| 光纤CAN总线集线器及其组网研究 |
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| 引用本文： | 魏丰,潘小虎,曾勇,丁洪林.光纤CAN总线集线器及其组网研究[J].仪器仪表学报,2011,32(12). |
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| 作者姓名： | 魏丰 潘小虎 曾勇 丁洪林 |
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| 作者单位： | 1. 华中科技大学控制科学与工程系 武汉430074
2. 中航工业第一飞机设计研究院 西安710089 |
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| 摘 要： | 目前国际上还没有以光纤为传输介质的CAN总线物理层标准.提出了一种以光纤为传输介质的CAN总线集线器和基于该集线器的组网方法(已申请专利).在总结了双绞线介质CAN总线物理层3个特点的基础上,详细讨论了该集线器的工作原理和设计方法.集线器采用了可编程逻辑器件的逻辑“与”替代双绞线CAN的“线与”,并将“与”后的信号回传实现了所有节点对总线状态的监听功能,确保了所构造的光纤CAN总线网络在物理层之上与现有的CAN总线标准完全兼容.还介绍了光纤CAN总线集线器的级联扩展方法和与双绞线CAN总线子网的连接方法.实际设计了一个八口的集线器,初步的通信测试验证了方案的正确性和实用性.研究的结果对CAN总线新标准的提出有非常积极的意义.
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| 关 键 词： | 控制器局部网 现场总线 光纤通信 集线器 |
Study on a fiber-optic CAN hub and its networking |
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| Wei Feng,Pan Xiaohu,Zeng Yong,Ding Honglin.Study on a fiber-optic CAN hub and its networking[J].Chinese Journal of Scientific Instrument,2011,32(12). |
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| Authors: | Wei Feng Pan Xiaohu Zeng Yong Ding Honglin |
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| Affiliation: | Wei Feng1,Pan Xiaohu1,Zeng Yong1,Ding Honglin2(1 Dept.of Control Science and Engineering,Huazhong University of Science & Technology,Wuhan 430074,China,2 The First Aircraft Institute of AVIC,Xi'an 710089,China) |
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| Abstract: | At present,no standard is defined for the fiber-optical transmissions of CAN signals.A fiber-optic CAN hub and the scheme of constructing CAN network based on the hub(patent pending) are proposed in this paper.After a summarization of the three features of the physical layer of twisted-pair CAN bus,the working principle and the design method of the hub are discussed in detail.Through replacing the Wire-AND in twisted-pair CAN with CPLD AND logic and enabling the bus monitoring function of the nodes by sendi... |
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| Keywords: | CAN(control area network) field bus fiber-optic communication hub |
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