The Study And Implement Of Network Communication Technology Of The Radar Images On VDR

The information network is the important menas to improve work efficiency and strengthen the management.With the shipping automatization improving,it's necessary to develop the oceanic productions into netwokr.For adapted the developmental market,the card of radar at VDR uses the design of network communication,and makes the data collection and transmission easier,also guarantees the data stream fluency and integirty;on the one side,it ensures the data security and reliability.Based on the purpose,this thesis introduces the reanalysis and redesign of the network of the card of radar at VDR and computer.At first,the article introduces the background and meaning of the research,analyses the developments of the technology of static image compression and network DSP;it analyze and compare the static image compression algorithm,and make sure to adopt the compression algorithm of SPECK;it analyze and compare the technology of the network DSP,and make sure to adopt the project.The project include DSP,the operating system of the DSP/BIOS and the easy protocol of TCP/IP.For the characteristics and the actual needs of the embedded systems,put forward the embedded protocol of TCP/IP,analyses the basic protocol of the embedded protocol of TCP/IP.In accordance with the requirements of this article,choices the needed protocol in the protocol of TCP/IP,gives the concrete realization of the protocol of ARP,IP,ICMP and TCP.In this paper,the hardware platform of the network communications of the VDR radar images is design,gives the details of the main device DM642,gives the desigend project of the seamless connectivity of the DM642 with the devices of flash,SDRAM and LXT971,gives the desigend project of the system power and reset.In this paper,the network driver of the DM642 is design,programmes the application software of the server-side and client The application software is test at hardware platform, and gievs the test results.Designed system of the network communications of the VDR radar images and in this paper will be put into use the actual production.With the system function better and to promote.Marine products facility in China will be into the information age.