Design And Implementation Of A Dual Mode Positioning Receiver For Beidou Navigation And Monitoring System

With the rapid development of the general aviation industry,new requirements are put forward for aviation monitoring and managing system,Beidou navigation monitoring network system can monitoring and controlling the state of the air vehicle in real-time.The country has already included this system construction in the next step of development plan.This project is based on the construction of the Beidou navigation monitoring and management system,we independently developed a dual mode airborne positioning receiver which can be used for Beidou navigation monitoring and managing system. Based on the requirement of navigation receiver,this paper mainly researches and realizes the following three aspects.First the hardware design of the navigation receiver is carried out. The positioning receiver uses the black box model,we take iMX6Q as the main control core of the system hardware,we use the UM220-? chip for dual mode positioning and the TM0558 as the RDSS short message communication module. After that,we focus on the design of the circuit,which provides the hardware platform for the system.Secondly,the paper has studied the Android system,taking the hardware of the project design as the objec. the Android system was targeted for transplantation.Including the transplantation of U-boot,Android kernel and Android file system. After that the hardware platform of the project design is verified which provides the software platform for the upper layer software.Then,this paper developed a display and control software for the navigation receiver. The black box without a display device,so we choose Android mobile devices as the display and control platform. The black box host and connect with Android mobile terminal through bluetooth,then we use Eclipse integrated development environment and JAVA language to develop the control software.Through the test,the control software can be easily used to complete the status monitoring of the navigation and positioning receiver and the interaction control with the use of the mobile Android device.Finally, the navigation performance of the Beidou is analyzed.Through the analysis of the data accumulated in the preliminary test,the navigation performance of the Beidou and GPS were compared in the aspects of static, dynamic and visible stars and GDOP, respectively.According to the analysis results, the navigation service performance of the Beidou navigation system can easlilymee teet the demand of the monitoring system.This project has completed the research and implementation of the navigation dual mode positioning receiver ,also the display and control software. Through the test,the navigation positioning receiver can upload the positioning results in real time to the ground control box,this realize the monitoring function. Also we can send customized messages and control messages through the Beidou short message to realize the control function. In summary,the system meets the design requirements of the Beidou navigation positioning receiver.