Design of multichannel data acquisition system based on Ethernet

Abstract

In order to multi-channel image data can be collected at the same time, Data package, Sent to the host computer, a multi-channel data acquisition scheme based on Ethernet transmission is proposed. Using synchronous RS422 bus + FPGA + Gigabit Ethernet hardware platform and multi-channel image data loop acquisition algorithm to achieve multi-channel image data through the synchronous RS422 bus into the FPGA, time-sharing by the FPGA for each road data collection, and then Gigabit Ethernet Network sent to the host computer. In the FPGA, the MAC address, IP address, UDP header and channel number are added to each image data, and the multi-channel data collection algorithm is adopted to overcome the phenomena of image data loss and channel disorder. 8 camera modules as a data source for testing, the results show that each road image data is completely correct to the host computer for display, image data packet loss rate of 0%, repeat rate of 0%, to meet the expected requirements, to achieve the purpose of detection of multi-channel transmission of data.