Radar image processing for detection of shape of voids and location of reinforcing bars in or under reinforced concrete

摘要

Deterioration of pavements or tunnels results primarily from the existence of voids under the pavements or tunnel linings. To detect these voids effectively by non-destructive tests, a method using radar was proposed. In this research, not only the detection of shape of voids, but also the location of reinforcing bars by radar image processing are investigated. The experiments and simulation were conducted to detect voids and to locate reinforcing bars in or under concrete pavements (or tunnel linings) with reinforcing bars. From the results, the fundamental algorithm for tracing the reinforcing bars and voids, improving the horizontal resolution of the object image and detecting shape of objects, was verified.