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Monitoring and Protection of Critical Infrastructure by Unmanned Systems
The attention of many developed countries has increasingly focused on the security and protection of critical infrastructure. The use of Unmanned Systems (USs) for this purpose has been growing rapidly in recent years, as advances in technology, increased versatility and smaller size, together with the reduced risks and costs associated with removing the need for a pilot or operator on board, have all made these systems more attractive. This book, Monitoring and Protection of Critical Infrastructure by Unmanned Systems, presents 15 papers delivered at the NATO Advanced Training Course (ATC) of the same name hosted in Chisinau, the Republic of Moldova, from 30 May to 5 June 2022. This event w...
Ground Penetrating Radar
This book offers an overview of modern advances in Ground Penetrating Radar (GPR) for the reader hoping to understand comprehensive electromagnetic culture, combining instrumental development of radar, signal processing, imaging, and calibration/correction of measured data. GPR has a multi-disciplinary character that can bring together a diverse and broad community. Of concern are the design and optimization of innovative radars, by virtue of the antennas and associated electronics, imaging algorithms, methodological diversity, calibration procedures, and the development of tools for the interpretation of data in mono-static or multi-static configurations within frequency or transient domains. This book provides illustrations in civil engineering for the diagnosis of transport infrastructures and buildings, archeological surveys for the appreciation of cultural heritage, detection of underground pipes and cavities, estimation of soil water content for agriculture, and mapping of root trees developing underground, and in planetology, the analysis of the internal structure of planets and other celestial bodies through electromagnetic waves.
Non-Destructive Testing
Non-destructive testing (NDT) is based on inspection methodologies that do not require the change or destruction of the component or system under evaluation. Numerous NDT techniques are increasingly used, thanks to the recent advances in sensing technologies, data acquisition, data storage and signal processing. Inspection information is widely employed in order to make effective maintenance decisions based on the defects identified, their location and severity. This book presents the main advances recently made on different NDT techniques, together with the principal approaches employed to process the signals obtained during inspection.
Experimental Vibration Analysis for Civil Engineering Structures
This volume presents peer-reviewed contributions from the 10th International Conference on Experimental Vibration Analysis for Civil Engineering Structures (EVACES), held in Milan, Italy on August 30-September 1, 2023. The event brought together engineers, scientists, researchers, and practitioners, providing a forum for discussing and disseminating the latest developments and achievements in all major aspects of dynamic testing for civil engineering structures, including instrumentation, sources of excitation, data analysis, system identification, monitoring and condition assessment, in-situ and laboratory experiments, codes and standards, and vibration mitigation. The topics included but were not limited to: damage identification and structural health monitoring; testing, sensing and modeling; vibration isolation and control; system and model identification; coupled dynamical systems (including human–structure, vehicle–structure, and soil–structure interaction); and application of advanced techniques involving the Internet of Things, robot, UAV, big data and artificial intelligence.
8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements
This book presents the latest advances in research to analyze mechanical damage and its detection in multilayer systems. The contents are linked to the Rilem TC241 - MCD scientific activities and the proceedings of the 8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements (MCD2016). MCD2016 was hosted by Ifsttar and took place in Nantes, France, on June 7-9, 2016. In their lifetime, pavements undergo degradation due to different mechanisms of which cracking is among the most important ones. The damage and the fracture behavior of all its material layers as well as interfaces must be understood. In that field, the research activities aims to develop a deeper fundamental understanding of the mechanisms responsible for cracking and debonding in asphalt concrete and composite (e.g. asphalt overlays placed on PCC or thin cement concrete overlay placed on asphalt layer) pavement systems.
Proceedings of the 10th International Operational Modal Analysis Conference
This volume gathers the latest advances and innovations in the field of operational modal analysis and structural health monitoring, as presented at the 10th International Operational Modal Analysis Conference (IOMAC), held in Naples, Italy on May 22-24, 2024. The contributions cover a diverse range of topics, including AI for data interpretation, automatic modal parameter estimation, Digital Twin, modal testing methods, instrumentation and case studies, model correlation and updating, modal-based SHM, modal mass estimation. Selected by means of a rigorous peer-review process, they will spur novel research directions and foster future multidisciplinary collaborations.
SAR Temporal Series Interpretation and Backscattering Modelling for Maize Growth Monitoring
The research objective is to develop a methodology for the extraction of bio- and geophysical variables from Synthetic Aperture Radars (SAR) and for their use in the perspective of maize monitoring in an operational context. SARs interest agronomists because they present some advantages for vegetation monitoring. However, the actual revisit cycle of SARs is not sufficient for crop monitoring. The image processing chain we developed overcomes this issue and meets the 4 requirements for operational crop monitoring: a high temporal resolution, a high geometric accuracy, a short processing time and the preservation of the signal content. From the literature, we know that the interactions between...
Chapitre 6 - Évaluation des chaussées flexibles par GPR : 20 ans de R&D en France
Ce chapitre présente 20 ans de R&D en France sur l'évaluation des chaussées flexibles par GPR. Il analyse l'état de l'art des inspections routières, détaille les systèmes GPR et leur acquisition, puis aborde le traitement et l'interprétation des données. De nouvelles approches sont proposées pour améliorer les évaluations, notamment des algorithmes de retard temporel à haute résolution. Le potentiel de l'inversion de forme d'onde complète et du radar à synthèse d'ouverture tomographique est également souligné. Mots-clés : contrôle des chaussées flexibles, diagnostic rapide, algorithmes de retard temporel à haute résolution, radar à synthèse d'ouverture. DOI : 10.51926/ISTE.9157.ch6
Radar à pénétration de sol
Cet ouvrage propose une vue d’ensemble des avancées modernes en radar à pénétration de sol (GPR), technologie de nature pluridisciplinaire rassemblant une communauté aussi vaste que diverse. Il traite de la conception et l’optimisation de radars innovants grâce aux antennes et à l’électronique associée, aux algorithmes d’imagerie, à la diversité méthodologique, aux procédures de calibration et au développement d’outils pour l’interprétation des données dans des configurations mono ou multistatiques dans les domaines fréquentiel ou transitoire. Radar à pénétration de sol présente des illustrations en génie civil pour le diagnostic des infrastructures de transport et des bâtiments, des relevés archéologiques pour la valorisation du patrimoine culturel, la détection de tuyaux et de cavités souterrains, l’estimation de la teneur en eau du sol pour l’agriculture, et la cartographie des racines souterraines des arbres. En planétologie, l’analyse de la structure interne des planètes et d’autres corps célestes à l’aide d’ondes électromagnétiques est également menée.
