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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Wireless Control of Industrial Robot

Paulsson, Johan January 2020 (has links)
The purpose of this project was to investigate if it is possible to have local wireless control of an industrial robot. This was achieved by first doing a diversity of research. Based on the research, the project was conceptualized and a real-life product was developed showcasing the functionality. The standard robot set up as of today consists of three main parts: A robot, a control unit and a handheld controller device, called Teach Pendant. All of these parts are connected with long aggravating cables. The cables cause inconvenience and can in some cases introduce unnecessary risks in the factory. Can this hardware be removed, and an overall more convenient use case be developed? The product was developed by programming an application on a Windows tablet. Further, a Bluetooth Low Energy server was created to handle the communication between the tablet and the robot control unit. The final product consisted of a tablet, a single-board computer, a robot and a control unit. The tablet is what replaces the Teach Pendant as a handheld device. The tablet is connected to the singleboard computer via Bluetooth. The single-board computer acts as a Bluetooth server and sends out advertisements for the tablet to detect. When the tablet detects a nearby robot it can then connect to it and send start and stop commands. The server then forwards it to the control unit which finally sends the data to the robot control unit to execute. The project shows that it is possible to develop wireless robot control. It showcases a potential solution on how one could set it up. However, the final product developed had a simple functionality compared to the wired Teach Pendant. To manage the same capacity as the wired Teach Pendent, further development is required.
12

The use of Bluetooth Low Energy Technology for Cost-Effective Construction Equipment Tracking

Mukhtar, Muhammad Hamza 23 August 2022 (has links)
No description available.
13

A SYSTEMATIC FRAMEWORK FOR ANALYZING THE SECURITY AND PRIVACY OF WIRELESS COMMUNICATION PROTOCOL IMPLEMENTATIONS

Imtiaz Karim (14827771) 24 March 2023 (has links)
<p> Wireless communication technologies, such as cellular ones, Bluetooth, and WiFi, are fundamental for today’s and tomorrow’s communication infrastructure. Networks based on those technologies are or will be increasingly deployed in many critical domains, such as critical infrastructures, smart cities, healthcare, and industrial environments. Protecting wireless networks against attacks and privacy breaches is thus critical. A fundamental step for the security and privacy of these networks is ensuring that their protocols are implemented as mandated by the standards. These protocols are however quite complex and unfortunately, the lack of secure-by-design approaches for these complex protocols often induces vulnerabilities in implementations with severe security and privacy repercussions. For these protocols, the standards are thousands of pages long, written in natural language, describe the high-level interaction of the protocol entities, and most often depend on human interpretation—which is open to misunderstanding and ambiguity. This inherently entails the question of whether these wireless protocols and their communication equipment implement the corresponding standards correctly or whether the implementations introduce vulnerabilities that can have severe consequences.</p>
14

Evaluation of Bluetooth Low Energy in Agriculture Environments

Bjarnason, Jonathan January 2017 (has links)
The Internet of Things (IoT) is an umbrella term for smart things connected to the Internet.Precision agriculture is a related concept where connected sensors can be used to facilitate, e.g. more effective farming. At the same time, Bluetooth has been making advancements into IoT with the release of Bluetooth Low Energy (BLE) or Bluetooth smart as it is also known by. This thesis describes the development of a Bluetooth Low Energy moisture- and temperature sensor intended for use in an agricultural wireless sensor network system. The sensor was evaluated based on its effectiveness in agricultural environments and conditions such as weather, elevation and in different crop fields. Bluetooth Low Energy was chosen as the technology for communication by the supervising company due to its inherent support for mobile phone accessibility.Field tests showed that the sensor nodes were largely affected by greenery positioned betweentransmitter and receiver, meaning that these would preferably be placed above growing crops foreffective communication. With ideal placement of the sensor and receiving unit, the signal wouldreach up to 100 m, meaning that a receiving unit would cover a circle area with radius 100 m.Due to Bluetooth being largely integrated in mobile devices it would mean that sensor data couldeasily be made accessible with a mobile app, rather than acquiring data from an online web server.
15

LEMoNet: Low Energy Wireless Sensor Network Design for Data Center Monitoring

Li, Chenhe Jr 08 1900 (has links)
Today’s data centers (DCs) consume up to 3% of the energy produced worldwide, much of which is wasted due to over-cooling and underutilization of IT equipment. This wastage in part stems from the lack of real-time visibility of fine-grained thermal distribution in DCs. Wireless sensing is an ideal candidate for DC monitoring as it is cost-effective, facility-friendly, and can be easily re-purposed. In this thesis, we develop LEMoNet, a novel low-energy wireless sensor network design for monitoring co-location DCs. It employs a two-tier network architecture and a multi-mode data exchange protocol to balance the trade-offs between low power consumption and high data reliability. We have evaluated the performance of LEMoNet by deploying custom-designed sensor and gateway nodes in a SHARCNET DC at A.N. Bourns Science Building. We show experimentally that LEMoNet achieves an average data yield of over 98%. Under normal operations with one temperature and one humidity reading every thirty seconds, the battery lifetime of LEMoNet sensor nodes is projected to be 14.9 years on a single lithium coin battery. / Thesis / Master of Science (MSc)
16

Sensorbaserad skosula : Utveckling av prototyp för uppföljning efter behandling av idiopatisk tågång / Sensor-based insole : Development of prototype for evaluation of post treatment for idiopathic toe walking

Liljedahl, Hampus, Persson, Arvid January 2019 (has links)
Denna rapport behandlar konstruktionen av en sensorbaserad skosula. Skosulan designades med en mängd trycksensorer som sedan visualiseras på en mobilapplikation. Mobilapplikationen anslöts till sulan via Bluetooth. Det är vanligt att majoriteten av små barn går på tå. Ifall barnet inte slutar gå på tå efter barnet fyllt 2–3 år bör man kontakta läkare. Det finns olika teorier angående vilken typ av behandling som är bäst för barnen. I dagsläget finns det ingen bra lösning för att följa upp behandlingarna på barnen. Prototypen är designad för att uppfylla de krav som behövs för att ge en bra bedömning ifall behandlingen som barnet fått förbättrat barnets belastning på foten. Rapporten går även in på andra användningsområden som sulan skulle kunna användas inom. Slutsatsen i rapporten är att utveckling av produkten är möjlig men kräver mer forskning inom området samt vidareutveckling av prototypen. Prototypen är i för tidigt stadie för att utföra riktiga tester på en försöksgrupp. För att validera sensorernas precision bör lämpliga testfall utvecklas. / This report goes through the development of a sensor-based insole. The insole was designed with multiple pressure sensors which are then visualized on a mobile application. The mobile application was connected to the insole via Bluetooth. It is common for toddlers to prefer toe walking. If the child does not stop toe walking after the age of 2-3 years, you should contact a doctor. There are different kinds of treatment for these children. Today there isn’t a good solution to evaluate the children post treatment. The prototype is designed to meet the requirements needed to give a good assessment of whether the child has improved or not. The report also addresses other use cases for the insole. The conclusion on the report is that development of the product is possible but requires more research in the field as well as further development of the prototype. The prototype is in a too early stage to perform true tests on a trial group. To validate the sensor's precision, appropriate test cases should be developed.
17

Design och utvärdering av programvara för en Bluetoothkommunicerande lågenergienhet

Larsson, Ante, Fölster, Niclas January 2020 (has links)
Syftet med projektet var att utveckla en programvara för ett strömsnålt smartarmband som kommunicerar med sin användare på ett nytt sätt, via vibrationer i morsekod. Programvaran använder sig av Bluetoothteknik för att skicka och ta emot information i realtid från en smartphone-applikation. Kravet var att programvaran inte bara ska fungera utan även uppnå en viss standard. Standarden var definierad av en kravspecifikation och ett antal mål; robusthet, prestanda, energieffektivitet, begriplighet och förvaltningsbarhet. Allt detta krävdes för att programvaran skulle vara tillräckligt funktionell för att kunna användas i verkligheten.Den utvecklade programvaran har i huvudsak tre delar;    En som styr Bluetoothkommunikationen mellan systemet och smartphone-applikation.    En som hanterar knapptryckningarna på armbandet.    En som styr armbandets vibrationsmotorer.    För att bestämma vilken programstruktur som bäst skulle uppfylla kraven utvärderades flera olika ramverk systematiskt. Av dessa valdes det ramverk bäst lämpad för de uppsatta målen. Systemet använder ett realtidsoperativsystem som ger en stabil grund och hanterar alla uppgifter på ett smidigt sätt. Det är dessutom väletablerat och dokumenterat, vilket förenklade utvecklingen. För att validera att programvaran uppnått målen utfördes flertalet anpassade tester.    Projektet resulterade i en fullt fungerade programvara som uppfyllde uppsatta mål. Några viktiga lärdomar som har dragits av detta projekt är bland annat att satsningen på test-fokuserad evaluering har varit ett mycket lyckat val. Det har resulterat i att det är lätt och tydligt att se om kraven som ställts har uppnåtts. En annan del som har varit till stor hjälp är de avgränsningar som lagts på projektet. Att ha satt tydliga mål och specificerat att andra icke-relevanta aspekter är utanför ramarna av projektet har varit en stor fördel. / The purpose of this project was to develop a firmware for a low-energy smartwristband that communicates with the user in a new way through vibrations in Morse-code. It uses Bluetooth technology to send and receive information in real-time, from a smartphone application. The firmware did not only have to be functional, it had to reach a certain standard as well. This standard was defined by a set of goals: robustness, performance, power efficiency, comprehensibility and maintainability. All these are required for the program to be viable in practice.    The firmware has three main parts:    One which controls Bluetooth communication between the system and the smartphone application.    One that handles the button presses on the wristband.    One that controls the vibration motors on the wristband.To find the right structure for the firmware, several different frameworks were systematically evaluated with the requirements in mind. The system uses a realtime operating system which provides a strong foundation and handles all tasks in an easily manageable way. It is also well established and documented, which facilitated development. Several tests were performed to validate goal achievement.The project resulted in a fully functioning firmware which fulfilled the set goals. Some important lessons that was taught from this project is firstly that the focus on test-based evaluation was a very good choice. It makes it very clear and easy to see if requirements were fulfilled. Another part which has helped a lot was the delimitations set on the project. To specify the scope has been very important part of the projects success.
18

Physical Tracking : menaces, performances et applications. / No English title available

Issoufaly, Taher 28 January 2019 (has links)
La récente émergence des smartphones et des objets connectés a révolutionné le mode de vie des utilisateurs. Ces dispositifs ubiquitaires et équipés de plusieurs interfaces sans fil de communication, sont rapidement devenus indispensables dans la vie quotidienne des utilisateurs avec une utilisation intensive. Les interfaces sans fil de ces objets connectés émettent périodiquement des informations, certaines sont spécifiques aux utilisateurs et permettent par effet de bord d’identifier et de suivre leur déplacements. Le suivi des utilisateurs via les informations fortuitement émises par leurs périphériques sans fil se nomme le Wireless Physical Tracking. Les possibilités offertes par le Wireless Physical Tracking ont suscité un fort intérêt. Plusieurs applications se sont développés et ont permis d’apporter de l’innovation dans plusieurs domaines. Des sociétés de marketing l’utilisent afin de proposer à leurs clients de la publicité ciblée en fonction de leurs parcours dans leur zone d’activité. À une échelle plus grande, les villes intelligentes, ou smart-cities analysent le mouvement des utilisateurs afin d’apporter des services pour le confort des habitants. Enfin, dans le domaine de la recherche, les réseaux Ad-Hoc mobiles et autres DTN nécessitent de s’intéresser à cette pratique car l’étude de la mobilité des utilisateurs représentent un élément clé pour améliorer les performances de ce type de réseau. Cependant, la collecte de ces informations sans le consentement des utilisateurs ou sans qu’elles soient correctement protégées représentent un risque réel pour leur vie privée. C’est autour de ce contexte que s’articule cette thèse divisée en deux parties. La première présente les technologies PAN et WAN, l’état de l’art des méthodes de Wireless Physical Tracking et les contre mesures adoptés. La deuxième partie présentent les contributions de la thèse qui visent à proposer de nouvelles méthodes de suivi, analyser les performances de celles-ci face aux méthodes existantes et dans le cas particulier de l’application de crowd-localisation, à proposer des méthodes de suivi respectueuse de la vie privée. / The recent rise of smart-phones and connected objects has a deep impact its users lifestyle. In 2017, more than a billion and a half smart-phones were sold around the world. These ubiquitous devices, equipped with several wireless communication interfaces, have quickly become essential in the daily life of users with an intensive use. The wireless interfaces of these connected objects periodically transmit information on the network, some of which are user-specific and allow to identify and track their mobility. Tracking users by collecting the information generated by their wireless devices is called Wireless Physical Tracking. The opportunities offered by the Wireless Physical Tracking raised a lot of interest. Several applications have been developed and have brought innovation in several areas. Marketing companies use it to offer to their customers targeted advertising based on their movements in their area of activity. On a larger scale, Smart Cities or smart-cities analyse the movement of users in order to provide services for their inhabitants. Finally, in the field of research in mobile Ad-Hoc networks and DTNs, users mobility is a key element which need to be collected and analysed. However, the collection of this information without the consent of the users or without being properly protected induce a real risk to their privacy. It is around this context that this thesis is focused on. It’s divided into two parts. The first presents the PAN and WAN technologies, the state of the art of Wireless Physical Tracking methods and the adopted counter measures. The second part presents the contributions of the thesis which aims at developing new methods for Physical Tracking and analysing their performances compared to the existing methods. We first present an evaluate BPM, a bluetooth passive monitoring that allows to track the users of Classic Bluetooth device with a detection delay significantly lower than the methods previously used. We then focus on Bluetooth Low Energy and propose the use of a BLEB, a botnet of users tracking BLE objects with their smart-phones. Finally, we also focus on preserving users privacy through the proposal of PPCL, a privacy preserving crowdlocalisation method which allow to track users assets without being trackable.
19

Implementation av en metod för prestandamätning av sensorkommunikation med Bluetooth low energy / Implementation of a Performance Monitoring Method of Sensor Communication with Bluetooth Low Energy

Andersson, Marcus January 2016 (has links)
Internet of Things utvecklas och växer konstant. Det blir allt vanligare att applikationer och enheter kopplas samman via nätverk. En av teknikerna som används för att trådlöst sammankoppla enheter är Bluetooth Low Energy. Preferenser för kvaliteten i en kommunikation kan variera. Det är därför viktigt att utföra prestandamätningar för att veta vilka fördelar och nackdelar en nätverksteknik har.  Detta examensarbete handlar om prestandamätningar vid datasändningar mellan mobila enheter och trådlösa sensorer, och övervakning av parametrar som fås under mätningarna. En metod med monitoreringspaket inspirerad från tidigare forskning, utformades och implementerades i ett system för Bluetooth Low Energy, vilken därefter har utvärderats.  Resultatet blev att två system skapades som visade dataförluster, fördröjningsvariation och genomströmning, löpande på en mobil enhet. Det ena systemet använde metoden med monitoreringspaket. Det andra systemet använde en egengjord metod som gjorde mätningar med hög precision, men som ställde högre krav på funktioner och prestanda på sensornoden, och på den mobila enheten. Experiment med hjälp av systemen utfördes och resulterande värden analyserades. / Internet of Things develops and grows constantly. It becomes increasingly common that applications and units are connected through a network. One of the technologies used for wirelessly linking together units is Bluetooth Low Energy. Preferences for the quality of a connection can vary. It is therefore important to conduct measurements of performance in order to know advantages and disadvantages that a networking technology has.  This thesis is about measurements of performance during data transfers between mobile devices and wireless sensors, as well as monitoring parameters that are given during the measurements. One method using monitoring packets inspired from previously made research, were designed and implemented in a system for Bluetooth Low Energy, which was then evaluated. The result was that two systems were created that presented data loss, delay variation and throughput, continuously on a mobile device. One system used the method with monitoring packets. The other system used a self-made method which made measurements with high precision, but that places higher demands on functions and performance of the sensor node, and on the mobile device. Experiments were conducted by using the systems and resulting values were analyzed.
20

Advanced Hardened Registration Process for Mobile Crowd Sensing / Avancerad Härdad registreringsprocess för Mobile Crowd Sensing

Li, Ronghua January 2022 (has links)
Mobile Crowd Sensing (MCS) or Participatory Sensing (PS) are two emerging systems as smart mobile devices become ubiquitous. One of the advantages of such a sensing system is that almost anyone with a mobile device can become a moving "sensor". However, despite the convenience, the openness of such systems is a double-edged sword: participants can misbehave and pose a threat. Usually, current MCS or PS systems are relatively weak and lack effective data sources selection mechanisms. As a result, fake or forged data can be collected, representing wrongly the sensed conditions on the surroundings, i.e. noise, moisture, etc. Therefore, a Hardened Registration Process (HRP) is proposed to provide a pre-examination on participants that are chosen to collect sensing data. There is one previous work on such a topic. It targets device examination (root, emulator, bot-net detection, etc.) for Android devices, preventing attackers from managing to register not actual but emulated devices and thus manage to effectively manipulate the collected data. The focus of this project is on enhancing the previous work and extending it with complementary mechanisms. We proposed a two-step HRP process, comprising a client detection for identifying malicious devices and server-side detection for revealing Sybil devices. We improve the previous HRP by implementing detection mechanisms in C (native) code and such an enhanced device examination process is the first step: client detection. In addition, to detect adversaries that can bypass the client detection method, we proposed an additional server-side detection to eliminate emulators and Sybil devices, adopting peer-to-peer interaction with Bluetooth Low Energy to corroborate the physical presence of the registered devices. With this enhancement, we achieve higher detection performance. Adversaries cannot easily bypass the client-side detection with rooted or emulated devices. Moreover, even if some adversaries can bypass the client-side detection, the server-side detection can prevent adversaries from registering Sybil devices more than the number of devices they own. / Mobile Crowd Sensing (MCS) eller Participatory Sensing (PS) är två framväxande system när smarta mobila enheter blir allestädes närvarande. En av fördelarna med ett sådant avkänningssystem är att nästan alla med en mobil enhet kan bli en rörlig sensor". Men trots bekvämligheten är öppenheten i sådana system ett tveeggat svärd: deltagare kan missköta sig och utgöra ett hot. Vanligtvis är nuvarande MCS- eller PS-system relativt svaga och saknar effektiva valmekanismer för datakällor. Som ett resultat kan falska eller förfalskade data samlas in, som felaktigt representerar de avkända förhållandena i omgivningen, d.v.s. buller, fukt, etc. Därför föreslås en förstärkt registreringsprocess för att ge en förundersökning av deltagare som väljs för att samla in avkänningsdata. Det finns ett tidigare arbete om ett sådant ämne. Det är inriktat på enhetsundersökning (root, emulator, bot-net-detektion, etc.) för Android-enheter, vilket förhindrar angripare från att lyckas registrera inte faktiska utan emulerade enheter och på så sätt lyckas effektivt manipulera den insamlade informationen. Fokus för detta projekt ligger på att förbättra det tidigare arbetet och utöka det med kompletterande mekanismer. Vi föreslog en tvåstegs HRP-process, som omfattar en klientdetektering för att identifiera skadliga enheter och detektering på serversidan för att avslöja Sybil-enheter. Vi förbättrar den tidigare HRP genom att implementera detekteringsmekanismer i C (native) kod och en sådan förbättrad enhetsundersökningsprocess är det första steget: klientdetektering. Dessutom, för att upptäcka motståndare som kan kringgå klientdetekteringsmetoden, föreslog vi en extra detektering på serversidan för att eliminera emulatorer och Sybil-enheter, genom att använda peer-to-peer-interaktion med Bluetooth Low Energy för att bekräfta den fysiska närvaron av de registrerade enheterna. Med denna förbättring uppnår vi högre detektionsprestanda. Motståndare kan inte lätt kringgå upptäckten på klientsidan med rotade eller emulerade enheter. Dessutom, även om vissa motståndare kan kringgå upptäckten på klientsidan, kan detekteringen på serversidan förhindra att motståndarna registrerar Sybil-enheter mer än antalet enheter de äger.

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