Design And Implementation Of Seamless Navigation System In Indoor And Outdoor

Accurate positioning and navigation systems have brought great convenience to people's travel and life,and they are also an indispensable part of today's life.The current relatively mature navigation systems are based on outdoor scenes,and most of them cannot be used in indoor scenes.With the popularization of indoor and outdoor positioning research results,building a seamless positioning and navigation system suitable for multiple scenarios has become a research hotspot in the field of navigation.In response to the above problems,a seamless positioning and navigation system that is suitable for both indoor and outdoor is designed and implemented.First,in the indoor map construction stage,a hierarchical and regional indoor map editing tool was designed for the indoor map including the characteristics of buildings,floors and regions.Designed and implemented the storage structure for the edited map,and finally stored it in the database.On the mobile terminal for seamless positioning and navigation,the three core functions of seamless indoor and outdoor location search,path planning and navigation are realized.In the indoor and outdoor seamless search phase,related tools are used to create an indoor map index,and a unified indoor and outdoor location query interface and search result ranking strategy are designed and implemented.In the path planning stage,design and implementation of the entrance and exit anchor point selection algorithm and related data interaction format,thereby ensuring that the indoor and outdoor path planning is more reasonable.Finally,in the navigation phase,an indoor and outdoor scene recognition algorithm based on smartphone-related low-power sensors is designed and implemented,which is used for scene recognition and switching when the user is in the initial positioning or indoor diplomacy.In addition,a method of tracking the projection point of the user on the planned path during the navigation process is proposed to determine whether the user's position is too far away,and to re-plan the path if necessary.The indoor map editing tool and the seamless navigation and positioning system have been tested functionally.The test results show that the map editing system can meet the needs of building indoor maps,and the seamless positioning and navigation system can achieve indoor and outdoor positioning and navigation functions in multiple scenarios.In order to verify the accuracy of the indoor and outdoor scene recognition algorithm,a variety of experimental scenes were constructed for experiments.The experimental results show that the indoor and outdoor scenes can be effectively identified with the help of smartphonerelated sensors.Due to the limited test equipment,the performance of related functions in more devices has not been fully evaluated.In the future,we will consider adding test equipment,accumulating experimental data,optimizing related parameters,and further improving user experience.