Hardware Development Of Synchronous Data Aggregation Platform Based On LVDS

Distributed acquisition systems are widely used in major engineering fields such as marine resource exploration and marine security.In recent years,with the continuous expansion of the scale of distributed acquisition systems,higher requirements have been put forward for sampling frequency,transmission distance and data bandwidth.LVDS(Low Voltage Differential Signaling)transmission technology has the advantages of high bandwidth,long transmission distance,and strong anti-interference,and is particularly suitable for distributed acquisition system networking.To this end,this thesis developed a LVDS-based synchronous data aggregation platform hardware system.The system is designed with Hi Silicon Hi3535 processor and Xilinx Kintex-7 FPGA as the core design,and high-bandwidth data exchange is carried out between FPGA and processor through PCIe 2.0 bus;through external expansion of2 high-speed LVDS interfaces and drive equalization circuit,it adopts custom The LVDS transmission protocol realizes multi-node high-bandwidth link data aggregation and long-distance transmission;through the reception,control and transmission of the LVDS synchronous clock,the synchronous sampling control of each node is realized;through the external expansion of two gigabit network ports to the outside The network device sends data.The platform has the characteristics of high bandwidth,good realtime performance,strong scalability.This thesis has carried out functional tests on the developed hardware system,completed the key signal integrity simulation verification,and carried out bandwidth tests on transmission channels such as LVDS,PCIe,and Gigabit Ethernet ports.After testing,the system meets the requirements of various design indicators such as power supply,bandwidth,power consumption,and synchronization.