Indoor Positioning and Navigation Technology based on two Dimensional Code and Spatial Database
Xu Dingjie,Zhang Yue, Gao Wei, Zhang Ya, Fan Shiwei, Harbin Institute of Technology, China
The realization of indoor positioning navigation that does not depend on the satellite signal can be used in areas such as groundwater which receive less satellite signals or weak signals. Conventional signal-dependent outdoor positioning navigation technology is already very mature, but in some places such as the mountains, remote areas where GPS signal is weak, can not locate or the locate results of the situation often occur errors, which will lead to the planning of the navigation route is low credibility , it can be seen that this type of positioning navigation technology does not apply to the the indoor environment where can not accept the satellite signal.
Therefore, the goal of this paper is to establish an indoor positioning navigation system based on two-dimensional code and spatial database technology. The system does not depend on the satellite signal and network signal, and has strong anti-interference ability, and can realize high-precision positioning and navigation in order to improve the human activities and work efficiency.
Choose the identification position (such as the door, staircase, elevator, etc.) , for each logo produced the two-dimensional code logo which with its geographical location and related information, after the completion of the production. The dimension code is pasted to the corresponding identification position. And their correspondence records are stored, as the basic data of the point element database, to achieve indoor positioning. The distance between any two points is calculated and used as the basic data of the line feature database, and combine the optimal path algorithm is used to realize the indoor navigation.
Establish the system to achieve the indoor positioning and navigation,navigation accuracy control within 2 meters, the system has strong anti-interference ability,and do not rely on satellite signals and network signals.
4. Actual results
Based on two - dimensional code and spatial database technology, establish the indoor positioning navigation system. When user enter the indoor environment, the nearest two-dimensional code can be scanned to obtain the current location by the system prompts,,in order to achieve the indoor positioning.Then the user input destination, the system would automatically planning routes, to achieve indoor navigation. For Indoor environment with multiple layers, the system navigation will first navigate user to the nearest elevator or staircase,until the user reach the destination floor ,to navigate user to the target location, as well as the navigation accuracy within 2 meters.
5. Conclusion and meaning
Indoor positioning and navigation system based on the two-dimensional code and spatial database of has achieve accurate indoor positioning and navigation functions, compared the existing indoor positioning method has the advantages of low cost, strong anti-interference ability.The indoor positioning market (supermarkets, hospitals, libraries, etc.) and under the sea voyage (for example, underwater stealth aircraft carrier, ship, etc.) as well as in the weak signal places has the practical promotion of has practical meaning to promote.
At the same time, the accuracy of the system also need to be improved, you can fine-grained the location of the two-dimensional code and size specifications to achieve. Need some people responsibility for the late maintenance of the two-dimensional code,and change two-dimensional code regularly. So to consider before paste it, waterproof ,pollution prevention and other measures need to do, but also have regular fixed staff to check the replacement. Two-dimensional code logo using environmentally friendly materials to product,then the system is more perfect.