01 Introduction
PERIMETA is a radar-style ultrasonic detection system designed to scan its surroundings, identify objects within a defined range, and provide real-time alerts. It leverages the simplicity of ultrasonic technology combined with Arduino processing power.
02 Aim & Objectives
- Use ultrasonic sensor and Arduino for accurate distance measurement.
- Enable a scanning function by rotating the ultrasonic sensor with a servo motor.
- Detect obstacles within a critical distance and trigger alerts.
- Display measured distance in real-time on an LCD screen.
03 Working Principle
Step 1
Sweeping Motion
A servo motor rotates the ultrasonic sensor back and forth across a set angle (e.g., 180 degrees).
Step 2
Distance Measurement
The Arduino calculates the distance by measuring the time taken for high-frequency sound waves to return as echoes.
Step 3
Data Processing
If an object is detected within a pre-defined 'critical zone', it triggers audible and visual alerts.
Components
Arduino Uno
The central processing unit (The Brain).
HC-SR04 Ultrasonic Sensor
Primary detection device (The Eyes).
SG90 Servo Motor
Provides panning motion for scanning (The Neck).
I2C LCD 1602
Real-time user interface (The Information Screen).
Passive Buzzer & LEDs
Audible and visual alert system.
Applications
Vehicle Safety Systems (Parking assistance)
Autonomous Robots (Navigation and obstacle avoidance)
Security & Perimeter Monitoring
Industrial Automation
Future Scope
- • LiDAR or mmWave Radar integration for higher accuracy.
- • Wi-Fi/Bluetooth connectivity for smartphone alerts.
- • IoT platforms (Blynk/Thingspeak) integration.
- • AI-based object classification.