Advance visualization of inner concrete structure using micro-wave subsurface radar

In this report, an improved signal processing procedure with a novel measurement system is considered for advanced visualization of inner concrete structures. In order to visualize the inner concrete structures more exactly in an efficient way, a 2-step search procedure is proposed by developing an antenna scanning system which can be scanned on an arbitrary route manually and estimate its self-position automatically. In the first step of the procedure, the antenna is scanned arbitrarily on a concrete in order to visualize approximate arrangement of the inner structure by applying the principle of synthesis aperture. Then, in the second step, the antenna is scanned straightly across the buried objects respectively, in order to visualize detailed attributes such as exact positions or materials of the buried objects by an advanced signal processing method. Evaluation of the proposed signal processing procedure has been carried out experimentally by observing a concrete test specimen, which imitates a part of general concrete wall, and finally, fundamental effectiveness has been confirmed.