Research And Implementation Of Marine Radar ARPA System Base On DM3730

Automatic radar plotting protocol (ARPA) is a kind of ship collision avoidancewarning system, plays an important role in guiding the ship navigation safety.At present,in addition to large ocean-going ships must install ARPA radar, small cargo ships,fishing boats are gradually equipped with radar equipment with ARPA function.Thisthesis mainly discusses how to implement the ARPA system in the embedded platform,and from the view of engineering practice, the key parameters of ARPA algorithm isimproved, based on the view of Engineering, reduce the difficulty of projectimplementation.This thesis introduces a design based on the DM3730embedded processor marineradar ARPA system, and according to the system demand design radar data processingand control command transmission process of embedded ARPA system. The maincontents are as follows:1.Study of traditional ARPA algorithm and the existing adaptive algorithms,optimize key parameters of adaptive algorithm. Compared with the traditional ARPAalgorithm, the target of uniform motion in a straight line when the same performance,and when the target maneuvers, optimized adaptive algorithms have obvious advantages.To implement the algorithm with heterogeneous dual-core framework, algorithm in theARM is packaged as a API for the system control software, while the algorithm isperformed in the DSP core, heterogeneous dual-core framework reduces the load systemat ARM, greatly improve the response speed of the system. Radar scan cycle for2.4seconds, in order to improve the real-time data processing, algorithm and the driver witha screen, the radar data processing is divided into100parts, each dealing with a data isimmediately transmitted to the display software.2. In order to achieve the maximum data throughput and minimal system load,device driver uses the ping-pong buffer and DMA to acquire radar target data. Thecharacteristics of this article ping-pong buffer ARM, DSP and DMA tripartite shareddrive after receiving the data does not require secondary copy, the DSP core can beprocessed directly on the ping-pong buffers, ping-pong buffer switching DMA independent data receiving process without CPU intervention.3. System control software, which is mainly responsible for the interaction betweenthe interface, DSP algorithms and drive. The whole control data transmission, radarfront-end configuration and control of DSP algorithms, it is control hub of the wholesystem. System control software handle all operating platform, to ensure the portabilityof the display software.4. Reference standard design ARPA information display interface and logo. Userinterface use QT platform system call, completely QT library code, so that it has astrong portability. The development and debugging of the interface on the PC platform,cross-compiler finished to run in selected embedded platforms.