This document proposes a navigation system using RFID technology to help visually impaired people work in industries. It aims to minimize their dependency by using an RFID tag grid and reader embedded in a mobile device and shoes. When the RFID reader detects a tag, it provides voice guidance through Bluetooth to guide the user. An ultrasonic sensor is also included to detect unexpected obstacles and activate a vibrator. This system is technically and economically feasible to benefit the visually impaired.

1. EMBEDDED SYSTEM WIRELESS
DESIGN FOR VISUALLY IMPAIRED TO WORK AT INDUSTRY USING
RFID TECHNOLOGY
ABSTRACT
One of the technical challenges for the modern society to detect and find a solution
for visually impaired, with increased security and service motto towards the society helped to
bring a solution which would help the visually impaired in the industries and other companies.
Here we had come out with a prototype as a way of finding a solution to the visually impaired.
The navigation assistant technology using RFID Tag Grid minimizes the dependency.
The reader used in this system is embedded in the mobile and shoes to avoid
dependency on travel. The RFID reader matches with the information specified to that ID and a
voice signal is generated. Wireless RF links is placed in the Bluetooth device/ headphone for
voice guidance. The proximity sensing unit is an auxiliary unit is added as a solution to address
unexpected and non-mapped obstacles in the user’s path. Basically it contains ultrasonic Sensor
Unit interfaced with microcontroller which is inter-linked to a vibrator that would be activated
when nearing obstacles. This system is technically and economically feasible and may offer a
maximum benefit to the disabled
EXISTING SYSTEM
Marta Mei developed a project named GLIDEO (Glove for Identification and
Description of B Objects) it had a database to store the tag information which can be updated
from the on net sources available on internet.
DISADVANTAGES
 This system possess a security issue and building and maintaining of these databases is
highly risky since it varies from time to time
PROPOSED SYSTEM
The system reduces the external dependency on a central database, the RFID is used
to find out the people location in the industry and keypad is used to give the information about

2. EMBEDDED SYSTEM WIRELESS
how to reach the destination. This system is more advantageous and requires lesser
implementation of time.
ADVANTAGES
 Through developed with the welfare of the visually impaired in mind, the system could
still be used by all people, making the system economically feasible.
BLOCK DIAGRAM
1. Transmitter unit
ADCUltrasonic
Sensor
Micro
controller
Keypad
Head phone /
Speaker
LCD
Display
Relay DC Motor
Power Supply Unit
Step down
Transformer
(230 to 12v AC)
Bridge
Rectifier
Filter
Circuit
Voltage
Regulator (IC
7805)
GSM
module
UART

3. EMBEDDED SYSTEM WIRELESS
HARDWARE REQUIREMENTS
 Ultrasonic sensor
 RFID tag
 RFID reader
 LCD display
 Motor driver
 Motor
 Micro Controller
 Headphone / speaker
 GSM module
 keypad
SOFTWARE REQUIREMENTS
 Embedded C
 mplab compiler