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检索条件"任意字段=Conference on Advanced Sensor Systems and Applications VII"

共 4657 条记录，以下是161-170 订阅

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Optimizing the loss of one-dimensional photonic crystal towards high-sensitivity Bloch-surface-wave sensors under intensity interrogation scheme 7

Optimizing the loss of one-dimensional photonic crystal towa...

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conference on advanced sensor systems and applications vii

作者： Kong, Weijing Wan, Yuhang Du, Kun Zhao, Wenhui Wang, Shuang Zheng, Zheng Tianjin Univ Technol & Educ Sch Elect Engn 1310 Dagu South Rd Tianjin 30022 Peoples R China Beihang Univ Sch Elect & Informat Engn 37 Xueyuan Rd Beijing 100191 Peoples R China

ISBN: (数字)9781510604704

ISBN: (纸本)9781510604698;9781510604704

The reflected intensity change of the Bloch-surface-wave (BSW) resonance influenced by the loss of a truncated one-dimensional photonic crystal structure is numerically analyzed and studied in order to enhance the sensitivity of the Bloch-surface-wave-based sensors. The finite truncated one-dimensional photonic crystal structure is designed to be able to excite BSW mode for water (n= 1.33) as the external medium and for p-polarized plane wave incident light. The intensity interrogation scheme which can be operated on a typical Kretschmann prism-coupling configuration by measuring the reflected intensity change of the resonance dip is investigated to optimize the sensitivity. A figure of merit (FOM) is introduced to measure the performance of the one-dimensional photonic crystal multilayer structure under the scheme. The detection sensitivities are calculated under different device parameters with a refractive index change corresponding to different solutions of glycerol in de-ionized (DI)-water. The results show that the intensity sensitivity curve varies similarly with the FOM curve and the sensitivity of the Bloch-surface-wave sensor is greatly affected by the device loss, where an optimized loss value can be got. For the low-loss BSW devices, the intensity interrogation sensing sensitivity may drop sharply from the optimal value. On the other hand, the performance of the detection scheme is less affected by the higher device loss. This observation is in accordance with BSW experimental sensing demonstrations as well. The results obtained could be useful for improving the performance of the Bloch-surface-wave sensors for the investigated sensing scheme.

关键词： Bloch surface waves optical sensor photonic crystals loss

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Rope Deployment Method for Ropeway-type Vermin Detection systems 32

Rope Deployment Method for Ropeway-type Vermin Detection Sys...

引用

32nd IEEE International conference on advanced Information Networking and applications (AINA)

作者： Ogura, Kodai Nihonyanagi, Kei Katsuma, Ryo Osaka Prefecture Univ Sakai Osaka 5998531 Japan

ISBN: (纸本)9781538621950

In recent years, damage to rural areas by vermin such as deer, wild boars or monkeys has increased in both frequency and severity. This problem is expected to be counteracted by wireless sensor networks constructed from multiple sensor nodes with wireless communication devices. These systems reduce the damage by detecting vermin and repelling them by signals such as sounds and light. However, owing to their fixed monitoring cameras, general monitoring systems cannot always cope with plant growth and other obscurations that decrease the monitored area. This paper proposes a ropeway-type vermin detection system that moves the monitoring cameras on ropes, and a method that minimizes the number of required ropes in the expected monitoring scenario. For efficient monitoring with as few cameras as possible, the method groups several target areas into one by a clustering procedure. The grouped area can then be monitored from a single position. Subsequently, our algorithm finds the most efficient rope deployment that completely monitors the grouped areas. In simulations, the proposed method monitored all target areas with 26% fewer monitoring cameras than a general clustering method (k-means clustering).

关键词： vermin monitoring sensor network sensing

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Multi-sensor Data Fusion for Cluster-based Data Aggregation in IoT applications 13

Multi-Sensor Data Fusion for Cluster-based Data Aggregation ...

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13th IEEE International conference on advanced Networks and Telecommunication systems (IEEE ANTS)

作者： Redhu, Surender Hegde, Rajesh M. Indian Inst Technol Kanpur Uttar Pradesh India

ISBN: (纸本)9781728137155

Clustering of devices plays a significant role in the development of energy-efficient wireless sensor networks for IoT applications. In this paper, a novel clustering method is proposed which utilizes the multiple sensor modalities of devices to develop an energy-efficient data aggregation protocol. It groups the devices of a network into different clusters using a fused resemblance matrix. The proposed method fuses different sensor modalities like radio, acoustic and light to obtain robust resemblance coefficients. The weights for fusion of different modalities are computed using the modelling error and within a confidence interval. The proposed clustering method is developed using the hierarchical agglomerative clustering framework. Performance of the proposed method in cluster-based data aggregation is evaluated for various sensor networks. Experimental results illustrate the significance of the proposed multi-sensor data based clustering scheme in energy-efficient data aggregation over IoT networks.

关键词： Cluster analysis

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Experimental single-chip color HDTV image acquisition system with 8M-pixel CMOS image sensor

Experimental single-chip color HDTV image acquisition system...

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conference on sensors, Cameras and systems for Scientific/Industrial applications vii

作者： Shimamoto, H Yamashita, T Funatsu, R Mitani, K Nojiri, Y NHK Japan Broadcasting Corp Sci & Tech Res Labs Setagaya Ku 1-10-11 Kinuta Tokyo Japan

ISBN: (纸本)0819461083

We have developed an experimental single-chip color HDTV image acquisition system using 8M-pixel CMOS image sensor. The sensor has 3840 x 2160 effective pixels and is progressively scanned at 60 frames per second. We describe the color filter array and interpolation method to improve image quality with a high-pixel-count single-chip sensor. We also describe an experimental image acquisition system we used to measured spatial frequency characteristics in the horizontal direction. The results indicate good prospects for achieving a high quality single chip HDTV camera that reduces pseudo signals and maintains high spatial frequency characteristics within the frequency band for HDTV.

关键词： single chip color CFA interpolation CMOS image sensor HDTV SHD SHV

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PSense: Reducing Energy Consumption in Public Sensing systems

PSense: Reducing Energy Consumption in Public Sensing System...

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26th IEEE International conference on advanced Information Networking and applications (AINA)

作者： Baier, Patrick Duerr, Frank Rothermel, Kurt Univ Stuttgart Inst Parallel & Distributed Syst D-70569 Stuttgart Germany

ISBN: (纸本)9780769546513

Utilizing peoples' mobile devices for gathering sensor data has attracted a lot of attention within the last few years. As a result, a great variety of systems for sensing environmental phenomena like temperature or noise have been proposed. However, most of these systems do not take into account that mobile devices have only limited energy resources. For instance, an often assumed prerequisite is that mobile devices are always aware of their position. Given the fact that a position fix is a very energy consuming operation, continuous positioning would quickly drain a device's battery. Since the owners of the mobile devices will not tolerate a significant reduction of the devices' battery lifetime, such an approach is not suitable. To address this issue we present PSense, a flexible system for efficiently gathering sensor data with mobile devices. By avoiding unnecessary position fixes, PSense reduces the energy consumption of mobile devices by up to 70% compared to existing mobile sensing approaches. This is achieved by introducing an adaptive positioning mechanism and by utilizing energy efficient short-range communication to exchange position related information.

关键词： Wireless sensor networks Mobile Computing Energy-aware systems

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Target Coverage using a Collaborative Platform for sensor Cloud 9

Target Coverage using a Collaborative Platform for Sensor Cl...

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9th IEEE International conference on advanced Networks and Telecommuncations systems (ANTS)

作者： Sen, Biplab K. Khatua, Sunirmal Das, Rajib K. Univ Calcutta Dept Comp Sci & Engn Kolkata 700073 W Bengal India

ISBN: (纸本)9781509002931

Nowadays sensor-cloud has received a lot of interests among researchers in the field of Wireless sensor Networks (WSN) as well as Cloud Computing. An integral part of the sensor Cloud platform is the Collaboration of WSN providers which improves the utilization of sensor resources. The physical sensors in such a collaborative environment are shared among multiple applications from different administrative domains. In this paper, we propose a sensor Cloud Architecture which allows the users to deploy their sensor applications on-demand within the collaborative platform. The sensor resources used by the application are provided as a service to the user. The cost for offering such service depends on the number of physical sensors selected for covering the targets (locations of interest) for that application as well as connecting the selected physical sensors to the base station. In this paper, we proposed a two phase algorithm for this problem. In the first phase (Coverage), an Integer Programming Problem(IPP) is used to find a minimum set of sensors to cover the targets. In the next phase (Connectivity) a heuristic is used to extend the set such that connectivity of all the selected sensors is ensured. The performance of the proposed approach is validated through simulation which shows significant improvement of using collaboration over multiple non-collaborative WSNs. We also establish the superiority of the heuristic for ensuring connectivity over one such algorithm in the literature.

关键词： Virtual sensor collaborative network sensor cloud target coverage

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Laser pointing sensor system for beaconless lasercom 7

Laser pointing sensor system for beaconless lasercom

引用

conference on Next-Generation Optical Communication - Components, Sub-systems, and systems vii

作者： Jacoby, Marc T. Swank, Aaron J. Opt Phys Co 4133 Guardian St Simi Valley CA 93063 USA NASA Glenn Res Ctr 21000 Brookpk Rd Cleveland OH 44135 USA

ISBN: (数字)9781510616080

ISBN: (纸本)9781510616080;9781510616073

Optical Physics Company (OPC) has developed under SBIR Phase II funding an advanced laser pointing sensor system (LPSS) for future integration into the NASA Integrated Radio and Optical Communications (iROC) program. This would enable deep space pointing of high rate communications terminals to earth terminals via beaconless lasercom. The heart of the LPSS is OPC's patented interferometric star tracker which can provide better than 300 nrad pointing accuracy. This paper will report on the LPSS technology and the upcoming ground field testing to verify the pointing accuracy required for deep space high rate laser communications.

关键词： laser pointing sensor system interferometric star tracker deep space beaconless lasercom

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Preparation of novel HTS films and tunnel junctions for advanced C3I sensor applications 7

Preparation of novel HTS films and tunnel junctions for adva...

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conference on Micro- and Nanotechnology sensors, systems, and applications vii

作者： Taylor, Benjamin J. Emery, Teresa H. Berggren, Susan A. E. de Escobar, Anna M. Leese Jeon, Inho Maple, M. Brian Space & Naval Warfare Syst Ctr Pacific Adv Concepts & Appl Res Branch Cryogen Exploitat RF CERF Lab San Diego CA 92152 USA Univ Calif San Diego La Jolla CA 92093 USA Univ Calif San Diego Mat Sci & Engn Program La Jolla CA 92093 USA Univ Calif San Diego Ctr Adv Nanosci La Jolla CA 92093 USA

ISBN: (纸本)9781628415834

Research into the development of advanced RF electronics and devices having high-Temperature Superconducting (HTS) circuitry is being carried out in the Cryogenic Exploitation of RF (CERF) laboratory at SPAWAR systems Center (SSC) - Pacific. Recently, we have developed a novel annealing process wherein a film of YBa2Cu3Ox is produced having a gradient of oxygen composition along a given direction which we refer to as YBa2Cu3O del x. Such samples are intended for rapid experimental investigation of the evolution of electronic properties within the compound and in combination with structurally compatible functional oxide materials as integrated sensor devices. We present here an investigation as to the extent to which local oxygen content affects the ion milling process in the formation of Josephson junctions in the HTS compound YBa2Cu3O del x. We find an abrupt transition in the profile and depth of ion milled trenches at oxygen concentrations at and below the well ordered oxygen level, O-6:72. The method described here shows good potential for use in the fabrication of large numbers of uniform Josephson junctions in films of YBa2Cu3Ox, as either a complementary processing tool for grain boundary, step edge, or ion damaged formed JJs, or as a stand alone method for producing nano-bridge JJ's.

关键词： Josephson junctions superconducting circuits RF sensors integrated circuits optics

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Parameter tuning for a Markov-based multi-sensor system 47

Parameter tuning for a Markov-based multi-sensor system

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EUROMICRO Joint conference of 47th Software Engineering and advanced applications conference (SEAA) and 24th Digital systems Design (DSD)

作者： Qiu, Minhao Kryda, Marco Bock, Florian Antesberger, Tobias Straub, Daniel German, Reinhard Friedrich Alexander Univ Erlangen Nuremberg Dept Comp Sci 7 D-91058 Erlangen Germany Tech Univ Munich Engn Risk Anal Grp D-80333 Munich Germany Audi AG D-85045 Ingolstadt Germany

ISBN: (纸本)9781665427050

Multi-sensor systems are the key components of automated driving functions. They enhance the quality of the driving experience and assisting in preventing traffic accidents. Due to the rapid evolution of sensor technologies, sensor data collection errors occur rarely. Nonetheless, according to Safety Of The Intended Functionality (SOTIF), an erroneous interpretation of the sensor data can also cause safety hazards. For example the front-camera may not understand the meaning of a traffic sign. Due to safety concerns it is essential to analyze the system reliability throughout the whole development process. In this work, we present an approach to explore the sensor's features, such as the dependencies between successive sensor detection errors and the correlation between different sensors on the KITTI dataset quantitatively. Besides, we apply the learned parameters to a proven multi-sensor system model, which is based on Discrete-time Markov chains, to estimate the reliability of a hypothetical Stereo camera-LiDAR based sensor system.

关键词： SOTIF Automated driving Reliability analysis Multi-sensor system Discrete-time Markov chain

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Multi-sensor Airborne Imagery Collection and Processing Onboard Small Unmanned systems

Multi-Sensor Airborne Imagery Collection and Processing Onbo...

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conference on Airborne Intelligence, Surveillance, Reconnaissance (ISR) systems and applications vii

作者： von Berg, Dale Linne Anderson, Scott A. Bird, Alan Holt, Niel Kruer, Melvin Walls, Thomas J. Wilson, Michael L. USN Res Lab Washington DC 20375 USA Space Dynam Lab N Logan UT 84341 USA

ISBN: (纸本)9780819481320

FEATHAR (Fusion, Exploitation, Algorithms, and Targeting for High-Altitude Reconnaissance) is an ONR funded effort to develop and test new tactical sensor systems specifically designed for small manned and unmanned platforms (payload weight < 50 lbs). This program is being directed and executed by the Naval Research Laboratory (NRL) in conjunction with the Space Dynamics Laboratory (SDL). FEATHAR has developed and integrated EyePod, a combined long-wave infrared (LWIR) and visible to near infrared (VNIR) optical survey & inspection system, with NuSAR, a combined dual band synthetic aperture radar (SAR) system. These sensors are being tested in conjunction with other ground and airborne sensor systems to demonstrate intelligent real-time cross-sensor cueing and in-air data fusion. Results from test flights of the EyePod and NuSAR sensors will be presented.

关键词： FEATHAR EyePod NuSAR NITF geo-aware geo-rectified geo-registered UAV UAS

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