Design Of Monitoring Data Transmission And Control System For Power Cable Channel

Embedded systems have been universal to the industrial control, traffic control, information appliance and environmental monitoring, and network is the future development trend of embedded systems. An embedded network-based monitoring system for power cable channel is designed in this paper. This system is based on CAN field bus and embedded Ethernet technology to realize real-time transmission, monitoring, status dispiay and critical alarm, therefor, the sysytem can reduce cable channel accident rate, save costs and improve the quality of power supply.Embedded host-computer is a core component of this monitoring system, its key function is to receive data collected by embedded client- computer and to process these data, then transmit them to information management level through Ethernet.After a detailed analysis about the functional requirements of embedded host-computer, this paper first design the architecture. Then the hardware circuit is designed with the microprocessor LPC2292 based on ARM7TDMI, including minimum system for LPC2292, CAN bus interface circuit , Ethernet interface circuit and Romdisk interface circuit. The key algorithm ofμC/OS-II, which is an embedded real-time operating system, is also studied in depth. After transplantingμC/OS-II to LPC2292 successfully, the system control software is completed, including CAN communication receiver subroutine, driver for network card RTL8019AS, communication program for TCP/IP Application Layer and driver for NANDFLASH K9F2G08U0M.