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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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Radio Map Filter for sensor Network Indoor Localization systems

Radio Map Filter for Sensor Network Indoor Localization Syst...

引用

ieee international conference on Industrial Informatics (INDIN)

作者： Yong Wu Jianbin Hu Zhong Chen School of Electronic Engineering and Computer Science Peking University Beijing China

sensor Network Indoor Localization systems (SNILS) gain a significant attention these years, due to their ease of deployment and inexpensiveness. Ranging methods play basic role in the localization system, in which the RSSI (received signal strength indicator)-based ranging technique attracts the most attention. But the accuracy of the RSSI-based localization method remains a big challenge, because of the severe fading effects in the indoor environment. In this paper, a radio map method is proposed to improve the accuracy of the RSSI-based SNILS. this method contains two phases. the first phase is the radio map setting up phase. the radio maps are a set of probability density functions (pdf) indicating the radio fading pattern in the concerned environment, which are setup by a cooperative target. the second phase is the target tracking phase. Position probability matrixes (PPM) are used to indicate the positions of the targets, which are calculated by refering the stored radio maps according to the real-time RSSI values. To improve the localization accuracy, a radio map based Bayesian filter is proposed to iteratively calculate the PPM to speed up the convergence of the variance. Fully distributed algorithms of the localization method and the filter are designed and are implemented in the MICA2 system. the experimental accuracy is shown to be less than 1 meter with 80% probability, much better than current RSSI-based SNILS.

关键词： Filters sensor systems Fading Indoor environments Probability density function Target tracking Bayesian methods Convergence distributed algorithms Algorithm design and analysis

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An Event-Triggered Smart sensor Network Architecture

An Event-Triggered Smart Sensor Network Architecture

引用

ieee international conference on Industrial Informatics (INDIN)

作者： Erico Meneses Leao Luiz Affonso Guedes Francisco Vasques Department of Computer Engineering and Automation DCA Federal University of Rio Grande do Norte Natal Rio Grande do Norte Brazil Department of Mechanical Engineering FEUP University of Porta Porto Portugal

A smart transducer is the integration of a sensor/actuator element, a processing unit and a network interface. Smart sensor networks are composed of smart transducer nodes interconnected through a communication network. this paper proposes a new architecture for smart sensor networks, that is driven by events (asynchronous data). the events are derived from a data compression algorithm embedded in the smart sensor, which compresses data from the sensor. the proposed architecture also provides configuration and monitoring data to manage the distributed system.

关键词： Intelligent sensors Transducers Automation Communication networks Construction industry Electrical equipment industry Intelligent actuators Communication standards Network interfaces Data compression

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Model-Based Simulation of distributed Real-time Applications

Model-Based Simulation of Distributed Real-time Applications

引用

ieee international conference on Industrial Informatics (INDIN)

作者： Wolfgang Herzner Rupert Schlick Alain Le Guennec Bruno Martin Smart Systems Division Austrian Research Centers GmbH Vienna Austria Esterel Technologies Toulouse France

In the embedded (real-time) systems domain, data-flow based modeling tools like Matlab Simulink or SCADE reg are increasingly used, because they not only allow for specifying functionality at a level closer to the semantics and terminology of the application domain than a conventionally used programming language like C, but also to simulate the designed model and such the specified behavior in an early project phase. However, in general such tools provide rather little support for simulating complete distributed real-time systems because of the lack of modeling communication aspects like latencies. Hence, this paper discusses an approach for simulating distributed time-triggered systems using SCADE, where the temporal requirements are imported from a platform independent model of the distributed system.

关键词： Mathematical model Hardware Real time systems Costs Terminology Computer languages Delay Middleware Frequency Redundancy

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Smart Nodes for Semantic Analysis of Visual and Aural Data

Smart Nodes for Semantic Analysis of Visual and Aural Data

引用

ieee international conference on Industrial Informatics (INDIN)

作者： Gerhard Pratl Laurentiu Frangu Institute of Computer Technology at the Vienna University of Technology Vienna Austria Electronics Engineering Polytechnic University of Bucharest Romania Department of Electronics and Telecommunications University of Galati Romania

this paper proposes a system architecture that uses smart adaptive wireless networks of embedded sensing components to automatically detect uncommon or dangerous situations. the transformation of sensor values to semantic concepts enables the system to recognize predefined situation recognition and create a consistent world model between the nodes. It supports human operators of surveillance system and brings existing CCTV systems to the next level of machine-supported scenario detection.

关键词： Surveillance Humans Intelligent sensors Cameras sensor systems System testing Streaming media TV Adaptive systems Data security

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Dynamic Rate and Control Adaptation in Networked Control systems

Dynamic Rate and Control Adaptation in Networked Control Sys...

引用

ieee international conference on Industrial Informatics (INDIN)

作者： Ana Antunes Paulo Pedreiras Luis Almeida Alexandre Mota

Modern embedded control systems are asked to exhibit higher distribution, higher degree of integration and to support operational flexibility. Conventionally the planning of distributed control systems was done either by considering worst-case requirements, leading to expensive and inefficient designs, or by considering average requirements, potentially leading to occasional run-time overloads. the dynamic rate adaptation technique was developed to support operational flexibility and a higher degree of integration in distributed control systems. this technique adapts the communication requirements of distributed feedback control loops by increasing the sampling periods of the messages associated to the control action in order to free network bandwidth when a possible network overload condition is detected. the distributed controllers have to be able to deal with the change of the sampling period and the variable sampling to actuation delay. this work reports different control approaches used in the implementation of the dynamic rate adaptation method, namely a static version based on a set of controllers with parameters pre-computed off-line, a dynamic version where the system parameters are identified online according to the dynamic behaviour of the distributed system and a hybrid version using an adaptive controller with a set of online identifiers.

关键词： Control systems Networked control systems distributed control Communication system control Sampling methods Runtime distributed feedback devices Bandwidth Delay Programmable control

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Application of Wireless sensor Network to Military Information Integration

Application of Wireless Sensor Network to Military Informati...

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ieee international conference on Industrial Informatics (INDIN)

作者： Scott M. Diamond Marion G. Ceruti Training Squadron Two Whiting Field FL USA Space and Naval Warfare Systems Center San Diego CA USA

the purpose of this investigative study is to develop a model for a system of systems to improve situation awareness and targeting through a real-time aerially deployed wireless sensor network. the main hypothesis of this work is that scalable, affordable, real-time wireless network can contribute to the common operating picture. this network can be used to overcome targeting discrepancies and counter asymmetric threats in the new warfare paradigm that pertains to opaque environments. Surveys identified requirements for a system of systems to meet requirements for situation assessment. this paper describes 1. a model to support the hypothesis that this network can to improve response to asymmetric threats, and 2. a system architecture based on commercial-off-the-shelf technology for military operations in this new combat paradigm.

关键词： Wireless sensor networks Acoustic sensors Real time systems sensor fusion Ultra wideband technology Space technology Counting circuits Joining processes sensor systems Fuses

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Strategy of virtual measurement for optimization of dynamic dead-time processes in automated control systems

Strategy of virtual measurement for optimization of dynamic ...

引用

ieee international conference on Industrial Informatics (INDIN)

作者： A. Dementjev H.-D. Ribbecke H. Kubin K. Kabitzsch Dresden University of Technology Dresden Germany

this paper presents a new method of virtual measurement of process parameters in the dead-time systems using the virtual adaptive sensor. the method's goal is elimination of the technology-related signal dead-time in automation systems for optimal process control. the additional goal is to make the real-time control possible also in complex processes with dead-time behavior without high development costs. A vacuum coating equipment is considered as an example where the coat thickness is measured by the X-ray fluorescent (XRF) method. It is characterized by significant dead-time that doesn't allow to realize qualitative process control. In order to choose a better strategy to develop the virtual adaptive sensor, the automation process was identified. the simulation of the virtual adaptive sensor on the basis of Artificial Neural Network has shown promising results.

关键词： Automatic control Process control Control systems Automation sensor phenomena and characterization sensor systems Signal processing Costs Coatings thickness measurement

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A Generic Approach for the Simulation of distributed Control systems using J2EE Technology

A Generic Approach for the Simulation of Distributed Control...

引用

ieee international conference on Industrial Informatics (INDIN)

作者： thorsten Garrels Hendrik Jurgens Uwe Schmidtmann Gerd von Colln

Continuous technical innovations result in decreasing product life cycles. this in turn requires a flexible production which is able to adapt to the constantly changing demands. Simulation techniques provide a promising approach for faster, less error-prone development. Furthermore it offers the opportunity to evaluate alternative production scenarios which helps to save time and to find optimized solutions. this paper presents the result of performance tests with the simulation environment drd-simulator which is based on J2EE technology. these performance tests use a Soft PLC which is connected to the simulation via a ModbusTCP fleldbus. Measurements indicate that J2EE is a suitable and scalable platform for the simulation of distributed control systems.

关键词： distributed control Programmable control Field buses Visualization Frequency conversion Computer aided engineering Production Testing Electrical equipment industry Industrial control

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Co-ordinated Management of Intelligent Pervasive Spaces

Co-ordinated Management of Intelligent Pervasive Spaces

引用

ieee international conference on Industrial Informatics (INDIN)

作者： Chee Y. Yong Bing Qiao Duncan J. Wilson Min Wu Derek Clements-Croome Kecheng Liu Richard Egan Chris G. Guy Thales Research and Technology Limited Berkshire UK School of Systems Engineering University of Reading Whiteknights Park Berkshire UK Arup London UK School of Construction Management & Engineering University of Reading UK

the content of this paper is a snapshot of a current project looking at producing a real-time sensor-based building assessment tool, and a system that personalises workspaces using multi-agent technology. Both systems derive physical environment information from a wireless sensor network that allows clients to subscribe to real-time sensed data. the principal ideologies behind this project are energy efficiency and well-being of occupants; in the context of leveraging the current state-of-the-art in agent technology, wireless sensor networks and building assessment systems to enable the optimisation and assessment of buildings. Participants of this project are from both industry (construction and research) and academia.

关键词： Buildings Intelligent sensors Wireless sensor networks Intelligent structures Automatic control Temperature sensors Space technology Productivity Environmental management Temperature measurement

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Securing communication in automation networks

Securing communication in automation networks

引用

ieee international conference on Industrial Informatics (INDIN)

作者： Dirk Reinelt Arndt Luder thomas Fuchs Center Distributed Systems Otto-von-Guericke University of Magdeburg Germany

Security is an intense discussed topic for industrial automation networks. this article will give an overview for security relevant considerations. the foundation of the network security is the analysis of the communication relations. Typical communication scenarios are listed with their constraints and characteristics. this paper will propose a first approach for a structured methodology to classify communications to be able to deduce security relevant use cases and proper methods.

关键词： Automation Communication system security Data security Information security Authentication Industrial relations Ethernet networks Cryptography Availability Authorization

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