Refine
Year of publication
- 2014 (107) (remove)
Document Type
- Conference Proceeding (50)
- Article (unreviewed) (31)
- Article (reviewed) (17)
- Book (5)
- Part of a Book (3)
- Bachelor Thesis (1)
Conference Type
- Konferenzartikel (31)
- Konferenz-Abstract (10)
- Konferenzband (5)
- Konferenz-Poster (2)
- Sonstiges (2)
Keywords
- Intelligentes Stromnetz (4)
- Kommunikation (4)
- E-Learning (3)
- Elektrolyt (3)
- Herzkrankheit (3)
- Lithiumbatterie (3)
- Mathematik (3)
- Positronen-Emissions-Tomografie (3)
- RoboCup (3)
- SPECT (3)
- Software (3)
- Algorithmus (2)
- Desktop-Virtualisierung (2)
- E-learning (2)
- Elektrochemie (2)
- Katheter (2)
- Kinetik (2)
- Medizingeschichte (2)
- Mikroelektronik (2)
- Nervenheilkunde (2)
- Optik (2)
- e-learning (2)
- standardization (2)
- 3D displays (1)
- 3D modeling (1)
- 3D printing (1)
- Abbreviate Injury Scale (1)
- Absatz (1)
- Accident Analysis (1)
- Advanced Driver Assistance System (1)
- Air Traffic Control (1)
- Anomalie (1)
- Antenne (1)
- Applikation (1)
- Arzneimittelrecht (1)
- Atlantikum (1)
- Augmented-Reality (1)
- Austausch (1)
- Automation (1)
- BACnet (1)
- Batterie (1)
- Benchmark (1)
- Bioelement (1)
- Bruckner, Anton (1)
- Car-2-Car communication (1)
- Car-2-X communication (1)
- Car-to-Car-(C2C)-Communication (1)
- Collision Point (1)
- Computersysteme (1)
- Cyber Physical Systems, (1)
- DDS (1)
- Data Distribution Service (1)
- Data communications (1)
- Data modeling (1)
- Databases (1)
- Datenbanksystem (1)
- Datenerfassung (1)
- Digitaltechnik (1)
- Drahtloses lokales Netz (1)
- Effizienz (1)
- Eisen (1)
- Elastische Welle (1)
- Elastizität (1)
- Elektrofahrzeug (1)
- Engine (1)
- Enhanced Security (1)
- Epilepsie (1)
- Erweitere Realität (1)
- Erziehung (1)
- Fehler (1)
- Formale Beschreibung (1)
- Forschung (1)
- Friedrich II (1)
- Funktechnik (1)
- Gebäudeleittechnik (1)
- Halswirbelsäule (1)
- Hand (1)
- Heilkunde (1)
- Herz (1)
- Hochschule (1)
- Hybridtechnik (1)
- Härten (1)
- IEEE802.11p/WAVE (1)
- Ingenieurausbildung (1)
- Integrierte Schaltung (1)
- Internet (1)
- Internet der Dinge (1)
- Internet of Things (1)
- Java <Programmiersprache> (1)
- Kalibrieren (1)
- Katalyse (1)
- Kathode (1)
- Keil (1)
- Keilwelle (1)
- Kernspintomografie (1)
- Kleintiere (1)
- Kommunikationsprotokoll (1)
- Kontrolltheorie (1)
- Korea (1)
- Krankheit (1)
- Labor (1)
- Langfristige Korrelation (1)
- Laser (1)
- Leistungselektronik (1)
- Lithium-Ionen-Akkumulator (1)
- Lokalisation (1)
- Machine-to- Machine-(M2M)-Communication (1)
- Medizin (1)
- Medizintechnik (1)
- Messgenauigkeit (1)
- Messtechnik (1)
- Mobile devices (1)
- Mord (1)
- Natrium-Ionen-Akkumulator (1)
- Netzwerk (1)
- Neurobiologie (1)
- Neurologie (1)
- Nuklearmedizin (1)
- Oberfläche (1)
- Paganini, Niccolò (1)
- Passives Bauelement (1)
- Photonik (1)
- Prothese (1)
- Prozessor (1)
- Raumklima (1)
- Schnittstelle (1)
- Segmentierung (1)
- Sicherheit (1)
- Spannung (1)
- Splitterbruch (1)
- Sprachgebrauch (1)
- Symmetrie (1)
- Target Vehicle (1)
- Thermoelektrizität (1)
- Tiefenmessung (1)
- Toulouse-Lautrec, Henri (1)
- Trauma (1)
- VANETs (1)
- VRU eSafety (1)
- Verkehrsregelung (1)
- Versorgungstechnik (1)
- Verteilung (1)
- Vorzeitigkeit (1)
- Wärmepumpe (1)
- ad hoc networks (1)
- car-to-car communication (1)
- data replication (1)
- distributed systems (1)
- eingebettetes System (1)
- emulation (1)
- inter-vehicle communication (1)
- intra-vehicle communication (1)
- kanal (1)
- kardiovaskuläres System (1)
- localization (1)
- middleware (1)
- performance analysis (1)
- performance evaluation (1)
- railways (1)
- real time (1)
- secondary surveillance radar (1)
- subsystem design (1)
- vehicular networks (1)
- wireless access networks (1)
- wireless sensor networks (1)
- wireless vehicular network (1)
- Überwachung (1)
Institute
- Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019) (107) (remove)
Open Access
- Open Access (30)
- Closed Access (24)
- Closed (20)
- Bronze (9)
Die direkte Vermarktung von Strom aus Wind und Sonne stellt einen wichtigen Schritt der Energiewende dar. Einerseits kann durch die Marktintegration die Unabhängigkeit von EEG-Subventionen gelingen. Andererseits wird über diese Mechanismen die Stromerzeugung an der Nachfrage orientiert, wodurch zur Stabilität des Stromnetzes beigetragen wird. Ein Beispiel dafür ist die lokale Vermarktung von PV-Strom in einem Mietshaus. Für deren Umsetzung benötigen die Akteure ein Mess- und Steuerungssystem, dass vor Ort Zähler- und Anlagendaten erfasst und die Abrechnung der Mieter vereinfacht. Außerdem sollte es Kennwerte wie beispielsweise den PV-Anteil berechnen und gegebenenfalls ein Blockheizkraftwerk steuern. Weder die Zählersysteme der Messstellenbetreiber noch die Steuerungssysteme von PV- oder Blockheizkraftwerken erfüllen diese Anforderungen ausreichend. In der Forschung ist man währenddessen bereits einen Schritt weiter und arbeitet an technischen Systemen, die für wesentlich komplexere Energiesystem- und Markttopologien ausgelegt werden. In dieser Arbeit werden die neuen technischen Anforderungen der Direktvermarktung in einem Mietshaus identifiziert und mit dem Stand aktueller Marktprodukte sowie dem System »OpenMUC« aus der Forschung verglichen.
This paper presents the elements and the results from the European research project inCASA (Integrated Network for Completely Assisted Senior Citizen’s Autonomy), which designed and implemented a seamless integration of heterogeneous systems and network protocols for regionally distributed telecare and telehealth applications. The integration includes a multitude of physical interface, the transcoding of data models using embedded middleware, and a backend system with open interfaces. The implementation was verified in field tests in five European countries.
Immer mehr Anwendungen der Heim- und der Gebäudeautomatisierung werden vernetzt, weil damit erweiterte Funktionen ermöglicht oder Kosten gespart werden können. Dabei führt eine Reihe von Aspekten zu einem erhöhten Risiko für diese vernetzten Systeme. Gegenwärtig arbeiten verschiedene Gruppen an Sicherheitslösungen für die vernetzte Heim- und Gebäudeautomatisierung. Der Beitrag gibt einen Überblick über diese Aktivitäten und zeigt die wesentlichen Entwicklungsrichtungen auf.
Efficient, secure and reliable communication is a major precondition for powerful applications in smart metering and smart grid. This especially holds true for the so called primary communication in the Local Metrological Network (LMN) between meter and data collector, as the LMN comes with the most stringent requirements with regard to cost, range, as well as bandwidth and energy efficiency. Until today, LMN field tests are operated all over the world. In these installations, however, energy autarkic systems play a marginal role. This contribution describes the results of the framework 7 (FP 7) WiMBex project (“Remote wireless water meter reading solution based on the EN 13757 standard, providing high autonomy, interoperability and range”). In this project an energy autarkic water meter was developed and tested, which follows the specification of the Wireless M-Bus protocol (EN 13757). The complete system development covers the PCB with the RF transceiver and the microcontroller, the energy converter and storage, and the software with the protocol. This contribution especially concentrates on the design, the development and the verification of the routing protocol. The routing protocol is based on the Q mode of EN13757-5 (Wireless M-Bus) and was extended by an additional energy state related parameter. This extension is orthogonal to the existing protocol and considers both the charge level and the charge characteristics (rate of occurrences, intensity). The software was implemented in NesC under the operating system TinyOS. The system was verified in an automated test bed and in field tests in UK and Ireland.
In the last decade, IPv6 over Low power Wireless Personal Area Networks, also known as 6LoWPAN, has well evolved as a primary contender for short range wireless communication and holds the promise of an Internet of Things, which is completely based on the Internet Protocol. In the meantime, various 6LoWPAN implementations are available, be it open source or commercial. One of these implementations, which was developed by the authors' team, was tested on an Automated Physical Testbed for Wireless Systems at the Laboratory Embedded Systems and Communication Electronics of Offenburg University of Applied Sciences, which allows the flexible setup and full control of arbitrary topologies. It also supports time-varying topologies and thus helps to measure performance of the RPL implementation. The results of the measurements show a very good stability and short-term and long-term performance also under dynamic conditions. In addition, it can be proven that the performance predictions from other papers are consistent with real-life implementations.
In dem Maße, in dem sich die industrielle Automatisierung verändert, verändern sich auch die Anforderungen an die Sicherheit. Neben der funktionalen Sicherheit rückt dabei immer mehr die Datensicherheit in den Mittelpunkt. Als „best practice“ bietet es sich an, bewährte Sicherungstechniken aus der IT auch in der industriellen Kommunikation einzusetzen.
Während neue Komponenten für „Short Range Wireless Networks“ längere Zeit eher moderate technische Fortschritte gebracht haben, sind in jüngerer Zeit einige außerordentlich interessante strategische Entwicklungslinien deutlich geworden, die in diesem Beitrag an Hand von konkreten Produktbeispielen vorgestellt werden.
Monitoring of the molecular structure of lubricant oil using a FT-Raman spectrometer prototype
(2014)
The determination of the physical state of the lubricant materials in complex mechanical systems is highly critical from different points of view: operative, economical, environmental, etc. Furthermore, there are several parameters that a lubricant oil must meet for a proper performance inside a machine. The monitoring of these lubricants can represent a serious issue depending on the analytical approach applied. The molecular change of aging lubricant oils have been analyzed using an all-standard-components and self-designed FT-Raman spectrometer. This analytical tool allows the direct and clean study of the vibrational changes in the molecular structure of the oils without having direct contact with the samples and without extracting the sample from the machine in operation. The FT-Raman spectrometer prototype used in the analysis of the oil samples consist of a Michelson interferometer and a self-designed photon counter cooled down on a Peltier element arrangement. The light coupling has been accomplished by using a conventional 62.5/125μm multi-mode fiber coupler. The FT-Raman arrangement has been able to extract high resolution and frequency precise Raman spectra, comparable to those obtained with commercial FT-Raman systems, from the lubricant oil samples analyzed. The spectral information has helped to determine certain molecular changes in the initial phases of wearing of the oil samples. The proposed instrument prototype has no additional complex hardware components or costly software modules. The mechanical and thermal irregularities influencing the FT-Raman spectrometer have been removed mathematically by accurately evaluating the optical path difference of the Michelson interferometer. This has been achieved by producing an additional interference pattern signal with a λ= 632.8 nm helium-neon laser, which differs from the conventional zero-crossing sampling (also known as Connes advantage) commonly used by FT-devices. It enables the FT-Raman system to perform reliable and clean spectral measurements from the analyzed oil samples.
On the possibility to use leaky feeders for positioning in chirp spread spectrum technologies
(2014)
Real Time Localization Systems using electromagnetic waves have significantly evolved during the last years. They also might be used in industrial and in mining environments. Here, topologies might include tunnels, where it might be difficult to ensure the field coverage. Leaky feeder cables are a common solution in case of normal radio communication. In this paper, we study the possibilities to use leaky feeders also for Time-of-Flight based real time localization in such linear topologies, like tunnels, but possibly also for 2D-localization. Theoretical analysis is verified with real-life measurements, which were performed using Chirp Spread Spectrum Technologies.