By Shantanu
Delhi Public School, Patiala
IoT-Based Smart Blind Stick for Obstacle Detection and Alert Using Ultrasonic Sensors and Arduino
This project presents an innovative IoT-based smart blind stick designed to assist visually impaired individuals in navigating their surroundings safely and securely. The stick employs ultrasonic sensors interfaced with an Arduino microcontroller to detect obstacles in real-time. Upon detecting an obstacle, the system alerts the user through vibrations from the buzzer, providing immediate feedback to prevent collisions. The device enhances mobility, safety, and independence, and can be further extended with IoT communication features.
Visually impaired individuals face significant challenges in detecting obstacles while moving independently. Traditional mobility aids lack real-time obstacle detection capabilities, which can lead to accidents. This project aims to develop a low-cost, reliable smart blind stick that detects obstacles using ultrasonic sensors and delivers timely alerts to the user. Incorporating IoT features can enable remote monitoring and location tracking in advanced versions.
The ultrasonic sensors continuously emit ultrasonic waves and measure the time taken for the waves to bounce back from nearby objects. Using this time, the distance to the obstacle is calculated. When the distance falls below a predefined threshold, the Arduino activates the buzzer and vibration motor to alert the user of the obstacle ahead. The sensors are strategically placed to detect the barriers at different heights.
The Arduino program: