【作者】 韩鹏飞；

【导师】 戴胜华；

【作者基本信息】 北京交通大学 ， 交通信息工程及控制， 2008， 硕士

【摘要】 本文针对微机监测系统中移频采集机功能的实现和微机监测相关技术进行了研究。在嵌入式硬件平台上综合运用数字信号处理知识,根据相位连续的移频信号的特点,设计了监测算法,并编写软件程序实现了对移频信息的监测功能。使用ZP-89移频发送盒发送信号,对监测系统进行了测试。完成了微机监测通信系统的设计,包括基于RS-485总线的Modbus通信和CAN总线通信两部分。本文选用智能采集器,搭建Modbus网络,实现了对道岔表示电压、轨道电压、相位角等信息的监测;修订了微机监测系统通信协议,在此基础上编写了系统的CAN总线通信程序,并实现了与站机的联调,在实现室和现场对通信系统进行了反复测试。在ARM平台上重新编写了轨道采集机、区间采集机软件程序,实现了两部分的监测功能,实现了微机监测系统的升级换代。针对原系统的不足,设计了补偿办法,并通过软件实现;在嵌入式平台上移植了μC/OS-Ⅱ操作系统,替代原有的单片机前后台模式。改进后的微机监测系统,在实验室和铁路现场进行了测试,运行稳定,传统监测功能在性能方面得到了提高,新功能能够正常完成监测任务。在结论中总结了本论文的主要工作内容,并指出了不足之处和进一步的工作的方向。更多还原

【Abstract】 This thesis makes a research on the frequency-shift acquisition and technologies about microcomputer monitoring.Using the digital processing knowledge, this paper presents the monitoring algorithm according to the characteristics of continuous phased frequency shift signal and develops the function of monitoring the frequency-shift information.In this paper, the communication system has been designed, which includes the Modbus communication based on RS-485 and the CAN bus communication two parts.This thesis applies the intelligent collector through the Modbus net to carries out the inspection of information such as the switch voltage, the track voltage and the phase angle. The communication protocol of the monitoring system is emended, and CAN program is coded based on this protocol for the communication between the acquisition and the station computer. The programs have been put into practice already.The paper programs all the codes of the track acquisition and the section acquisition and implements their function based on the ARM platform. TheμC/OS- II operating system is used on the embedded platform in place of the for-and-background model on single chip platform.The improved computer monitoring system works well in testing both in the laboratory and the railway station. The traditional functions are improved, and the new functions operate well.The paper concludes the main job in the last part, and introduces the improvement rooms in the continued work.更多还原