GPR Application with Different Antennas for Road Pavement Condition Assessment

The goal of the presented work is further improving the methods for obtaining primary GPR data sets that have been previously proposed by the authors, and further improving the methods for processing pulsed GPR signals. In the process of obtaining and processing experimental data, modern georadars and methods of computer modelling developed by the authors and mathematical models for analyzing the obtained results were used. The main problem of the considered issues is: the dielectric constant of the medium is not only unknown a priori, but also varies from layer to layer. Therefore, we have the previously proposed scheme for the layer-by-layer determination of the values of the relative permittivity with the subsequent determination of the thickness of the corresponding layer. The paper contains some results of real experiments carried out with different GPRs and also the results of processing the obtained data. One of the results of the research is an improved signal calibration method, which makes it possible to increase the reliability of assessing the thickness of road pavements and other objects.