In this study, a demonstration of the potential of ground-penetrating radar (GPR) for improving location of rebars is given. To this purpose, a high-frequency GPR system with a 2000 MHz dual-polarised antenna (HH/VV polarisations) has been used to collect data on a reinforced concrete floor of dimensions 1m × 0.80m (longitudinal and transversal acquisitions). The high-dense grid mesh of rebars and the use of the hyperbola fitting method allowed for the acquisition of a dataset of wave propagation velocity values. Hence, an analysis of the statistic distribution of propagation velocity values was carried out to assess the data dispersion throughout the area. A data sampling approach was then proposed and velocity values were sampled at different percentages and in an evenly-distributed manner throughout the inspected area. Corresponding values of velocity were therefore used for data migration purposes and C-scan maps were produced as a combination of longitudinal/transversal acquisitions and HH/VV polarisations. The optimum sampling rate of wave propagation velocity was then assessed by way of comparison of the migrated maps.

Tosti, F., Munisami, K.J., Sofroniou, A., Alani, A.M., Benedetto, F. (2018). A Sampling Investigation of GPR Wave Propagation Velocity Data to Improve Migration Processing of Concrete Rebars. In 2018 41st International Conference on Telecommunications and Signal Processing, TSP 2018 (pp.1-5). Institute of Electrical and Electronics Engineers Inc. [10.1109/TSP.2018.8441373].

A Sampling Investigation of GPR Wave Propagation Velocity Data to Improve Migration Processing of Concrete Rebars

Tosti, Fabio;Benedetto, Francesco
2018

Abstract

In this study, a demonstration of the potential of ground-penetrating radar (GPR) for improving location of rebars is given. To this purpose, a high-frequency GPR system with a 2000 MHz dual-polarised antenna (HH/VV polarisations) has been used to collect data on a reinforced concrete floor of dimensions 1m × 0.80m (longitudinal and transversal acquisitions). The high-dense grid mesh of rebars and the use of the hyperbola fitting method allowed for the acquisition of a dataset of wave propagation velocity values. Hence, an analysis of the statistic distribution of propagation velocity values was carried out to assess the data dispersion throughout the area. A data sampling approach was then proposed and velocity values were sampled at different percentages and in an evenly-distributed manner throughout the inspected area. Corresponding values of velocity were therefore used for data migration purposes and C-scan maps were produced as a combination of longitudinal/transversal acquisitions and HH/VV polarisations. The optimum sampling rate of wave propagation velocity was then assessed by way of comparison of the migrated maps.
9781538646953
Tosti, F., Munisami, K.J., Sofroniou, A., Alani, A.M., Benedetto, F. (2018). A Sampling Investigation of GPR Wave Propagation Velocity Data to Improve Migration Processing of Concrete Rebars. In 2018 41st International Conference on Telecommunications and Signal Processing, TSP 2018 (pp.1-5). Institute of Electrical and Electronics Engineers Inc. [10.1109/TSP.2018.8441373].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/345995
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