| 基于EtherCAT的分布式棉包检验管理系统设计与实现 |
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| 引用本文： | 赵 洁,俞 方,唐敏峰,杜文辽.基于EtherCAT的分布式棉包检验管理系统设计与实现[J].农业工程学报,2013,29(2):207-216. |
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| 作者姓名： | 赵 洁 俞 方 唐敏峰 杜文辽 |
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| 作者单位： | 1.上海出入境检验检疫局原材料检测中心，上海 200135;1.上海出入境检验检疫局原材料检测中心，上海 200135;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 |
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| 基金项目： | 国家质检总局科研项目（编号：2011IK102） |
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| 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。
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| 关 键 词： | 检验 管理 设计 棉包取样 EtherCAT 分布式系统 RFID |
| 收稿时间： | 2012/6/26 0:00:00 |
| 修稿时间： | 2012/12/22 0:00:00 |
Design and implementation of EtherCAT-based distributed cotton bale inspection and management system |
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| Zhao Jie,Yu Fang,Tang Minfeng and Du Wenliao.Design and implementation of EtherCAT-based distributed cotton bale inspection and management system[J].Transactions of the Chinese Society of Agricultural Engineering,2013,29(2):207-216. |
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| Authors: | Zhao Jie Yu Fang Tang Minfeng and Du Wenliao |
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| Institution: | 1.Shanghai Entry-Exit Inspection and Quarantine Bureau,Shanghai 200135,China;2.School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China) |
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| Abstract: | Abstract: 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 switch, which can be pre-configured for using as a dual-loop switch. Hot standby configuration can be used with configuring the remote I/O, distributed I/O device or the third-party devices of distributed I/O devices. Through the daisy chain loop architecture of communication module, the entire system can achieve the performance of automatic network recovery and uncertainty remote I/O less than 50 ms. It has connected single control equipment to the whole EDCB-IMS (EtherCAT-based distributed cotton bale inspection and management system) for having the transparent access and control of businesses, factories, process and field equipments. The EDCB-IMS system has a design of the pipeline running mode, which makes the cotton mechanical devices automatically sample, analyze the sampling cotton bale, weigh and print barcode. According the operating frequency of each module, the system will arrange the work time of each step, such as separating the sampling bales with the other bales, analyzing the sample, passing through the RFID (radio frequency identification) system, weighing, and data management of sampling data. The experimental results show that it has greatly enhanced cotton bales inspecting efficiency from 5 bags/min to 40 bags/min. The data transmission speeds are 7.5Mbps (Modbus on EtherCAT) and 15 Mbps (CIP on EtherCAT) respectively and with low data loss. It provides a good real-time performance and is easy to do extensions, which can be a good reference for the automation research on application and technology of distributed quality-test system. |
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| Keywords: | inspection management design cotton sampling EtherCAT distributed systems RFID |
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