Conference Papers

Here you will find publications by Fraunhofer IIS authors. These papers present individual topics from the Energy Management research area, including related technologies.

868 MHz Traffic Detective: A Software-Based Tool for Radio Traffic Monitoring

Wireless Congress, 18. November 2014: Radio traffic monitoring is a crucial task whenever different and incompatible radio frequency (RF) communication standards simultaneously exist within a given environment. In this paper, we present a software-based tool for RF traffic monitoring and diagnosis within the European 868 MHz Short Range Device (SRD) band that is composed of commercially available low-cost receiver hardware and an app-based algorithm for Android OS systems. Saalmüller, J.; Kuba, M.; Oeder, A.

Low-complexity sequence detection algorithm for FSK-based power line communications

Power Line Communications and its Applications (ISPLC), 2. April 2014: This paper presents a novel sequence detection algorithm well-suited for data transmission and wake-up receiver addressing in FSK-based narrowband power line communication applications, where the communication channel is characterized by non-white noise, interferers and frequency-selective signal attenuation. Kuba, M.; Klatt, M.; Oeder, A.

Security in Cyber Physical Systems CPS

embedded world conference, 25. Februar 2014: Today security is seen an integral part of personal computing. There is always a talk about huge libraries containing numerous crypto algorithms, key agreement mechanisms, hash algorithms and many more, which leads to accumulation of software resources needed to establish a secure connection between any two PCs on the planet. Wagner, M.

Open source framework for energy management - Software and hardware aspects of an energy management gateway

Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), 27. September 2013: The market for energy management systems is complicated and consists of a large number of proprietary and mutually interoperable applications. A hardware-independent energy management framework using standardized data objects for interoperable communication and an implemented security concept, all based on open source, can provide users an easy and standardized programmable platform to focus more on the application. Heusinger, P.; Wagner, M.

Analytical Method for Selecting a Rectification Technique for a Piezoelectric Generator based on Admittance Measurement

PowerMEMS, 2013: AC-DC converters employed for harvesting power from piezoelectric transducers can be divided into linear (i.e. diode bridge) and non-linear (i.e. synchronized switch harvesting on inductor, SSHI). This paper presents an analytical technique based on the measurement of the impedance circle of the piezoelectric element to determine whether either diode bridge or SSHI converter harvests more of the available power at the piezoelectric element. Mateu, L.; Zessin, H.; Spies, P.

Modeling of hybrid piezoelectrodynamic generators

Energy Harvesting Workshop, Juli 2013: Vibrational energy harvesters are used for collecting electrical power from mechanical vibrations and supplying low power applications. Combining a piezoelectric generator with an electrodynamic generator creates a hybrid piezoelectrodynamic generator. In this paper a model for this hybrid generator is proposed. The model allows the accurate simulation of the mechanical and electrical part of the generator. It also makes it possible to analyze the waveforms and phase relationships of the two electrical outputs of the hybrid generator and thus simulate power management circuits and their feedback on the generator. Mateu, L; Zessin, H., Spies, P.

Maximizing the Output Power of a Piezoelectric Generator from the Admittance Measurement by selecting the Rectification Technique

Energy Harvesting Workshop, Juli 2013: AC-DC converters employed for harvesting power from piezoelectric transducers can be divided into linear (i.e. diode bridge) and non-linear techniques (i.e. synchronized switch harvesting on inductor, SSHI). Depending on the piezoelectric element, a non-linear technique can improve a significant percentage the power harvested. This paper presents an analytical technique based on the measurement of the impedance circle of the piezoelectric element to determine whether the diode bridge harvests a considerable percentage of the available power. Mateu, L.; Zessin, H.; Spies, P.

Einsatz von Sensoren für Energieflussanalysen fürEnergienetze, Smart Grids, Smart Metering

AMA Verband für Sensorik und Messtechnik e.V. (AMA), 12. März 2013: Viele zusätzliche vernetzte Sensoren im Umfeld derlokalen Energieerzeugung, Versorgung und der Nutzung sind zukünftig nötig. Fast alle Messgrößen können heute bereits erfasst werden, aber oft zu aufwändig. Ronge, K.; Wittwer, C.

Development and implementation of a feature-based automatic classification algorithm for communication standards in the 868 MHz band

Global Communications Conference (GLOBECOM), 7. Dezember 2012: In this paper, we present the development and the implementation of a feature-based automatic classification algorithm for communication standards that are commonly used in the European 868 MHz short range device (SRD) frequency band, that can help to overcome this problem. Kuba, M.; Ronge, K.; Weigel, R.

Smart grid cyber security: A German perspective

Smart Grid Technology, Economics and Policies (SG-TEP), 4. Dezember 2012: This paper focuses on the work of smart grid security aspects on the low voltage segment within the German power grid. Evolving security standards are discussed against the background of potential vulnerabilities and it is emphasized, where additional effort is necessary to ensure privacy and security in the smart grid. Wagner, M.; Kuba, M.; Oeder, A.

Automatic communication standard recognition in wireless smart home networks

Consumer Communications and Networking Conference, 17. Januar 2012: Automatic recognition of communication standards is a crucial task, if universal interoperability between different communication systems is claimed. A gateway performing the recognition task can be used to interconnect heterogeneous systems with different and incompatible protocol waveforms. This paper proposes an algorithm for the automatic recognition of various communication standards used for wireless smart home networks in the European 868 MHz Short-Range Device frequency band. Kuba, M.; Klatt, M.; Ronge, K.; Weigel, R.

Modified parallel SSHI AC-DC converter for piezoelectric energy harvesting power supplies

Telecommunications Energy Conference (INTELEC), 2011: Piezoelectric transducers are used for harvesting electrical power from mechanical vibrations and supplying low power applications. The AC-DC converter for piezoelectric energy harvesting applications presented in this paper is a modified version of the Parallel Synchronized Switch Harvesting on Inductor (SSHI) Converter. This modified version provides better results in terms of efficiency than the Parallel SSHI technique. Mateu, L.; Lühmann, L.; Zessin, H.; Spies, P.

Energy harvesting - power supplies without batteries or cables

Sensor + Test Conference, 2011: Energy Harvesting makes use of minimum amounts of ambient energy like thermal gradients, vibrations or light. Collecting these amounts of energy a long time to power short actions like sensor measurements or wireless data transmissions is the key of energy harvesting. A lot of research and development activities are on-going world-wide, addressing materials, devices, systems and applications. Promising field trials are carried out in various application areas, most of them in wireless sensor networks. First products are available, mainly in the industrial and automation area whereas consumer products are predicted for the next ten years. The characterization of potential ambient energy sources shows a broad range of the typical parameters and thus big challenges for the system design. Different development approaches are possible to arrive at a cost-optimized power supply solution. Generic energy harvesting systems are composed of an energy transducer, a power management, some kind of energy storage and the final application. Matching of the different functional blocks will result in maximum energy output, minimum device cost and board space. Spies, P.

DC-DC-converter with input polarity detector for thermogenerators

PowerMEMS, 2009: This paper presents a DC-DC converter, which automatically detects the polarity of its input voltage. Thus, the converter can work with both positive and negative input voltages. It is intended to be used by energy harvesting thermogenerators with output voltages below 300 mV where hot and cold side can exchange. A test design achieved an efficiency of 65 % for an input voltage of 200 mV and an output voltage of 2.5 V with an output power of 4 mW. This first design was built with discrete components, but can also be integrated on a chip with few external components (such as transformer and input/output capacitor). Pollak, M.; Mateu, L.; Spies, P.