Evaluation device for the cavum under the pavement of a road and method thereof

摘要

According to one aspect of the present invention, provided is a device for evaluating a cavum under the pavement of a road, including a permittivity change output unit (10) for outputting permittivity for each medium below a road pavement layer by amplitude of electromagnetic waves reflected after being vertically transmitted to a ground layer of a road, a cavum determination unit (20) calculating the depth of each medium corresponding to the amplitude of an electromagnetic wave different in intensity from the transmission and reception of the electromagnetic wave, comparing and calculating the amplitude attenuation of the electromagnetic wave reflected by each medium with the amplitude attenuation with respect to a reference medium, and outputting data on the presence of the cavum with respect to the ground layer medium and the type thereof, and a data output unit (30) for mapping and displaying the data on the cavum output by the cavum determination unit (20).