Littérature scientifique sur le sujet « Systèmes de localisation en temps réel (RTLS) »
Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres
Sommaire
Consultez les listes thématiques d’articles de revues, de livres, de thèses, de rapports de conférences et d’autres sources académiques sur le sujet « Systèmes de localisation en temps réel (RTLS) ».
À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.
Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.
Thèses sur le sujet "Systèmes de localisation en temps réel (RTLS)"
Abid, Mohamed Amine. « Systèmes de localisation en temps réel basés sur les réseaux de communication sans fil ». Thèse, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/8820.
Texte intégralBarbosa, Nogueira Evanaska Maria. « Conception d'un système d'antennes pour la localisation en temps réel avec réseau de capteurs sans fils ». Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00981583.
Texte intégralBenouakta, Amina. « Conception de systèmes antennaires pour applications de supervision et de localisation dans l'Internet des objets industriel ». Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ4011.
Texte intégralThis thesis is part of the concept of the Internet of Things (IoT), object identification, and traceability in so-called complex environments through Ultra-Wide Band (UWB) technology known for its high temporal precision. The objective is to contribute to the advancement of real-time UWB-based localization systems through the design and optimization of UWB antennas that are reconfigurable, multi-standards, and multi-functions. Therefore, any localization system integrating the optimized antennas will have improved localization quality and new functionalities.The main contributions developed in this thesis involve enhancements to real-time localization systems (RTLS) based on UWB technology: design and fabrication of frequency reconfigurable UWB antennas; design and fabrication of a multi-standard localization electronic board (UWB and Long Range - LoRa); experimental study of RTLS systems incorporating the designed antennas and validation of the evolution of the localization in terms of extended reading ranges, detectability of objects without prior knowledge of their orientations, and improved location accuracy through the attenuation of multi-path signals
Marsit, Nadhem. « Traitement des requêtes dépendant de la localisation avec des contraintes de temps réel ». Toulouse 3, 2007. http://thesesups.ups-tlse.fr/106/.
Texte intégralIn last years, the mobility of units achieved an increasing development. One of the direct consequences in the database field is the appearance of new types of queries such as Location Dependent Queries (LDQ) (e. G. An ambulance driver asks for the closest hospital). These queries raise problems which have been considered by several researches. Despite the intensive work related to this field, the different types of queries studied so far do not meet all the needs of location based applications. In fact these works don’t take into account the real time aspect required by certain location based applications. These new requirements generate new types of queries such as mobile queries with real time constraints. Taking into account mobility and real time constraints is an important problem to deal with. Hence, our main objective is to propose a solution for considering real time constraints while location dependent query processing. First, we propose a language for expressing different type of queries. Then, we design a software architecture allowing to process location dependent queries with real time constraints. The modules of this architecture are designed to be implemented on top of existent DBMS (e. G. Oracle). We propose methods to take into account location of mobile client and his displacement after sending the query. We also propose methods in order to maximise the percentage of queries respecting their deadlines. Finally we validate our proposal by implementing the proposed methods and evaluating their performance
Abramik, Stanisław. « Base de connaissance des défauts des systèmes électriques pour systèmes experts : contribution à l'étude du diagnostic de défaillance des convertisseurs statiques en temps réel ». Toulouse, INPT, 2003. http://www.theses.fr/2003INPT030H.
Texte intégralMeilland, Maxime. « Cartographie RGB-D dense pour la localisation visuelle temps-réel et la navigation autonome ». Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2012. http://tel.archives-ouvertes.fr/tel-00686803.
Texte intégralRullan, Lara José Luis. « Conception et implantation embarquée d'un système de localisation en utilisant les signaux radio pour la stabilisation d'un mini drone ». Compiègne, 2011. http://www.theses.fr/2011COMP1984.
Texte intégralThe Unmanned Aerial Vehicles are complex and difficult dynamic systems to control. In spite of the efforts realized on the stabilization approaches (nested saturation, back-stepping, etc. ), the control laws have been always focused to stabilize the orientation of the vehicle and few works has been developed to estimate its position. Since real measurements are noisy and are not directly observable or measurable from the sensors, the estimation of the position is a difficult problem to resolve. Numerous approaches have been proposed for position’s estimation. In particular, vision and GPS have been explored in indoor and outdoor, respectively. However, there remain many challenges to its application in UAVs. This dissertation presents a solution to the problem of location of UAV indoor using radio signals. The k-nearest neighbor (KNN) algorithm, the least squares algorithm and the Extended Kalman filter have been tested and validated in real time. The performances of the algorithms were validated during hover flight and path following flight of a mini helicopter. In order to validate the algorithms, I developed a mini helicopter with four rotors (quad rotor) with the computer architecture for implementing onboard embedded control laws for its stability and for the implementation of localization tasks
Picard, Quentin. « Proposition de mécanismes d'optimisation des données pour la perception temps-réel dans un système embarqué hétérogène ». Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASG039.
Texte intégralThe development of autonomous systems has an increasing need for perception of the environment in embedded systems. Autonomous cars, drones, mixed reality devices have limited form factor and a restricted budget of power consumption for real-time performances. For instance, those use cases have a budget in the range of 300W-10W, 15W-10W and 10W-10mW respectively. This thesis is focused on autonomous and mobile systems with a budget of 10mW to 15W with the use of imager sensors and the inertial measurement unit (IMU). Simultaneous Localization And Mapping (SLAM) provides accurate and robust perception of the environment in real-time without prior knowledge for autonomous and mobile systems. The thesis aims at the real-time execution of the whole SLAM system composed of advanced perception functions, from localization to 3D reconstruction, with restricted hardware resources. In this context, two main questions are raised to answer the challenges of the literature. How to reduce the resource requirements of advanced perception functions? What is the SLAM pipeline partitioning for the heterogeneous system that integrates several computing units, from the embedded chip in the imager, to the near-sensor processing (FPGA) and in the embedded platform (ARM, embedded GPU)?. The first issue addressed in the thesis is about the need to reduce the hardware resources used by the SLAM pipeline, from the sensor output to the 3D reconstruction. In this regard, the work described in the manuscript provides two main contributions. The first one presents the processing in the embedded chip with an impact on the image characteristics by reducing the dynamic range. The second has an impact on the management of the image flow injected in the SLAM pipeline with a near-sensor processing. The first contribution aims at reducing the memory footprint of the SLAM algorithms with the evaluation of the pixel dynamic reduction on the accuracy and robustness of real-time localization and 3D reconstruction. The experiments show that we can reduce the input data up to 75% corresponding to 2 bits per pixel while maintaining a similar accuracy than the baseline 8 bits per pixel. Those results have been obtained with the evaluation of the accuracy and robustness of four SLAM algorithms on two databases. The second contribution aims at reducing the amount of data injected in SLAM with a decimation strategy to control the input frame rate, called the adaptive filtering. Data are initially injected in constant rate (20 frames per second). This implies a consumption of energy, memory, bandwidth and increases the complexity of calculation. Can we reduce this amount of data ? In SLAM, the accuracy and the number of operations depend on the movement of the system. With the linear and angular accelerations from the IMU, data are injected based on the movement of the system. Those key images are injected with the adaptive filtering approach (AF). Although the results depend on the difficulty of the chosen database, the experiments describe that the AF allows the decimation of up to 80% of the images while maintaining low localization and reconstruction errors similar to the baseline. This study shows that in the embedded context, the peak memory consumption is reduced up to 92%
Birem, Merwan. « Localisation et détection de fermeture de boucle basées saillance visuelle : algorithmes et architectures matérielles ». Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22558/document.
Texte intégralIn several tasks of robotics, vision is considered to be the essential element by which the perception of the environment or the interaction with other users can be realized. However, the potential artifacts in the captured images make the task of recognition and interpretation of the visual information extremely complicated. It is therefore very important to use robust, stable and high repeatability rate primitives to achieve good performance. This thesis deals with the problems of localization and loop closure detection for a mobile robot using visual saliency. The results in terms of accuracy and efficiency of localization and closure detection applications are evaluated and compared to the results obtained with the approaches provided in literature, both applied on different sequences of images acquired in outdoor environnement. The main drawback with the models proposed for the extraction of salient regions is their computational complexity, which leads to significant processing time. To obtain a real-time processing, we present in this thesis also the implementation of the salient region detector on the reconfigurable platform DreamCam
Karam, Nadir. « Agrégation de données décentralisées pour la localisation multi-véhicules ». Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2009. http://tel.archives-ouvertes.fr/tel-00724489.
Texte intégral