The Research Of Frequency-shift Acquisition And Microcomputer Monitoring Technology

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.