基于CAN总线的煤矿广播系统的研究

发布时间：2018-06-14 08:09

本文选题：矿用广播 + CAN总线　；参考：《西安科技大学》2015年硕士论文

【摘要】：我国煤矿安全形势虽已日趋好转,但由于矿井的特殊工作条件及性质致使井下事故仍屡有发生,严重威胁着工作人员的人身安全,因此建立完善的通信联络系统加强井上与井下的交流对提高煤矿的信息化建设与安全生产起着关键作用。煤矿广播系统作为重要的通信系统之一,其研究有着重要的意义。本文在分析公共广播系统特点的基础上,对现有煤矿广播系统的地址容量、时效性和传输距离存在的问题进行研究,根据多技术对比论证结果,提出了在IP广播的基础上建立以工业以太网为主干,CAN总线作为延伸的煤矿广播系统。该系统主要由上位机监控中心、中间层网关数据分站和井下广播终端组成。采用工控PC机作为上位机人机交互界面开发的平台;以网关转换器来解决以太网和CAN的转换问题;选用S3C2440作为井下终端核心控制器,并详述了广播终端的硬件设计,包括其外围电路、CAN总线模块、音频接口电路等。在软件方面,完成了上位机监控站和网关节点的设计,并针对终端硬件平台,移植LINUX操作系统在ARM中,进行了CAN模块和音频模块的设计。同时针对煤矿广播系统中传输数据种类多、特性不一的特点,在分析其在CAN总线控制网络传输中存在死锁、关键性消息不能得到保证等弊端后,提出了一种混合调度算法以保证数据传输的实时性和可靠性。经验证,试验结果与理论分析一致。基于CAN总线的煤矿广播系统的研究,可以完成大范围扩音,较好的实现了各项设计目标,能够有效提高煤矿的信息交流与安全生产管理,具有良好的应用前景。
[Abstract]:Although the situation of coal mine safety in our country has been improving day by day, due to the special working conditions and nature of the mine, accidents still occur frequently, which seriously threaten the personal safety of the workers. Therefore, the establishment of a perfect communication system plays a key role in improving the information construction and safe production of coal mines. As one of the important communication systems, the study of coal mine broadcasting system is of great significance. Based on the analysis of the characteristics of the public broadcasting system, this paper studies the problems of address capacity, timeliness and transmission distance of the existing coal mine broadcasting system. Based on IP broadcasting, a coal mine broadcasting system with industrial Ethernet as main trunk and can bus as extension is proposed. The system is mainly composed of upper computer monitoring center, intermediate gateway data sub-station and downhole broadcasting terminal. Industrial control PC is used as the platform of man-machine interface development, gateway converter is used to solve the conversion problem between Ethernet and can, S3C2440 is selected as the core controller of downhole terminal, and the hardware design of broadcasting terminal is described in detail. Including its peripheral circuit can bus module, audio interface circuit and so on. In the aspect of software, the design of monitor station and gateway node is completed, and the can module and audio module are designed by transplanting Linux operating system in arm for the terminal hardware platform. At the same time, aiming at the characteristics of many kinds of data and different characteristics in the broadcast system of coal mine, after analyzing the disadvantages of deadlock in the can bus control network transmission, the key message can not be guaranteed, and so on. A hybrid scheduling algorithm is proposed to ensure the real-time and reliability of data transmission. It is verified that the experimental results are consistent with the theoretical analysis. The research of the coal mine broadcasting system based on can bus can complete a wide range of sound amplifiers, achieve the design goals well, can effectively improve the information exchange and safety production management of coal mines, and have a good application prospect.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD65;TP273

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