The Design Of The Radar Control System Based On CAN Bus

This topic is to solve technical requirements due to the development trend of VTS (Vessel Traffic Services) network and problems about the lack of network now. Using today’s more widely CAN bus technology, which makes terminals that is the low rate in the radar station all hook up to CAN bus, it establishes control network based on CAN bus. It is convenient for the operation center to do centralized management, centralized control and centralized monitoring for the low rate terminals. At the same time, this topic remoulds marine radar instead of VTS radar, which aims to realize the modern management for small and medium-sized port including inland river and reduce the cost, improve the reliability of the VTS system, simplify the system equipment and reduce costs of equipment maintenance.Firstly, this paper studies the control mechanism of the reference radar (Japanese FURUNO FAR2827 series), analyzes ARPA and transceiver interface signals and measures by experiment control instruction set. Through the research of these instructions and radar working process,using FPGA to design and implement the radar controller. Secondly, through the research of CAN (Controller Area Network) bus, we design the application layer protocol which effectively improves the efficiency of data transmission and is suitable for this system. Using single chip microcomputer as intelligent control chip, SJA1000 as the CAN controller, it designs and implements the CAN communication network system.Finally, according to the working process of the radar, the human-computer interaction interface is based on C++, instead of the keyboard and display function, which completes control of the transceiver and display function of the radar state.This system consists of three major functional units, including radar controller, CAN network systems and human-computer interaction interface. Every function unit has been tested, and coincides with the design standards. Finally, it connects three functional units to form a complete radar control system, which implements the Marine radar’s reconstruction, completes the local and remote control of the transceiver, and improves the real-time and reliability.The design of the system has high practical value for the construction of our country VTS network.