Magnetic field data acquisition technology of dual-ring network based on STM32+W5500

[Objectives] In order to obtain multiple magnetical signature in different directions of a ship's external environment in realtime so as to make a appropriate degaussing scheme and provide data base for ship to realize magnetic stealth smoothly,a distributed acquisition system of dual-ring network is constructed.[Methods] The system is based on ARM(Advanced RISC Machine)embeded architecture with STM32F4 series chips as the microcontroller,which can obtain realtime magnetic data of 128 channels in the field and transmit them to the centralized control center/host computer by virtue of Ethernet communication technology.[Results] The system can pre-process the magnetic field data of different parts of the ship and transmit them to the centralized control center/host computer through optical fiber dual-ring network for subsequent processing.[Conclusions] The field operation tests show that the data acquisition system can reliably and accurately acquire multi-channel and big data in real time and has the value of extended application.