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2018 Geoinformation for Disaster Management conference, Gi4DM 2018

作者： Akca, Devrim Stylianidis, Efstratios Poli, Daniela Gruen, Armin Altan, Orhan Hofer, Martin Smagas, Konstantinos Martin, Victor Sanchez Walli, Andreas Jimeno, Elisa Garcia, Alejandro Department of Civil Engineering Isik University Istanbul Turkey School of Spatial Planning and Development Aristotle University of Thessaloniki Greece 4DiXplorer AG Zurich Switzerland Department of Information Architecture ETH Zurich Switzerland Department of Geomatics Engineering Istanbul Technical University Turkey Ekinoks Surveying Software Engineering Ltd Istanbul Turkey GeoVille Information Systems GmbH Innsbruck Austria GeoImaging Ltd Nicosia Cyprus Ingeniería Y Soluciones Informáticas S.L. Sevilla Spain

Forest agencies give special attention to forest fires where post-disaster loss can rarely be gauged in a quick and economic way unless an appropriate technology is adopted. Determination of the planimetric and volumetric changes between pre- and post-fire is in high demand. The FORSAT system (a satellite processing platform for high resolution forest assessment) was developed to meet the relevant demands. It has the capability of extracting of 3D geometric information from the very-high resolution (VHR) imagery from satellite optical sensors and automatic 3D change detection. FORSAT includes two main units. The first one is dedicated to the geometric and radiometric processing of satellite optical imagery and 2D/3D information extraction. This includes: image radiometric pre-processing, image and ground point measurement, improvement of geometric sensor orientation, quasi-epipolar image generation for stereo measurements, digital surface model (DSM) extraction by using a precise and robust image matching approach specially designed for VHR satellite imagery, generation of orthoimages, and 3D measurements in single images using mono-plotting and in stereo images. FORSAT supports most of the VHR optically imagery commonly used for civil applications: IKONOS, OrbView - 3, SPOT - 5 HRS, SPOT - 5 HRG, QuickBird, GeoEye-1, WorldView-1/2, Pléiades 1A/1B, SPOT 6/7. The second unit of FORSAT is dedicated to 3D surface comparison for change detection. It allows users to import DSMs, to co-register them using an advanced 3D surface matching approach and to calculate the planimetric and volumetric changes between epochs. The capacity and benefits of FORSAT have been tested in two real cases, where are burned areas located in Cyprus and Austria. The geometric characteristics of burned forest areas have been identified both in 2D plane and 3D volume dimensions, using pre- and post-fire optical data from different sensors. FORSAT is a single source and flexible forest information

关键词： Image matching

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Tracking Control of Oscillatory Motion in IPMC Actuators for Underwater applications

Tracking Control of Oscillatory Motion in IPMC Actuators for...

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2010 IEEE/ASME international conference on advanced intelligent mechatronics (AIM 2010)

作者： Sisi Song Yingfeng Shan Kwang J. Kim Kam K. Leang Electroactive Systems and Controls Laboratory Department of Mechanical Engineering University of Nevada슠Reno Reno NV USA Electroactive Systems and Controls Laboratory University of Nevada슠Reno Reno NV USA Active Materials and Processing Laboratory University of Nevada슠Reno Reno NV USA

Ionic polymer-metal composite (IPMC) actuators have many advantages;for instance, they (1) can be driven with low voltages (<5 V);(2) are soft, flexible and easily shaped;and (3) can operate in an aqueous environment (such as water). Important applications for IPMCs include active catheter devices for minimally invasive surgery, artificial muscle, and sensors and actuators for biorobotics. For applications such as endoscopy and flapping-based propulsion systems in aquatic robots, the IPMC actuator is required to precisely track a periodic reference trajectory. However, due to dynamic effects, nonlinear behavior, and external disturbances, uncompensated open-loop control yields excessively-large tracking error. This paper focuses on precision tracking of oscillatory motion in IPMC actuators. A feedback controller based on the repetitive control concept is proposed to improve tracking performance from one operating period to the next. The stability of the controller is analyzed in the discrete-time domain, and design considerations are discussed. The method is applied to a newly fabricated Perfluorinated Ion Exchange Membrane based IPMC actuator with lithium as its counter-ion. The tip displacement of the IPMC actuator is measured by a strain gage sensor. This newly proposed sensing scheme is low cost, practical, effective, and importantly, compact. Experimental results show the combined control and sensing scheme can minimize the tracking error by approximately 50percent compared to PID control for tracking of periodic signals including sinusoidal and triangular wave forms.

关键词： sensors Actuators Strain Trajectory Tracking Measurement by laser beam Strain measurement

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Preventing Attacks and Detecting Intruder for Secured Wireless sensor Networks

Preventing Attacks and Detecting Intruder for Secured Wirele...

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International conference on Wireless Communications, Signal Processing and Networking

作者： Gauri Kalnoor Jayashree Agarkhed Department of Computer Science and Engineering PDA College of Engineering Department of Computer Science & Engineering PDA College of Engineering

ISBN: (纸本)9781467393393

Protection of network is the most challenging issue for preventing the harmful types of attacks and poses security issue in WSN along with information security application domains. Some of the architectures and guidelines are proposed to protect Wireless sensor networks (WSN) against different attacks done by intruders. WSN has large variety of applications that includes mass public, military and so on. The sensors in WSN are deployed in such a way that, its sensing technology has processing power and wireless communication. Use of traffic analysis for detecting anomalies is one of most efficient and effective technique for detecting an intruder and preventing. In many applications of WSN, a critical issue is to protect the network of sensors from adversaries and malicious strong attacks. Here, we discuss, some advanced preventive security mechanisms and intrusion detection systems which play important role in detecting and preventing security attacks in WSN.

关键词： WSN Intruder Attacks Detection mechanisms Issues Challenges

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Design Considerations of Wireless Monitoring Networks for Concentrated Photovoltaic Power Plant applications

Design Considerations of Wireless Monitoring Networks for Co...

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International conference on Smart Grid Technology, Economics and Policies

作者： Wensi Wang Victor Cionca Donagh O'Mahony Ningning Wang Mike Hayes Brendan O'Flynn Cian O'Mathuna Microsystems Group Tyndall National Institute

ISBN: (纸本)9781467359313

advanced monitoring systems of smart grids (SG) present significant growth potential for renewable energy generation whilst low-cost and miniaturized wireless sensor nodes bring opportunities to replace large and expensive monitoring equipment. Renewable power systems required complicated monitoring and control. For example, a concentrated photovoltaic (CPV) power plant requires temperature, electric current and component faults monitoring. All of these can be provided by wireless sensor networks (WSN). However, the practical implementation of WSN solutions for CPV application remains largely unexploited. A gap exists in the research of SG WSN monitoring system. Power system researchers lack understanding of the capability of state-of-the-art WSN systems, whilst the WSN researcher lack on understanding of the detailed application area of SG. This paper addresses the practical issues encountered during the design of a SG WSN and an insight how this knowledge gap can be bridged. It starts with introduction of WSN system with the concept of constrained resources in wireless communication, energy and data processing capability. Then, it presents the CPV WSN design architecture and issues ranging from network scalability, topology, sampling rate to sensor selection based on the constrained resources in WSN. The target application scenario is 1MW scale CPV power plant with 40 CPV panels. Overall, this paper presents valuable design considerations along with an analysis of trade-offs for power plant level CPV monitoring system implementation based on IEEE 802.15.4 wireless sensor platforms.

关键词： Wireless sensor networks WSN gene design consideration PHOTOVOLTAIC POWER PLANTS program area renewable energy power generation Steam generators monitoring systems Power Plants Wireless monitoring

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Fault Diagnosis in Electric Drives using Machine Learning Approaches

Fault Diagnosis in Electric Drives using Machine Learning Ap...

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International Electric Machines & Drives conference

作者： Andre A. Silva Ali M. Bazzi Shalabh Gupta Laboratory of Intelligent Networks and Knowledge-Perception Systems (LINKS) ooth Engineering Center for Advanced Technology (BECAT) University of Connecticut Storrs CT USA Advanced Power Electronics and Electric Drives Lab (APEDL) Center for Clean Energy Engineering University of Connecticut Storrs CT USA

This paper applies machine learning techniques to fault diagnosis in electric motor drives. As faults in motor drives can cause safety hazards in applications such as electric traction, propulsion, aircraft, and others, it is desired to diagnose the fault, i.e., detect it and isolate it, in order to recover or engage safe-mode operation. Machine learning methods are divided into three main steps: 1) Feature extraction using Principal Component Analysis (PCA);2) Classification using the k-Nearest Neighbor (k-NN) or Probabilistic Neural Network (PNN) methods;and 3) Classifier performance evaluation using the Cross-Validation (CV) method. While electric machine, inverter, and sensor faults are introduced, the supervised learning algorithms are applied to four case studies where two fault modes occur in a current sensor, and two occur in the speed encoder. Classification accuracy, i.e., the ability to diagnose a fault, for all four cases is shown to exceed 98%. The paper also investigates a load profile used in automotive driving cycles which produces richer dynamic responses that are more interesting from an application perspective. The final goal is to implement these algorithms in real-time such that fault diagnosis can be used to isolate drive faults, especially sensor faults, and operate in a safe mode.

关键词： PCA PNN CV

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Electromagnetic Analysis of Fringed Microstrip Lines on Porosified LTCC

Electromagnetic Analysis of Fringed Microstrip Lines on Poro...

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Electromagnetic Metrology Symposium

作者： Armin Talai Frank Steinhausser Bjorn Gmeiner Achim Bittner Ulrich Rude Ulrich Schmid Robert Weigel Alexander Koelpin Institute for Electronics Engineering Friedrich-Alexander-University Erlangen-Nuremberg Institute of Sensor and Actuator Systems Vienna University of Technology Department of Computer Science 10 Friedrich-Alexander-University Erlangen-Nuremberg

ISBN: (纸本)9781467357067

Recent investigations demonstrated that porosification of LTCC enables a local modification of material properties, in particular of the effective permittivity. These studies revealed that the electric field strength is highest at the lower conductor track edges on the porosified substrate. The local field strength peaks cause substantial influence on the effectiveness of permittivity reduction due near-surface material abrasions. In this paper, the influences of these randomly fringed boundaries on electromagnetic properties are investigated for different degrees of fraying. The gained results are compared to measured screen print edges by scanning electron microscope image analysis of co-fired and post-fired gold conductors, and will contribute for reliable circuit design on porous LTCC in the future.

关键词： Conductor edge Field simulation Fringed microstrip Structural modeling LTCC Cofired Reduction of permittivity Porosification Inhomogeneous substrate

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Distinguishing Tip-Toe Walking from Normal Walking Using Skeleton Data Gathered By 3D sensors

Distinguishing Tip-Toe Walking from Normal Walking Using Ske...

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RSI/ISM International conference on Robotics and Mechatronics

作者： Mohsen Ebrahimi Meysam Feghi Hadi Moradi Maryam Mirian Hamidreza Pouretemad Advanced Robotics and Intelligent Systems Laboratory CIPCE School of ECE College of Engineering University of Tehran School of Psychology Shahid Beheshti University Tehran Iran

ISBN: (纸本)9781467372350

in this paper, we propose a markerless based approach to differentiate between two different human walking gaits, specifically, the normal walking versus tip toe walking. The markerless based approaches are suitable in many applications, such as screening of autistic children from normal ones based on their body movement patterns or detecting walking irregularities. We use a 3D sensor to collect 3D skeletal data of subjects that represents their behavioral spatial data. Several features have been extracted and feature selection methods were used to determine the best subset of these features. The proposed classification approach has been implemented and tested on a group of 75 people reaching 86% CCR between tip toe walking and normal walking.

关键词： Gait Recognition Motion Capture Kinect 3D sensor Tip-toe Walking

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A Cryogenic Mass Flow sensor

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AIP conference Proceedings 2006年第1期823卷

作者： D. M. Kocak J. F. Justak F. M. Caimi S. W. Van Sciver Advanced Technologies Group Inc Stuart Florida 34994 National High Magnetic Field Laboratory Florida State University Tallahassee Florida 32310‐3706

A sensor for determining mass flow of cryogens in spacecraft propellant management is desired by vehicle designers. Current point sensor technology is incapable of determining high pressure, high flow rate cryogenic fluid quality and mass flow rate, and has proven to be inaccurate in attempting to rapidly measure cryogen depletion. Abrupt changes in fluid quality can cause turbo‐machinery to over‐speed, potentially causing catastrophic failure. A Cryogenic Flow sensor (CFS) presented herein provides a means to avoid these failures as well as providing fluid quality data for a wide range of flow systems. Experimental CFS hardware has been able to detect the onset of two‐phase flow and the presence of debris in the flow of a surrogate fluid and has been able to discern between entrained gas bubbles and unwanted debris. In an advanced implementation, the sensor also has the potential to determine size and quantity of the contaminant. To determine the mass flow rate of the fluid propellant a non‐intrinsic method has been designed. Here we describe a combined acoustic and optical (acousto‐optic) sensor design that has the potential to provide this needed quantification in both zero‐g and ground based applications. A cryogenic sensor with these capabilities is very desirable to the cryogenic fluids management community, as well as other fluid management systems, and has many commercial applications. The paper presents both theoretical and experimental data.

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An Open-Source Wireless Mesh Networking Module for Environmental Monitoring

An Open-Source Wireless Mesh Networking Module for Environme...

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IEEE International Instrumentation and Measurement Technology conference

作者： Hsiao-Hsien Lin Hsi-Yuan Tsai Teng-Chieh Chan Yen-Shuo Huang Yuan-Sun Chu Yu-Chieh Chen Tai-Shan Liao Yao-Min Fang Bing-Jean Lee Huang-Chen Lee Dept. of Communications Engineering and Advanced Institute of Manufacturing with High-tech Innovations National Chung Cheng University Taiwan Instrument Technology Research Center National Applied Research Laboratories Taiwan GIS Research Center Feng Chia University Taiwan

ISBN: (纸本)9781479961153

Wireless mesh networking extends the communication range among cooperating multiple low-power wireless radio transceivers and is useful for collecting data from sensors widely distributed over a large area. By integrating an off-the-shelf wireless design, such as the XBee module, development of sensor systems with mesh networking capability can be accelerated. In this study, the design of an open-source wireless network module is introduced, which integrates the functions of network discovery, routing control, and transmission scheduling. In addition, this design is provided in an open-source format in order to promote the use of wireless mesh networking for environmental monitoring applications. Testing of the design and the proposed networking module is reported. For a 10-node implementation an average packet delivery ratio is 95.58%. The proposed system was demonstrated to have the advantages of low-cost combined with high reliability and performance. The proposed design can aid scientists to implement monitoring applications without the complications of complex wireless networking issues.

关键词： XBee wireless sensor mesh network module open-source 802.15.4 ZigBee

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Dynamic sensing model for accurate delectability of environmental phenomena using event wireless sensor network

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AIP conference Proceedings 2017年第1期1872卷

作者： Lial Raja Missif Mohammad M. Kadhum 1National Advanced IPv6 Center (NAv6) Universiti Sains Malaysia (USM) 11800 Pulau Pinang Malaysia 2Telecommunication Research Laboratory School of Computing Queen’s University K7L 3N6 Kingston ON Canada

Wireless sensor Network (WSN) has been widely used for monitoring where sensors are deployed to operate independently to sense abnormal phenomena. Most of the proposed environmental monitoring systems are designed based on a predetermined sensing range which does not reflect the sensor reliability, event characteristics, and the environment conditions. Measuring of the capability of a sensor node to accurately detect an event within a sensing field is of great important for monitoring applications. This paper presents an efficient mechanism for even detection based on probabilistic sensing model. Different models have been presented theoretically in this paper to examine their adaptability and applicability to the real environment applications. The numerical results of the experimental evaluation have showed that the probabilistic sensing model provides accurate observation and delectability of an event, and it can be utilized for different environment scenarios.

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