Short-chirp signal-based ground penetrating radar system for detecting shallow-depth pipelines

摘要

Since 1988, we have developed four types of impulse ground penetrating radar (GPR) systems for locating buried structures and utility pipes. The main aim of our GPR development has been improving GPR antennas in matching sizes and depths of detected buried objects. In this paper, we propose short-chirp signal processing and implement a short-chirp signal-based GPR system that performs side-lobe suppression against ground-reflected waves. The verification results indicate that the GPR system can scan from 0.2 to 1.8 m depth, which is better than our current impulse GPR system, and resolve a distance of 0.15 m between iron bars within reinforced concrete.