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The aim of this Arduino Radar project is to achieve a radar system prototype based on an Arduino board that detects stationary and moving objects. We come across situations where we need to keep a watch over prohibited areas to avoid trespassing. Now keeping human labour for this purpose is costly and also not reliable for keeping a watch over an area 24×7. So for this purpose an ultrasonic radar project for an unauthorized human / animal or object detection system.
The system can monitor an area of limited range and alert authorities with a buzzer as an alarm. For this project we use an Arduino UNO board that is connected to an ultrasonic sensor mounted on a servo motor for monitoring. We also interface a buzzer and processing screen for monitoring the detection status. The radar antenna transmits radio wave pulses that bounce off any object in its path. The object returns a portion of the wave received by the receiver which is in line of sight with the transmitter.
The Arduino board sends a signal of +5V to the trig pin of Ultrasonic Sensor HC-SR04 which triggers the sensor. Then it provides rotational action at the servo motor mechanically fitted along with ultrasonic Sensor HC-SR04 so that it can detect the moving objects and locate within 180 degrees.
The Arduino sends a HIGH pulse width of (10 S) on the TRIGGER pin of the sensor to regenerate a series of ultrasonic waves that propagate through the air until it touches an obstacle and returns in the opposite direction towards the sensor pin ECHO. The sensor detects the width of the pulse to calculate the distance. The signal on pin ECHO the sensor remains at the HIGH position during transmission, thereby measuring the duration of the round trip of ultrasound and thus determining the distance and “Processing” software screen showing any obstacle with angle.
Applications and Advantages2. Radar procurable value is very low.
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