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Krämer, Matthias
Publications (4 of 4) Show all publications
Bader, S., Krämer, M., Lawal, N., O'Nils, M. & Oelmann, B. (2014). Remote image capturing with low-cost and low-power wireless camera nodes. In: Proceedings of IEEE Sensors: . Paper presented at 13th IEEE SENSORS Conference, SENSORS 2014; Valencia Conference CentreValencia; Spain; 2 November 2014 through 5 November 2014; Category numberCFP14SEN-USB; Code 112210 (pp. 730-733). IEEE Sensors Council, Article ID 6985103.
Open this publication in new window or tab >>Remote image capturing with low-cost and low-power wireless camera nodes
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2014 (English)In: Proceedings of IEEE Sensors, IEEE Sensors Council, 2014, p. 730-733, article id 6985103Conference paper, Published paper (Refereed)
Abstract [en]

Wireless visual sensor networks provide featurerich information about their surrounding and can thus be used as a universal measurement tool for a great number of applications. Existing solutions, however, have mainly been focused on high sample rate applications, such as video surveillance, object detection and tracking. In this paper, we present a wireless camera node architecture that targets low sample rate applications (e.g., manual inspections and meter reading). The major design considerations are a long system lifetime, a small size and a low production cost.We present the overall architecture with its individual design choices, and evaluate the architecture with respect to its application constraints. With a typical image acquisition cost of 1.5 J for medium quality images and a quiescent power demand of only 7 uW, the evaluation results demonstrate that long operation periods of the order of years can be achieved in low sample rate scenarios.

Place, publisher, year, edition, pages
IEEE Sensors Council, 2014
Series
Procedings of IEEE Sensors, ISSN 1930-0395
Keywords
Architecture; Cameras; Digital cameras; Image acquisition; Network architecture; Quality control; Security systems; Sensor networks
National Category
Engineering and Technology
Identifiers
urn:nbn:se:miun:diva-28858 (URN)10.1109/ICSENS.2014.6985103 (DOI)2-s2.0-84931069839 (Scopus ID)
Conference
13th IEEE SENSORS Conference, SENSORS 2014; Valencia Conference CentreValencia; Spain; 2 November 2014 through 5 November 2014; Category numberCFP14SEN-USB; Code 112210
Available from: 2016-09-21 Created: 2016-09-21 Last updated: 2017-06-30Bibliographically approved
Bader, S., Krämer, M. & Oelmann, B. (2013). A Domain-Specific Platform for Research in Environmental Wireless Sensor Networks. In: Sergey Yurish, IFSA - Barcelona, Spain Muhammad Shakeel Virk, Narvik University College, Norway (Ed.), SENSORCOMM 2013, The Seventh International Conference on Sensor Technologies and Applications: . Paper presented at Seventh International Conference on Sensor Technologies and Applications, SENSORCOMM 2013, August 25 - 31, 2013 Barcelona, Spain (pp. 200-207).
Open this publication in new window or tab >>A Domain-Specific Platform for Research in Environmental Wireless Sensor Networks
2013 (English)In: SENSORCOMM 2013, The Seventh International Conference on Sensor Technologies and Applications / [ed] Sergey Yurish, IFSA - Barcelona, Spain Muhammad Shakeel Virk, Narvik University College, Norway, 2013, p. 200-207Conference paper, Published paper (Refereed)
Abstract [en]

Wireless Sensor Networks have the ability to improve a multitude of existing application domains. These networks are built up from a number of sensor nodes with sensing, communication and processing capabilities and the performance of the networked system is defined by the performance of the node platform it is based on. In this paper, we present SENTIO-em, a hardware platform for research in the environmental monitoring application domain. Based on the application domain requirements, the architecture and implementation of SENTIO-em is optimized for environmental monitoring constraints, while it is sufficiently flexible to be reused for different applications within the domain. The architecture of the platform is presented and evaluated under both laboratory and different environmental conditions. The obtained results are compared to a number of existing node platforms, demonstrating that SENTIO-em provides high energy efficiency with increased processing performance, short state transition times, and low quiescent currents.

Keywords
Wireless Sensor Networks, Sensor Node Platform, Environmental Monitoring, Domain-specific Design
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-20038 (URN)STC (Local ID)978-1-61208-296-7 (ISBN)STC (Archive number)STC (OAI)
Conference
Seventh International Conference on Sensor Technologies and Applications, SENSORCOMM 2013, August 25 - 31, 2013 Barcelona, Spain
Available from: 2013-10-23 Created: 2013-10-23 Last updated: 2016-10-19Bibliographically approved
Krämer, M., Bader, S. & Oelmann, B. (2013). Implementing Wireless Sensor Network applications using hierarchical finite state machines. In: Networking, Sensing and Control (ICNSC), 2013 10th IEEE International Conference on: . Paper presented at 2013 IEEE Tenth International Conference on Networking, Sensing and Control, 10-12 April 2013 (pp. 124-129). IEEE conference proceedings
Open this publication in new window or tab >>Implementing Wireless Sensor Network applications using hierarchical finite state machines
2013 (English)In: Networking, Sensing and Control (ICNSC), 2013 10th IEEE International Conference on, IEEE conference proceedings, 2013, p. 124-129Conference paper, Published paper (Refereed)
Abstract [en]

In typical application scenarios of wireless sensor systems the embedded software follows a sequential program-flow. Such sequential systems are easily described using a finite state machine (FSM) abstraction model, as it is known from digital circuit design and control system development. In practice, a theoretical description in the form of an FSM must be transferred into a software implementation using an efficient programming abstraction method. This paper presents the implementation of a lightweight software library, which supports the development of wireless sensor applications based on hierarchical finite state machines (HFSM). With its minimalistic design approach, the implementation creates a small memory footprint and a high efficiency in state transitions and in Interrupt Service Routine execution. By introducing a hierarchical state machine architecture it is possible to split a complex algorithm into sub-modules. Hence, the code modularity and reusability is improved. Moreover, it is possible to test each module independently, so that code errors can be traced back more rapidly. This results in a very reliable application software.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2013
Series
IEEE International Conference on Networking Sensing and Control, ISSN 1810-7869
Keywords
embedded systems, finite state machines, modulation coding, telecommunication computing, telecommunication network reliability, wireless sensor networks, HFSM, code modularity, control system development, digital circuit design, embedded software implementation, hierarchical finite state machine abstraction model, interrupt service routine execution, lightweight software library, minimalistic design approach, programming abstraction method, sequential program-flow, small memory footprint, wireless sensor network application
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-20043 (URN)10.1109/ICNSC.2013.6548723 (DOI)000326863700022 ()2-s2.0-84881304734 (Scopus ID)STC (Local ID)978-1-4673-5199-7 (ISBN)978-1-4673-5200-0 (ISBN)978-1-4673-5198-0 (ISBN)STC (Archive number)STC (OAI)
Conference
2013 IEEE Tenth International Conference on Networking, Sensing and Control, 10-12 April 2013
Available from: 2013-10-23 Created: 2013-10-23 Last updated: 2016-10-20Bibliographically approved
Bader, S., Krämer, M. & Oelmann, B.A Testbed for the Evaluation of Solar Energy Harvesting Architectures.
Open this publication in new window or tab >>A Testbed for the Evaluation of Solar Energy Harvesting Architectures
(English)Manuscript (preprint) (Other academic)
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-20045 (URN)
Available from: 2013-10-23 Created: 2013-10-23 Last updated: 2016-09-29Bibliographically approved
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