Interference Mitigation Achieved with a Reconfigurable Stepped Frequency GPR System

Persico, Raffaele; Leucci, Giovanni

doi:10.3390/rs8110926

Cited by 9 publications

(4 citation statements)

References 17 publications

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“…The effects of electromagnetic interferences and approaches to counteract them are thoroughly addressed in [58]. In [59], on the contrary, interferences were on purpose generated in order to facilitate the detection of buried utilities: in particular, radio-frequency tags were attached to buried pipes in order to generate strong resonances in the GPR spectrum and then, by analysing the signal in the time or frequency domain, it was possible to achieve enhanced detection of the pipes.…”

Section: Gpr Signal Processing In the Spectral Domainmentioning

confidence: 99%

Railway Track Condition Assessment at Network Level by Frequency Domain Analysis of GPR Data

et al. 2018

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Abstract:The railway track system is a crucial infrastructure for the transportation of people and goods in modern societies. With the increase in railway traffic, the availability of the track for monitoring and maintenance purposes is becoming significantly reduced. Therefore, continuous non-destructive monitoring tools for track diagnoses take on even greater importance. In this context, Ground Penetrating Radar (GPR) technique results yield valuable information on track condition, mainly in the identification of the degradation of its physical and mechanical characteristics caused by subsurface malfunctions. Nevertheless, the application of GPR to assess the ballast condition is a challenging task because the material electromagnetic properties are sensitive to both the ballast grading and water content. This work presents a novel approach, fast and practical for surveying and analysing long sections of transport infrastructure, based mainly on expedite frequency domain analysis of the GPR signal. Examples are presented with the identification of track events, ballast interventions and potential locations of malfunctions. The approach, developed to identify changes in the track infrastructure, allows for a user-friendly visualisation of the track condition, even for GPR non-professionals such as railways engineers, and may further be used to correlate with track geometric parameters. It aims to automatically detect sudden variations in the GPR signals, obtained with successive surveys over long stretches of railway lines, thus providing valuable information in asset management activities of infrastructure managers.

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Section: Gpr Signal Processing In the Spectral Domainmentioning

confidence: 99%

Railway Track Condition Assessment at Network Level by Frequency Domain Analysis of GPR Data

et al. 2018

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“…Integration time: Unlike any commercial stepped-frequency GPR, the reconfigurable prototype allows to set a different integration time for each frequency. This option allows to reject interferences (due, e.g., to external electromagnetic sources) without prolonging too much the acquisition time [13,14]. 2.…”

Section: The Stepped-frequency Gpr Prototypementioning

confidence: 99%

Real-time visualization of the data gathered by a reconfigurable stepped-frequency GPR system

Brigatti¹

2019

GPR

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This paper describes recent improvements made to the acquisition software of a reconfigurable stepped-frequency ground penetrating radar (GPR) prototype, to allow real-time data visualization. In particular, real-time data visualization was not yet implemented in the previous version of the acquisition software, although this is a common feature available in all commercial systems. This was a bad problem for the GPR prototype: the possibility to visualize data in real time is obviously of vital importance, because it makes it possible for the user to easily identify promising areas in the field, or to recognize an anomalous functioning of the system without wasting a day of work. So far, real-time data visualization was not yet possible because the prototype at hand is equipped with three equivalent couples of antennas that can transmit and receive data simultaneously, which implies a quite large amount of data recorded per second. Nonetheless, by implementing suitable procedures for a more efficient data handling, the problem has been successfully solved and now the prototype is not anymore "blind" in the field.

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“…WG 1 focused on the development of novel GPR instrumentation. Within this WG, novel equipment was designed, implemented and tested [6][7][8][9][10][11]. Moreover, new tests were proposed for checking the performance and stability of GPR systems.…”

Section: Cost Action Tu1208 and The Open Database Of Radargrams Initimentioning

confidence: 99%

TU1208 Open Database of Radargrams: The Dataset of the IFSTTAR Geophysical Test Site

Dérobert

Pajewski

2018

Remote Sensing

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This paper aims to present a wide dataset of ground penetrating radar (GPR) profiles recorded on a full-size geophysical test site, in Nantes (France). The geophysical test site was conceived to reproduce objects and obstacles commonly met in the urban subsurface, in a completely controlled environment; since the design phase, the site was especially adapted to the context of radar-based techniques. After a detailed description of the test site and its building process, the GPR profiles included in the dataset are presented and commented on. Overall, 67 profiles were recorded along eleven parallel lines crossing the test site in the transverse direction; three pulsed radar systems were used to perform the measurements, manufactured by different producers and equipped with various antennas having central frequencies from 200 MHz to 900 MHz. An archive containing all profiles (raw data) is enclosed to this paper as supplementary material. This dataset is the core part of the Open Database of Radargrams initiative of COST (European Cooperation in Science and Technology) Action TU1208 "Civil engineering applications of Ground Penetrating Radar". The idea beyond such initiative is to share with the scientific community a selection of interesting and reliable GPR responses, to enable an effective benchmark for direct and inverse electromagnetic approaches, imaging methods and signal processing algorithms. We hope that the dataset presented in this paper will be enriched by the contributions of further users in the future, who will visit the test site and acquire new data with their GPR systems. Moreover, we hope that the dataset will be made alive by researchers who will perform advanced analyses of the profiles, measure the electromagnetic characteristics of the host materials, contribute with synthetic radargrams obtained by modeling the site with electromagnetic simulators, and more in general share results achieved by applying their techniques on the available profiles.

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Interference Mitigation Achieved with a Reconfigurable Stepped Frequency GPR System

Cited by 9 publications

References 17 publications

Railway Track Condition Assessment at Network Level by Frequency Domain Analysis of GPR Data

Railway Track Condition Assessment at Network Level by Frequency Domain Analysis of GPR Data

Real-time visualization of the data gathered by a reconfigurable stepped-frequency GPR system

TU1208 Open Database of Radargrams: The Dataset of the IFSTTAR Geophysical Test Site

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