Year: 2019
Category: Robotics | Embedded Systems | Automation
Project Summary
Designed and built an Arduino-based autonomous mobile robot capable of detecting and avoiding obstacles in real time, with optional manual control via Bluetooth.
IMAGE 1
Figure 1: Autonomous mobile robot prototype with ultrasonic sensors.
Problem Statement
Enable a mobile robot to navigate unknown environments safely without continuous human supervision.
System Architecture
Arduino Uno as main controller
Ultrasonic sensors (HC-SR04) for distance measurement
Servo motor for environmental scanning
L293D motor driver for wheel control
Bluetooth module (HC-05) for manual override
IMAGE 2
Figure 2: Android app
Functional Modes
Autonomous Mode
Real-time obstacle detection
Automatic direction selection
Collision-avoidance logic
Manual Mode
Smartphone-based control via Bluetooth
User override for navigation
Engineering Highlights
Multi-sensor coordination to reduce blind spots
Dynamic path decision based on distance comparison
Fail-safe reverse and re-routing logic
IMAGE 3
Figure 3: Block diagram showing sensor, controller, and motor driver integration.
Results
Collision-free navigation in dynamic environments
Improved maneuvering accuracy
Cost-effective and modular robotic platform
Industrial Relevance
Inspection robots
Hazardous environment monitoring
Autonomous logistics systems
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