OBSTACLE DETECTION AND GUIDING STICK FOR BLIND

PROPOSED BY

KARTHIK. S, RAJESH. K

AP/ ECE- SSMIET & Team

We will either find a way, or make one.” –– Hannibal

To assist visually challenged people

To make a low cost device

To achieve maintenance free design

• Ultracane" has been available since 2011– a retail price of over $1,000 places it firmly out

of reach of many in developing countries.

• Smart Cane TM “by Professor Meenakshi Balakrishnan

–retailing at 3,000 Indian rupees (may have extra features completed trail)

Smart walking stick with wheels that could help impaired people in walking with less accident

The idea of obstacle detection bot is imported into this design with little modifications

Usage of ultrasonic sensors along with a controller will do better (up to 4m)

To reduce the power consumption Atmega 328 microcontroller is used (3.3V)

Ultrasonic sensors in three directions mounted on the stick will constantly sense the obstacles and report to µC.

µC will calculate the distance and will trigger an alarm/voice module if the obstacle is closer.

Distance of the obstacle is calculated using the velocity of ultrasonic waves and the time taken for the sensors to sense

This logic is programmed using C++ and downloaded onto the Atmega 328

The Atmega 328 microcontroller module is

cheaper and consumes less power

Ultrasonic sensors are widely available with

various specifications and cost

The design can be mounted on existing stick

by altering it with wheels

As it consumes less power there is no need to

change the batteries regularly

Rechargeable batteries will do better

Mobile phones and power hubs can also be

used (may be as a custom design)

COST*

*Single prototype

DEMO

ENHANCEMENTS

• Stick with GPS locater and voice module – Approximately: Rs 30,000 – 50, 000

• Stick to detect water and larger pits –• Approximately : • US/ Contact sensor sensor (pits or

Holes) : Rs.6900• WET sensor or Water sensor : Rs.8000 ( Distilled water)