Measuring of thickness of the asphalt pavement with Use of GPR
The results of development, tests and application of the GPR for measurement of the road asphalt layers thickness are presented in the paper. Main necessary improvements providing the possibility of use the GPR as a measuring device are described as well as some results of application of the GPR for inspection of the road structure after reparation the road. It was achieved accuracy of layers thickness measurement better than 0.5 cm.
Hilbert transform application to the impulse signal processing
Effective algorithm for processing impulse signals which are scattered by plane-layered media is discussed. The case, when effective thickness of layers is less than spatial size of an impulse is under consideration. Such problem of evaluating layers properties (thickness) is rather complicated for the implementation. Brief theoretical analysis of possibilities of various approaches for processing of signals is carried out. Computational algorithm and the corresponding software for evaluation not only a time delay, but also geometrical characteristics of the investigated structures are described. Both results of numerical modelling, experimental researches and sensitivity and resolution of different approaches are presented and discussed.
Sampling duration for noisy signal conversion
A selection of the working band (sampling duration) of the sampler for optimal recording of noisy videopulse radar signals has been considered in the present work.