The Influence of Conductivity on the Reflected Ground Penetrating Radar SIgnal Amplitude

2018 ◽  
Vol 73 (2) ◽  
pp. 206-212
Author(s):  
M. S. Sudakova ◽  
M. L. Vladov ◽  
M. R. Sadurtdinov
Keyword(s):  
Ground Penetrating Radar ◽  
Signal Amplitude ◽  
Radar Signal ◽  
Ground Penetrating

scholarly journals Influence of Concrete Carbonation on Electromagnetic Permittivity Measured by GPR and Capacitive Techniques

2018 ◽  
Vol 23 (4) ◽  
pp. 443-456
Author(s):  
Xavier Dérobert ◽  
Géraldine Villain ◽  
Jean-Paul Balayssac
Keyword(s):  
Complex Permittivity ◽  
Ground Penetrating Radar ◽  
Low Frequency ◽  
Signal Amplitude ◽  
Radar Signal ◽  
Reinforced Concrete Structures ◽  
Concrete Carbonation ◽  
Ground Penetrating ◽  
Non Destructive ◽  
Non Destructive Techniques

This paper addresses the effect of concrete carbonation on the propagation and dispersion of electromagnetic (EM) waves and the capability of two EM, non-destructive techniques to detect this pathology. A capacitive technique operating at low frequency (around 33 MHz) and a ground penetrating radar (GPR) with a 1.5 GHz antenna were tested for the monitoring of reinforced concrete structures. To better understand the phenomena involved in concrete carbonation, the results of two complementary experimental campaigns were analyzed for saturated concretes. First, the dispersion curves of complex permittivity were measured for both carbonated and non-carbonated samples by a cylindrical coaxial EM cell. Due to carbonation, the permittivity decreased and the level of dispersion reduced slightly. Second, using GPR (coupled at approximately 900 MHz) and capacitive measurements conducted on controlled slabs, it was confirmed that the real part of the relative permittivity decreased within a range of 2 at 33 MHz and a range of 1 to 900 MHz, while the radar signal amplitude increased.

Buried target signature extraction from ground-penetrating radar signal: measurements and simulations

2005 ◽  
Vol 4 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Idesbald van den Bosch ◽  
Sébastien Lambot ◽  
Pascal Druyts ◽  
Isabelle Huynen ◽  
Marc Acheroy
Keyword(s):  
Ground Penetrating Radar ◽  
Radar Signal ◽  
Signature Extraction ◽  
Ground Penetrating

Study on Ground Penetrating Radar Signal Denoising Method Based on Surfacelet Transform and 3D Context Model

2014 ◽  
Vol 1010-1012 ◽  
pp. 1272-1275
Author(s):  
Dan Dan Liu ◽  
Zhi Qiu Yang ◽  
Chun Rui Tang
Keyword(s):  
Ground Penetrating Radar ◽  
Three Dimensional ◽  
Radar Signal ◽  
Signal Denoising ◽  
Context Model ◽  
Denoising Method ◽  
Subsurface Environment ◽  
Surface Singularities ◽  
Surfacelet Transform ◽  
Ground Penetrating

The ground penetrating radar and radar wave propagation in the subsurface environment is very complex. All kinds of noise and clutter interference is very serious, and detection echo data is a variety of with clutter. Therefore, the key techniques of data processing is to suppress clutter processing of ground penetrating radar record data. Surfacelet transform can efficiently capture and represent local surface singularities with different sizes. In order to improve the reliability of 3D ground penetrating radar detection results and accuracy, this paper presents a three-dimensional ground penetrating radar signal denoising method based on Surfacelet transform. Using Surfacelet transform and 3D context model for ground penetrating radar (GPR) analog signal to denoising, the noise in the case of low signal noise ratio (SNR) still can obtain a better result, and the simulations prove the effectiveness of the method.

Determining Bridge Deck Chloride Quantities Using Ground Penetrating Radar

2021 ◽  
Author(s):  
Anthony Alongi
Keyword(s):  
Ground Penetrating Radar ◽  
Bridge Deck ◽  
Bridge Decks ◽  
Cost Effective ◽  
Chloride Content ◽  
Signal Propagation ◽  
Radar Signal ◽  
Signal Loss ◽  
Deicing Salts ◽  
Ground Penetrating

<p>Chlorides from deicing salts attack the steel reinforcement in bridge decks which can ultimately cause delamination and deterioration of the concrete. For transportation agencies, the repair cost from these defects are estimated to exceed $5B per year in USA and make up between 50% - 85% of bridge maintenance budgets. While, the removal and replacement of chloride contaminated concrete is the most long-lasting and cost-effective remediation, few methods exist to determine chloride content in bridge decks. This research describes an entirely new method for determining chloride quantity in bridge decks using ground penetrating radar (GPR) technology and establishes and quantifies the relationship between chlorides in concrete (which cause corrosion of reinforcing steel and delamination of concrete) and the effect on GPR signal propagation. Specifically, it shows that there is a deterministic relationship between radar signal attenuation and the amount of chloride and moisture in bridge deck concrete, and that when moisture content is known it is possible to estimate chloride quantity based on signal loss or attenuation measurements. Our research also demonstrates the practical application of this concept by utilizing GPR along with limited coring (three or more core samples) and laboratory chloride measurements to produce an accurate and quantitative, spatial mapping of chlorides in bridge decks.</p>

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