FPGA-BASED SMART TUNNEL ADVERTISING SYSTEM WITH ULTRASONIC PERSON DETECTION

This paper introduces a pioneering FPGA-based automated tunnel advertising system that leverages ultrasonic person detection to activate high-definition LCD displays, revolutionizing energy-efficient advertising in transit environments like subways and vehicular tunnels.The system integrates an HC-SR04 ultrasonic sen-sor for precise human presence detection within a 2-400 cm range, an Edge Artix-7 FPGA for high-speed signal processing, and a 16x2 LCD to display alphanumeric advertisements.Implemented using Verilog HDL on the Xilinx Vivado platform, the system employs a finite state machine (FSM) to manage sensor triggers, dis-tance calculations, and display activation, achieving a 12-microsecond trigger pulse and a 25 ms timeout for robust detection.An LED indicator signals detection events,