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

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The Art and Science of Missile Defense sensor Design

The Art and Science of Missile Defense Sensor Design

引用

conference on sensors and systems for Space applications vii

作者： McComas, Brian K. Raytheon Missile Syst Tucson AZ 85756 USA

ISBN: (纸本)9781628410228

A Missile Defense sensor is a complex optical system, which sits idle for long periods of time, must work with little or no on-board calibration, be used to find and discriminate targets, and guide the kinetic warhead to the target within minutes of launch. A short overview of the Missile Defense problem will be discussed here, as well as, the top-level performance drivers, like Noise Equivalent Irradiance (NE!), Acquisition Range, and Dynamic Range. These top-level parameters influence the choice of optical system, mechanical system, focal plane array (FPA), Read Out Integrated Circuit (ROIC), and cryogenic system. This paper will not only discuss the physics behind the performance of the sensor, but it will also discuss the "art" of optimizing the performance of the sensor given the top level performance parameters. Balancing the sensor sub-systems is key to the sensor's performance in these highly stressful missions. Top-level performance requirements impact the choice of lower level hardware and requirements. The flow down of requirements to the lower level hardware will be discussed. This flow down directly impacts the FPA, where careful selection of the detector is required. The flow down also influences the ROIC and cooling requirements. The key physics behind the detector and cryogenic system interactions will be discussed, along with the balancing of subsystem performance. Finally, the overall system balance and optimization will be discussed in the context of missile defense sensors and expected performance of the overall kinetic warhead.

关键词： Missile Defense Electro-Optical sensor FPA Cryogenic System sensor Performance

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sensor protection against laser dazzling

Sensor protection against laser dazzling

引用

conference on Electro-Optical and Infrared systems - Technology and applications vii

作者： Ritt, Gunnar Eberle, Bernd Syst Technol & Image Exploitat IOSB Fraunhofer Inst Optron D-76275 Ettlingen Germany

ISBN: (纸本)9780819483522

Laser dazzling of electro-optical sensors states a serious problem. Especially when navigational tasks shall be fulfilled a disturbance of the sight is inacceptable. Classical protection measures like e. g. laser safety filters usually lack of the drawback of color distortion and a considerable loss in transmission. Therefore, new protection concepts should be aspired which are independent of the laser wavelength and do not affect the vision. In this paper we discuss a novel concept to protect electro-optical sensors against laser dazzling based on spatial light modulator technology and wavelength multiplexing. In particular, the method is suited as a protection measure against continuous wave laser sources.

关键词： sensor protection laser dazzling spatial light modulator wavelength multiplexing

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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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Infrared uncooled cameras used in multi-sensor systems for perimeter protection

Infrared uncooled cameras used in multi-sensor systems for p...

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conference on Electro-Optical and Infrared systems - Technology and applications vii

作者： Dulski, R. Szustakowski, M. Kastek, M. Ciurapinski, W. Trzaskawka, P. Zyczkowski, M. Mil Univ Technol Inst Optoelect PL-00908 Warsaw Poland

ISBN: (纸本)9780819483522

The recent necessity to protect military bases, convoys and patrols gave serious impact to the development of security systems for perimeter protection. The application of multi-sensor increases functionality and performance of the whole system. Effective ranges of detection depend on the class of the sensor used and the observed scene itself. One of the most important devices used in such systems are IR cameras. Application of IR camera increases the probability of intruder detection regardless of the time of day or weather conditions. It also increases the probability of intruder detection and simultaneously decreased the false alarm rate produced by the system. The paper discusses technical possibilities and limitations to use uncooled IR camera in a multi-sensor system for perimeter protection. The role of IR cameras in the system was discussed as well as technical possibilities to detect human being. The operational distances for perimeter protection are rather high, considering parameters of commercially available thermal cameras. Comparison of exemplary IR cameras, capable to achieve desired ranges was done. The required spatial resolution for detection, recognition and identification was calculated. The simulation of detection ranges was done using NVTherm software. The results of analysis and simulations were finally presented.

关键词： IR cameras perimeter protection detection range sensor fusion

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Disposable sensors: technical and operational challenges facing military employment

Disposable sensors: technical and operational challenges fac...

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conference on Unattended Ground sensor Technologies and applications vii

作者： Nocita, SK Bales, JM USA RDECOM CERDEC NVESD Ft Belvoir VA 22060 USA

ISBN: (纸本)0819457817

Advances in technologies are providing opportunities to increase situational awareness in military operations. One application of these technologies is small disposable sensor systems that have the potential to enhance the war-fighter's lethality and survivability. Considering that the sensors must be disposable, cost constraints increase the complexity of solving the technical and operational challenges. This paper will address two areas of consideration when designing disposable sensor systems: technical and operational. Technical design considerations: sensor communication networks are a hot area of development, with a multitude of standards and protocols to choose from. Miniaturization is providing a multitude of sensor modalities that can be considered for a disposable sensor. Decisions must be made between factors such as cost, size, and power requirements. Power management through hardware and software, coupled with more efficient batteries, is giving extended life to sensor systems. Environmental issues must be addressed in a disposable system. Operational design considerations: For systems monitored and managed directly by soldiers, one of the most important elements is the user interface, and its affect on overall system ease-of-use. System usefulness is also affected by the capability to autonomously monitor the area where sensors are deployed without a soldier present. The packaging of sensors will be affected by the current state of technology integrated into the sensors, as well as requirements for emplacement. These emplacement requirements and constraints will impact the operational effectiveness of the overall system.

关键词： disposable sensor soldier ease-of-use communications network protocols wireless emplacement

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An efficient sliding window algorithm for detection of sequential patterns 8

An efficient sliding window algorithm for detection of seque...

引用

8th International conference on Database systems for advanced applications

作者： Harada, L Fujitsu Labs Ltd Nakahara Ku Kawasaki Kanagawa 2118588 Japan

ISBN: (纸本)0769518958

Recently a growing number of applications monitor the physical world by tracking sensor data and detecting values, trends or patterns of interest. In this paper we focus on the problem of detecting sequential patterns with complex predicates over sensor data, and present an algorithm that efficiently pre-computes which pattern predicates' checks can be skipped at query compile-time, so that the processing window can slide with only necessary checks being actually performed against the sensor data at run-time. Implementation and evaluation of the proposed approach confirms its efficiency when compared to previously proposed approaches.

关键词： Biomedical monitoring Feeds Laboratories Medical treatment Runtime sensor phenomena and characterization Telecommunication traffic Temperature distribution Temperature measurement Temperature sensors

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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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ScP Protocol for Wireless sensor Networks 5

ScP Protocol for Wireless Sensor Networks

引用

5th International conference on advanced Computing and Communication systems (ICACCS)

作者： Radha, S. Vineetha, Wilson Nagabushanam, P. Darshana, S. Bala, G. Josemin Karunya Inst Technol & Sci Dept ECE Cbe India Karunya Inst Technol & Sci Dept EEE Cbe India

ISBN: (纸本)9781538695333

Wireless sensor Network finds major role in military applications, animal farming, urban surveillance etc. Energy Consumption and transmit power optimization are the major challenges. In this work, we have proposed a new contention aware protocol (ScP) to reduce energy consumption in the network. Contention period is slotted to avoid collisions during transmission. This also increases network lifetime and the duty cycle by approximately a factor of 10. Evaluations are done using NS-2.35 and its applicability for various routing protocols are checked. ScP shows better performance in energy, throughput, PDR and network lifetime.

关键词： Energy Efficiency Routing Protocols WSN (Wireless sensor Networks) PDR Throughput

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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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Prediction-Coverage-First Detection Scheduling for Energy Efficient Multi-Target Tracking

Prediction-Coverage-First Detection Scheduling for Energy Ef...

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International conference on advanced Robotics and Intelligent systems (ARIS)

作者： Huang, Cheng-Sen Huang, Shi-Ting Chen, Cheng-Yu Chen, Jen-Yeu Natl Dong Hwa Univ Dept Elect Engn Hualien 97401 Taiwan

ISBN: (纸本)9781479918515

Target tracking is an important application in Wireless sensor Networks or Internet of Things. In most applications, a large number of inexpensive and stationary sensor nodes are deployed randomly in a field to cooperatively monitor the intrusive targets that are able to move around the field. To save energy depletion, sensor nodes are in sleep mode in most of the time while they should be waked up. When a moving target is in their proximity. It needs at least three sensor nodes cooperatively work together to precisely locate a target. However, too many awake sensor nodes will not help the localization and tracking process but only waste sensor node's energy. Thus, in this paper, a cluster-based tracking algorithm is proposed. In this algorithm, a trajectory prediction scheme is designed to forecast the positions of the targets of interest as a probability measure, based on which suitable sensor nodes are waked up to keep on tracking and locating the targets of interest. The duty cycle, namely the sampling interval, is also decided to ensure the successful tracking rate. Our extensive simulation results show that our algorithm PCF outperforms the representative multi-target tracking algorithm, DMMT, in the literature.

关键词： sensor nodes

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