Design Of Beidou/GPS Shipborne Communication Navigation Terminal Software Based On Android

Due to urgent demand of market and promotion of national policy,China coastal province had started to build Beidou marine safety rescue information system at present,and it is definitely very important of the safety application of marine terminal.Currently domestic shipborne terminal based on Beidou is still on trial,existing terminal still exists many problems,such as obsolete operating system,simple function,low information fusion and high cost,etc.And it is not conducive to the promotion of Beidou system in marine application.With its open source code,abundance application,functional integrity,and user usability,Android operating system quickly occupied the intelligent terminal market.Aiming at these problems,this paper design a terminal software of Beidou/GPS shipborne communication navigation based on Android,to meet the actual demand of increasingly urgent.This paper first expounds the basic requirements and scalability requirements of the shipboard communication navigation terminal functions,combined with the development status of ship terminal application,according to the actual needs,design a Beidou/GPS carrier communication navigation terminal software based on the established Amlogic M3 processor hardware platform.Specific function include:driving user machine on Android platform,bluetooth communication between ship terminal and the mobile phone,short message communication and emergency alarm,positioning and navigation,the integrated electronic chart,etc.The hardware abstraction layer of user machine comprises the command parsing library of multimode satellite including Beidou First-Generation,Beidou Second-Generation and GPS.Secondly,it realized information fusion processing on software level,the integration electronic chart and the basic function of the positioning and navigation on Android platform,taking advantage of the compass short message to achieve daily communication,position report and several situation modes of emergency alarm.Again,it realized information sharing between mobile phones and shipbome terminal through the point to multipoint bluetooth communication technology,and the marked navigation,cursor navigation,route navigation and track record based on the mark-position function.Finally,test methods and results of analysis of the system software are given.The innovation of this paper:first,the decoding instruction methods of the multimode satellite including Beidou First-Generation,Beidou Second-Generation and GPS were packaged as a reusable dynamic libraries,which can be used on Android and Linux operating system,to solve multimode satellite receiver compatibility issues and code reusability problem.Second,it realized multiple scenarios communication based on the Beidou short message technology,ship position reporting and various forms of emergency alarm function.The advanced applications of this study can protect the marine fisheries production safety of the fishermen in a certain extent,and help for the improvement of the level of information management of marine fisheries.