability and maintenance simplicity of the inspection process for cotton bales import and export, the distributed cotton bale inspection and management system based on EtherCAT was developed in this study, which realized a automatic process of the continuous works as weighing, sampling and marking in the cotton import, export and storage of national cotton. In the control scheme of single inspection line, the PLC ＋ inverter ＋ intelligent motor method is utilized to make system control logic simple and clear, which controls 11 inverters and 300 common IOs at the same time, and met the requirements of efficient sampling （the overall efficiency is 40 bales/min with the sampling rate of 10%）. On the organization and management of off-site and multiple lines, we proposes a distributed communication scheme suitable for regulating and scheduling based on EtherCAT, which achieves transparent management and seamless connection with control layer, device layer and management layer. In the EtherCAT-based distributed applications, the control object includes the Ethernet devices of factory enterprises, factories, process, and field level. Specific devices contain the EtherCAT local rack, EtherCAT remote I/O sub-station, the EtherCAT distributed I/O device, ConneXium extended and managed s

关 键 词：检验 管理 设计 棉包取样 ETHERCAT 分布式系统 RFID 

分 类 号：TP278[自动化与计算机技术—检测技术与自动化装置]