Design Research On Indoor Navigation System For Visually Impaired People Based On User Experience

According to the statistics of the World Health Organization in 2017,there are approximately 253 million visually impaired people worldwide,and one-fifth of them are in China.Travel problems caused by vision defects have severely restricted their right to equal social welfare.Aiming at the current inaccuracy of the indoor positioning of the blind guide system and the difficulty of understanding the guidance information,this project proposed a wearable indoor navigation system based on user experience,which perceives the scene through augmented reality technology and guides visually impaired users to walk indoors through multi-mode interaction.In this project,the user experience design process is integrated into each development link of the navigation system.Taking the development status of the guide system as the starting point,the analysis shows that using smartphones as the carrier and utilizing augmented reality technology to realize indoor navigation will become the main research trend in the field of navigation for the visually impaired in the future.Then,this topic combines the characteristics of the visually impaired and their travel needs,clarifies the design requirements of the indoor guidance assistance system,and proposes the design idea of the indoor navigation system for mobile navigation applications combined with wearable auxiliary equipment.The subject divides the system into two functional modules: positioning and path planning,and human-computer interaction.The navigation unit,mobile application unit,and guiding belt unit of the system are tested for usability and user experience evaluation.In the positioning and path planning module,the indoor navigation system mainly uses easy AR technology to construct a three-dimensional visual map,marks points of interest(POI),realizes relocation and posture tracking in the real scene,and then plans the path.In the human-computer interaction module,this system adopts a multi-channel interaction mode of music sound,synthesized speech combined with continuous tactile transmission to provide visually impaired users with concise,intuitive,and continuous guidance information.In this part,the subject refers to competing products for navigation mobile applications and barrier-free design guidelines and proposes a mobile application with fewer levels of architecture and obvious visual contrast.Based on the theory of embodied cognition and the two points of the human body surface tactility,the system proposes a guiding belt that can provide continuous tactile guidance.The results of the unit test process and data analysis show that the indoor navigation system can not only provide accurate indoor positioning to a certain extent,easy-to-understand direction guidance,basically meet the independent travel needs of visually impaired users,but also provide visually impaired users with relatively good experience.Although the indoor assisted navigation system for the blind proposed in this topic currently has certain technical and design problems and requires further iterative optimization,its solutions can basically meet the needs of independent traveling visually impaired users.The advantages of relatively accurate indoor positioning,intuitive and concise guidance information,and low equipment cost have high practical significance and social value.It is worthwhile to improve the technology and further optimize the system plan.