Research and Development|Live

VAJRA

Multi-sensor on-device counter-UAS system with custom-trained visual (YOLOv8n) and acoustic (CNN) deep learning models. Runs entirely on a smartphone with zero network dependency.

Overview

Complete C-UAS pipeline on a single Android device. Three detection modalities: visual (camera + custom-trained YOLOv8n, 12MB), acoustic (microphone + FFT + custom-trained CNN, 129KB), and RF spectrum analysis. All fused into a unified tactical threat display with countermeasure control.

Specs

VisualCustom YOLOv8n, 12MB, >25 FPS

AcousticFFT + CNN classifier, 129KB, <100ms

Database8 drone profiles with 22 parameters each

APK38MB total, zero network dependency

Features

Custom-trained YOLOv8n (nano) on drone-specific imagery at 320x320
Real-time 1024-point FFT for propeller frequency detection (50-500 Hz)
CNN classifier on mel spectrograms for 5-class drone type classification
8 drone profiles (DJI Mavic 3, Bayraktar TB2, Shahed-136, FPV Attack, etc.)
All ML inference runs locally via TensorFlow Lite

Tech Stack

KotlinTensorFlow LiteYOLOv8CameraXFFTAndroid

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