Design of ultrasonic reversing radar
Abstract
Reversing radar can monitor and warn the obstacles behind the vehicle in real time, and effectively reduce the incidence of reversing accidents. It is a key vehicle safety auxiliary system to make up for the defects of traditional reversing methods and improve parking safety. In this paper, an intelligent ultrasonic reversing radar system with DE2-115 FPGA development board as the core is designed and implemented. The system hardware adopts a modular architecture. The core components include HCSR04 ultrasonic sensor, LCD1602 liquid crystal display, four-digit digital tube, LED indicator and buzzer. The modules cooperate to complete distance detection and intelligent alarm functions ; the software is based on Verilog HDL hardware description language to achieve a complete digital logic design, including ultrasonic ranging, hierarchical alarm control, digital tube dynamic scanning and LCD display driver modules ; the experimental results show that the system can measure the distance of obstacles in real time and accurately, respond quickly and run stably. It can realize three-level sound and light alarm according to the threshold, and output distance information and safety state synchronously through digital tube and LCD, which can effectively improve the safety and intelligence level of reversing operation. It can provide practical reference for the design of embedded measurement and control system based on FPGA.