Hardware Design Of Verification Platform For Distributed Data Acquisition System Based On Loongson Processor

Distributed data acquisition system is widely used in China's power system,industrial control,national defense construction,marine exploration,seismic monitoring and other fields.The system is mainly composed of CPU,FPGA,PHY,ADC and other components.At present,most of them are designed by using imported chips.In recent years,the "trade war" initiated by the United States and the embargo have greatly restricted the import of chips,which has seriously affected the application of distributed data acquisition systems in some important areas of our country,and made the distributed data acquisition system which designed by imported chips to be exposed to risk.Therefore,there is an urgent need to develop a localized distributed data acquisition system with independent intellectual property rights.To this end,this thesis researched and developed a distributed data acquisition system verification platform based on Loongson Processor.The system takes the Loongson 1B processor as the core,completes sampling and gain control of multiple analog signals,and encapsulates the sampled data and transmits it based on Ethernet.The system is realized by 100%domestically produced components,and the selected components have high maturity and wide application in the market.Among them,the Loongson 1B processor is used as the core processor of the service to complete the parsing and processing of the received commands,and the packetization and transmission of the collected data;Shenzhen Guowei FPGA implements the cascading of each node based on the dual-port Ethernet switching function,sampling and gain control of multiple analog signals;PHY chip completes the encoding and decoding of the network packet.In addition,this thesis completed the board-level debugging and functional performance testing of the verification platform.Firstly,the quality of the power and clock signals of each node was tested,and then the data collection results were analyzed.Finally,the transmission bandwidth and network switching function tests were carried out to verify the technical indicators and functions of the system.