DESIGN, DEVELOPMENT AND EXPERIMENTAL VALIDATION OF A HYBRID SENSOR FUSION BASED RADAR DETECTION SYSTEM WITH INTEGRATED RTC AND MULTI-LEVEL ALERT MECHANISM

This research presents the design and implementation of a Hybrid Radar-Based Object Detection System with Sensor Fusion and Real Time Clock (RTC) integration for accurate short-range monitoring applications. The proposed system combines an HC SR04 ultrasonic sensor for distance measurement and an HB100 Doppler radar module for motion detection to improve detection reliability. A servo motor-based scanning mechanism is used to rotate the sensors between 0 and 180, enabling wider monitoring coverage compared to fixed direction detection systems.TheESP32 microcontroller serves as the central processing unit and performs sensor data acquisition, fusion logic processing, camera triggering, alert generation, and communication tasks. When both distance and motion conditions satisfy predefined thresholds, the system confirms object presence and activates multi-level alerts including LED indication, buzzer alert, relay booster activation output, and GSM based SMS notification. A camera module is also used for visual verification to reduce false detections. Toenhance monitoring capability, a Real-Time Clock (RTC) module records accurate timestamps of detection events and alert activations.