Research And Implementation Of Indoor Navigation System Based On AR And IBeacon

With the development of mobile Internet technology,people increasingly rely on location and navigation services provided by smart phone navigation software when traveling.People have widely used traditional navigation software based on GPS and other location services when navigating outdoors,however,these software encountered difficulties in indoor navigation.The reason is that the scale of large public buildings such as bus hubs,shopping malls and libraries is becoming larger and larger,and their functions are becoming more and more complex,at the same time,due to the limitation of indoor environment,smart phones cannot use GPS and other signals to locate indoors,therefore,it is of great significance to study indoor navigation to provide indoor navigation guidance for people playing in large public buildings and facilitate their travel.Mainstream indoor navigation technologies include Wi Fi and Bluetooth.Since the Wi Fi fingerprint database needs to be updated frequently,the manual maintenance cost is high,this paper uses Bluetooth for indoor navigation.(1)Aiming at the problem of insufficient positioning accuracy in Bluetooth two-dimensional navigation,a key point algorithm is proposed.In order to solve the uncertainty of positioning accuracy caused by the instability of RSSI,firstly,Dixon filtering algorithm is applied to denoise the collected RSSI data,then three key points P1,P2 and P3 are determined respectively by comparing the fingerprint,the weighted central points of the nearest Bluetooth and N beacons,finally,the real-time position of the object to be located is obtained by averaging the three key points.The experimental results show that the key point algorithm can effectively improve the positioning accuracy.Based on the key point algorithm,the indoor two-dimensional navigation software is developed in this paper.(2)Aiming at the problems of low recognition of indoor two-dimensional navigation space and direction,difficult for users to accurately determine indoor position and direction,and poor user experience,this paper applies AR technology to indoor real scene navigation.Based on the comparative analysis of existing AR technologies,in order to solve the problem of building indoor real scene navigation spatial map,the sparse spatial composition method is adopted,and the map information is saved by scanning indoor spatial feature points through the camera;When setting the path and key points,the AR identification tracking and positioning technology is applied to form a visual road strength geographic information network through the association marks to the indoor road network nodes;Finally,after computer vision processing,the 3D model is fused to the camera field of view to guide the path direction in the navigation process.Using the above technology,this paper developed an indoor real scene navigation system based on AR,and the system has a good effect.The test results show that the iBeacon combined with AR navigation system is effective.It realizes the function of generating real-time AR enhanced path guidance combined with two-dimensional navigation in indoor environment,The research results have good application value and lay a foundation for further research work.