Electric Vehicle Charging And Navigation APP Design

In recent years,the development of electric vehicle battery technology and intelligent charging technology,as well as the improvement of charging infrastructure construction have accelerated the popularization of electric vehicles to a certain extent.However,the further popularization of electric vehicles in real life is still limited by the development of charging navigation service software.Therefore,it is urgent to develop a practical charging navigation software to promote the development and popularization of electric vehicles.The project in this paper originated from the charging navigation project of an electric vehicle company,and in response to users "mileage anxiety",an Android-based intelligent charging navigation software for electric vehicles is designed.The main tasks accomplished in this thesis are as follows:First,the software requirements analysis and the hierarchical design of the application architecture and modules are carried out according to user needs,and then the main functions of the map application are analyzed,including real-time positioning services,base map services,search services,route calculation services,navigation services,and “Charging easy” ervice,and outline design of each service module at the same time.Secondly,in response to the problem that GPS is not available and can not be continuously positioned in a specific environment,the solution of GPS data/inertial sensor data fusion positioning is adopted to realize the real-time positioning service function.When the GPS signal is not available,the original inertial derivative data is corrected by the second-order low-pass filter,and then the strapdown matrix is obtained by the quaternion method.Then the acceleration information in the navigation coordinate system is obtained by the state transition.Finally,the location information of the next position is calculated by the dead-track algorithm,so as to realize the real-time and continuous positioning of the user.Then,on the basis of GPS / INS integrated positioning engine,the whole map application is developed by MVC development framework,and the program implementation of each service module is given.At the same time,in response to users "mileage anxiety",charging stations are added to the consideration of the map calculation service,so that users can fully prepare for charging before departure,effectively avoiding users from being charged during the "mileage crisis".The status of a deserted island station has improved the user’s charging and navigation experience.Finally,the map application is tested,and the test results show that the service modules of the map application can run smoothly and basically meet the needs of users.