Embedded Intelligent Network Gathering Station Development And Applied Research

This paper starts on the actualities of Data Acquisition System, fully considering the application present in the on-line Monitoring cite and the users' suggestions, according to the development of embedded ARM technology currently, and presents the whole frame of designing intelligent networked Data Acquisition System with embedded ARM technology. In this dissertation, the main contents are: (1) the establishment of the necessary environment for designing embedded Data Acquisition System; (2) the type selection of the IC chip using in the Data Acquisition System, and the design and implementation of the hardware platform including schematic diagram and PCB drawing (3)the establishment of the embedded software platform, including the transplantation of embedded operating system and the coding of device driver and application program;(4) the embedded data-base Sqlite is transplanted into the system and the local storage of acquisition data is realized; (6) the tests of the software function at both the reference platform and the actual platform are completed.The hardware platform of the intelligent networked Data Acquisition System is designed and developed with the ARM chip AT91RM9200, the high-speed and simultaneous A/D converter ADS8364, the display interface chip SSD1906, the programmable logic device CPLD, Ethernet transceiver, Ethernet controller chips and other chips. Varieties of high-speed synchronous signal acquisition are achieved by a data acquisition system. The design of hardware platform, the transform circuit of front-end analog variables, the man-machine interface circuit and the CPLD logical control circuit are designed based on AT91RM9200. In the design of software, the embedded ARM Linux, the root file system, the embedded database Sqlite and the embedded web BOA are transplanted into the hardware platform, so the web function is realized. And the programs of device drivers and application are coded in response to the practicable requirements. So both the hardware design and the software development of the embedded system based on ARM processor and ARM Linux are completed eventually.The networked Data Acquisition System having functions such as the local-storage of data, man-machine interface and web etc. and reducing the size at the same time, is much more suitable for cite installation. Therefore, it has great practical significance to the condition evaluation of on-line monitoring system and the application and popularize of fault diagnosis system.