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检索条件"任意字段=5th IEEE International Conference on Distributed Computing in Sensor Systems"

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Neural Fault Isolator for Wireless sensor Networks

Neural Fault Isolator for Wireless Sensor Networks

引用

5th international conference on Networked Sensing systems

作者： de Souza, Luciana Moreira Sa Padilha, Ricardo Sangoi Decker, Christian SAP Res Karlsruhe Germany SAP Strateg Dev St Leon Rot Germany Univ Karlsruhe TecO Karlsruhe Germany

ISBN: (纸本)9784907764319

Wireless sensor Networks are emerging as an innovative technology that can help to improve business processes. In such environments malfunctions and break-down states must be efficiently diagnosed to reduce to a minimum the economic losses. In this paper we present a fault isolation approach based an neural networks, which utilizes only a minimum set of Information such as the sensor value, node ID and timestamp as inputs. We believe that this information set could be provided by any WSN regardless of its specific implementation. this abstraction makes the fault isolator generically applicable in enterprise business systems. the neural fault Isolator was evaluated In a trial with 36 nodes and has proved to be highly efficient in the isolation of failed components.

关键词： Wireless sensor Networks Fault Isolation Artificial Intelligence

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EMG sensor Integration Based on Two-Dimensional Communication

EMG Sensor Integration Based on Two-Dimensional Communicatio...

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5th international conference on Networked Sensing systems

作者： Makino, Yasutoshi Ogawa, Shuhei Shinoda, Hiroyuki Univ Tokyo Dept Informat Phys & Comp Grad Sch Informat Sci & Technol Tokyo Japan

ISBN: (纸本)9784907764319

We have proposed a new communication technology called "Two-Dimensional Communication (2DC)" in our previous studies. the technology enables one to integrate sensor units on a flexible and stretchable sheet without individual wires. Electrical power is also supplied through the sheet to the sensor nodes in contact with it. this technology considered to be useful for room-size sensor network, wearable computing and so on. Last year, we proposed an electromyography-based man machine interface as a possible application of the 2DC. A myoelectric signal is the signal that can be detected when the muscle contraction occurs. One feature is that the myoelectric signals can be obtained before actual motions. thus the system can predict motions of the fingers when the myoelectric signal pattern is measured on forearm. It is considered that a high-density electrode array is required for improving the accuracy of the motion estimation. therefore, the 2DC technology is useful for integrating such a large number of the EMG sensor units without complicated wires. In this paper, we show how to connect sensors to the sheet efficiently without electrical contact. We also demonstrate how to send data and how to receive electricity with the single 2DC sheet. We adopt a time division multiplexing (TDM) method for reducing interferences. We show an electrical circuit for achieving TDM with low power consumption.

关键词： Electromyography (EMG) Man-Machine Interface Two-Dimensional Communication

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An algorithm of coverage control for wireless sensor networks in 3D underwater surveillance systems

引用

4th international conference on Intelligent computing

作者： Chen, Feng Jiang, Peng Xue, Anke Hangzhou Dianzi Univ Inst Informat & Control Hangzhou Zhejiang Peoples R China

ISBN: (纸本)9783540874409

In this paper, an algorithm of coverage control is introduced for three-dimensional underwater wireless sensor networks based on uniform deployment on surface which is suitable for water environment monitoring of wetland. sensor nodes are uniformly deployed on surface of monitoring waters with equal interval. After deployment, sensors are lowered to appropriate depths selected by the distributed algorithm such that the maximum three-dimensional coverage of underwater sensor space is maintained. For the maximization of comprehensive index composed of coverage and average distance, simulation results reveal that our scheme outperforms two- and one-dimensional random deployment and depth random deployment under different network scale.

关键词： 3D coverage Coverage control Underwater sensor networks

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Detecting Topological Change Using a Wireless sensor Network

Detecting Topological Change Using a Wireless Sensor Network

引用

5th international conference on Geographic Information Science

作者： Farah, Christopher Zhong, Cheng Worboys, Michael Nittel, Silvia Univ Maine Dept Spatial Informat Sci & Engn Orono ME 04469 USA

ISBN: (纸本)9783540874720

Dynamic geographic phenomena, such as forest fires and oil spills, can have dire environmental, sociopolitical, and economic consequences. Mitigating, if not preventing such events requires the use of advanced spatio-temporal information systems. One such system that has gained widespread interest is the wireless sensor network (WSN), a deployment of sensor nodes tiny untethered computing devices, which run on batteries and are equipped with one or more commercial off-the-shelf or custom-made sensors and a radio transceiver. this research deals with initial attempts to detect topological changes to geographic phenomena by an environmentally deployed wireless sensor network (WSN). After providing the mathematical and technical preliminaries, we define topological change and present in-network algorithms to detect such changes and also, to manage the WSN's resources efficiently. the algorithms are compared against a resource-heavy continuous monitoring approach via simulation. the results show that two topological changes, hole loss and hole formation, can be correctly detected in-network and that energy is greatly saved by our event-driven approach. In future work, we hope to test the algorithms over a broader range of topological changes and to relax some of the network assumptions.

关键词： Wireless sensor networks distributed algorithm topological change areal object

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the three-Lead Wireless ECG in sensor Networks for Mobile Patients

The Three-Lead Wireless ECG in Sensor Networks for Mobile Pa...

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5th international conference on Networked Sensing systems

作者： Nopparat, Visarut Keeratiwintakorn, Phongsak KMUTNB Dept Elect Engn Bangkok Thailand

ISBN: (纸本)9784907764319

Telemedicine is a future trend of medical care due to the increasing cost of treatment and the aging of population around the World. Several telecommunication technologies are proposed for transferring medical data between a point of care and a hospital. However, it does not provide full mobility where a patient still needs to be attached with wired monitoring devices. In this paper, we proposed a wireless three-lead electrocardiogram (ECG) device using a mote-based Wireless sensor Network (WSN) to transfer heart signals from a patient to a personal computer for monitoring and storing. Our proposed device augments the mote-based Telos node and TinyOS. the experiment results show the similarity of the ECG signals between our three-lead wireless ECG device and a wired commercial ECG device.

关键词： Telemedicine Electrocardiogram (ECG) EKG Wireless sensor Network TinyOS Telos Heart Monitoring

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A Software Architecture for Accessing Data in sensor Networks

A Software Architecture for Accessing Data in Sensor Network...

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5th international conference on Networked Sensing systems

作者： Ghosh, Arijit Givargis, Tony Univ Calif Irvine Sch Informat & Comp Sci Ctr Embedded Comp Syst Irvine CA 92697 USA

ISBN: (纸本)9784907764319

In this paper, we present a software architecture for accessing data in sensor networks. Designing a generic data access system for sensor networks is difficult. this is because the underlying physical architecture of sensor networks cannot be generalized which in turn affects the efficiency of the protocol. Further, applications have unique and often different data requirements. thus the data service layer should be configurable to satisfy the needs of the application. Recognizing this, we focus on defining a Software architecture that specifies the interface but leaves out the implementation. Any protocol can be used to realize this as long as it provides the services that matches the specifications. this is conceptually similar to template based programming where presentation is separated from implementation. We provide the details of our architecture and evaluate both its expressiveness to the application programmer and flexibility of implementation through a few example scenarios.

关键词： Software architecture

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Design and implementation of a low-cost attitude and heading nonlinear estimator

Design and implementation of a low-cost attitude and heading...

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5th international conference on Informatics in Control, Automation and Robotics

作者： Martin, Philippe Salauen, Erwan Ecole Mines Ctr Automat & Syst F-75272 Paris 06 France

ISBN: (纸本)9789898111326

In this paper we propose a nonlinear observer (i.e. a "filter") for estimating the orientation of a flying rigid body, using measurements from low-cost inertial and magnetic sensors. It has by design a nice geometrical structure appealing from an engineering viewpoint;it is easy to tune, computationally very economic, and with guaranteed (at least local) convergence around every trajectory. Moreover it behaves sensibly in the presence of acceleration and magnetic disturbances. We illustrate its good performance on experimental comparisons with a commercial system, and demonstrate its simplicity by implementing it on a 8-bit microcontroller.

关键词： observers sensor fusion nonlinear filters strapdown systems invariance inertial navigation extended Kalman filters

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Time synchronized wireless sensor system for building vibration measurement

Time synchronized wireless sensor system for building vibrat...

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5th international conference on Networked Sensing systems

作者： Uchimura, Yutaka Shibaura Inst Technol Koto Ku Tokyo 108 Japan

ISBN: (纸本)9784907764319

Network based wireless sensing has become an important area of research and various new applications for remote sensing are expected to emerge. One of the promising applications is structural health monitoring of building or civil engineering structure and it often requires vibration measurement. For the vibration measurement via wireless network, time synchronization Is Indispensable. In this paper, we introduce a newly developed time synchronized wireless sensor network system. the system employs ieee 802.11 standard based TSF counter and sends the measured data with the counter value. It enables consistency on common clock among: different wireless nodes. We describe the accuracy evaluation by both mathematical analysis and simulation studies when the size of nodes Increased. the hardware and software specifications of the developed wireless sensing system are shown. the experiments were conducted In a three-story reinforced concrete building and results showed the system performs more than sufficiently.

关键词： Reinforced concrete

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Structural Health Monitoring System based on Strain Gauge Enabled Wireless sensor Nodes

Structural Health Monitoring System based on Strain Gauge En...

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5th international conference on Networked Sensing systems

作者： Choi, Haksoo Choi, Sukwon Cha, Hojung Yonsei Univ Dept Comp Sci Seoul 120749 South Korea

ISBN: (纸本)9784907764319

Strain gauges are widely used in Structural Health Monitoring (SHM) systems because they are inexpensive, easy to install, and sensitive enough to detect the potential danger of collapse of a building or structure. However, off-the-shelf equipment for the strain gauges is usually either wired to the sensors or wireless with very limited range, which significantly increases the total cost as well as restricting the performance of the deployment. In this paper, we propose a structural health monitoring system based on wireless sensor nodes equipped with Inexpensive strain gauges. the performance of the system is not limited, because multi-hop deployment is possible. Our system consists of a sensor board, which properly amplifies and converts the signal from the strain gauges, and communication software, written in TinyOS, that is in charge of reliable transport of the strain data. We evaluated our system in comparison with the commercial equipment. the experiment results show that the proposed system is reliable and effective for use in structural health monitoring.

关键词： strain gauge structural health monitoring wireless sensor networks

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Trilateration localization for multi-robot teams

Trilateration localization for multi-robot teams

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5th international conference on Informatics in Control, Automation and Robotics

作者： Maxim, Paul M. Hettiarachchi, Suranga Spears, William M. Spears, Diana F. Hamann, Jerry Kunkel, thomas Speiser, Caleb Univ Wyoming Laramie WY 82070 USA Eastren Oregon Univ La Grande OR 97850 USA

ISBN: (纸本)9789898111319

the ability of robots to quickly and accurately localize their neighbors is extremely important for robotic teams. Prior approaches typically rely either on global information provided by GPS, beacons and landmarks, or on complex local information provided by vision systems. In this paper we describe our trilateration approach to multi-robot localization, which is fully distributed, inexpensive, and scalable (Heil, 2004). Our prior research (Spears et. al, 2006) focused on maintaining multi-robot formations indoors using trilateration. this paper pushes the limits of our trilateration technology by testing formations of robots in an outdoor setting at larger inter-robot distances and higher speeds.

关键词： localization trilateration formations distributed outdoor

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