LIFI BASED INDOOR NAVIGATION SYSTEM FOR THE VISUALLY IMPAIRED PEOPLE
S. Praveena, Teena Sree G, Winonah Rajendran, P Pavithra · International Journal of Engineering Applied Sciences and Technology · 2020
Localization and navigation system are practically viable and can easily be used but are not commonly used in real time.According to world health organization there were 285 million visually impaired people and 39 million were blind.Various technologies like RFID, ZigBee have been suggested but they all possess serious drawbacks and hence are not practically used.In this paper an indoor navigation and information system that is easy to implement and use has been proposed, because it uses visible light communication (VLC), which is an ideal technology for an application like this.Visually impaired people confront unique challenges in their day-to-day life when navigating in unfamiliar public locations.The proposed system focuses on designing a device for visually impaired people that is comfortable, user friendly and also helps travelling independently.A VLC navigation system is useful for assisting blind people.This system aims to provide location information in the absence of explicit instructions and can be a supporting method for users who travel in buildings.The transmitter section contains LED lights emitting visible lights that contain positional information to provide direction to the user.In the receiver section the embedded system calculates the optimal path to a designation and speaks to the person through a headphone or speaker.In addition to the basic navigation capabilities, the proposed system also aims to provide the user certain information on the nearby points-of-interest (POI) and accessibility issues such as stairs, drain, etc.The voice or data is used as an output result of transmission of LED lights.