Li-fi Based Blind Indoor Navigation System for Visually Impaired People

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Li-fi Based Blind Indoor Navigation System for Visually Impaired People

SKU: Li-fi Based Blind Indoor Navigation System Categories: ,


Synopsis :

                  The Li-Fi technology can transfer the data through LEDs. It is a high speed and low cost wireless communication system, compared to Wi-Fi. It can provide high security, large bandwidth, and low cost. Li-Fi uses common household LED (light emitting diodes) light bulbs to enable data transfer, boasting speeds of up to 224 gigabits per second. Light Fidelity (Li-Fi) is a bidirectional, high speed and fully networked wireless communication technology similar to Wi-Fi. The term was coined by Harald Haas and is a form of visible light communication and a subset of optical wireless communications (OWC) and could be a complement to RF communication (Wi-Fi or Cellular network), or even a replacement in contexts of data broadcasting.Li-Fi can be considered better than Wi-Fi because there are some limitations in Wi-Fi. Wi-Fi uses 2.4 – 5 GHz radio frequencies to deliver wireless internet access and its bandwidth is limited to 50-100 Mbps.This technology has been proposed as a solution to the RF bandwidth limitations. Indoor navigation is convenient to everyone and it is especially indispensable for the visually impaired. Li-Fi makes use of a free, unlicensed spectrum and is not affected by RF noise. Moreover, most indoor locations would have a sufficient amount of light sources and provide additional security since Li-Fi cannot penetrate through walls.

Existing System :

  • Braille display
  • Uses only simulation Platform

Proposed System :

                High brightness LED which act as a communication source. The transmitter unit is fitted to the wall/ceiling. In the transmitter the modulated information is transmitted through LED. Silicon photo diode which serves as a receiving element. The receiver unit demodulates the encoded binary data and give the response in the form of voice to the person. The receiver unit consists a photo transistor which receives the information from the LED connected to the transmitter. The information consist of location, and whenever receiver module comes in the range of that transmitter area than corresponding location message is send to receiver is stored in the IC APR33A3 and processed further to initiate voice to guide the person and vibrator motor to navigate the person which can assist visually impaired people at indoor places.

Advantages :

  • Audio output
  • Efficient for blind peoples

Block Diagram :

TX Section :

Li-fi Based Blind Indoor Navigation System for Visually Impaired People

RX Section :

Li-fi Based Blind Indoor Navigation System for Visually Impaired People

Hardware :

  • ARM7
  • RF TX & RX
  • IC APR33A3

Software :

  • Keil micro version
  • Flash Magic
  • Language: Embedded C

Applications :

  • Industrial applications
  • Blind Persons

Conclusion :

This paper will emerge as a promising technology in upcoming era by providing the navigation for visually impaired using LI-FI.

Additional information

Weight 1.000000 kg


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