Blind Aid : Travel Aid for Blind

Visually impaired people face many problems in their day to day lives. Among them, outdoor navigation isone of the major concerns. The existing solutions based on Wireless Sensor Networks(WSN) and GlobalPositioning System (GPS) track ZigBee units or RFID (Radio Frequency Identification) tags fixed on thenavigation system. The issues pertaining to these solutions are as follows: (1) It is suitable only when thevisually impaired person is commuting in a familiar environment; (2) The device provides only a one waycommunication; (3) Most of these instruments are heavy and sometimes costly. Preferable solution wouldbe to make a system which is easy to carry and cheap