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unattended motion detection system based on the mammalian retina

Unattended motion detection system based on the mammalian re...

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conference on unmanned and unattended sensors and sensors networks

作者： Martin-Pereda, JA Gonzalez-Marcos, AP Univ Politecn Madrid ETS Ingenieros Telcomunicac E-28040 Madrid Spain

ISBN: (纸本)0819455644

Sensing systems in living bodies offer a large variety of possible different configurations and philosophies able to be emulated in artificial sensing systems. Motion detection is one of the areas where different animals adopt different solutions and, in most of the cases, these solutions reflect a very sophisticated form. One of them, the mammalian visual system, presents several advantages with respect to the artificial ones. The main objective of this paper is to present a system, based on this biological structure, able to detect motion, its sense and its characteristics. The configuration adopted responds to the internal structure of the mammalian retina, where just five types of cells arranged in five layers are able to differentiate a large number of characteristics of the image impinging onto it. Its main advantage is that the detection of these properties is based purely on its hardware. A simple unit, based in a previous optical logic cell employed in optical computing, is the basis for emulating the different behaviours of the biological neurons. No software is present and, in this way, no possible interference from outside affects to the final behaviour. This type of structure is able to work, once the internal configuration is implemented, without any further attention. Different possibilities are present in the architecture to be presented: detection of motion, of its direction and intensity. Moreover, some other characteristics, as symmetry may be obtained.

关键词： mammalian visual cortex retina image processing motion detection

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Calibration techniques for object tracking using a compound eye image sensor

Calibration techniques for object tracking using a compound ...

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conference on unmanned and unattended sensors and sensors networks

作者： Krishnasamy, R Thomas, P Pepic, S Wong, W Hornsey, R York Univ Dept Comp Sci N York ON M3J 1P3 Canada

ISBN: (纸本)0819455644

Vanishing point and Z-tranform image center calibration techniques are reported for a prototype "compound-eye" camera system which can contain up to 25 "eyelets". One application of this system is to track a fast-moving object, such as a tennis ball, over a wide field of view. Each eyelet comprises a coherent fiber bundle with a small imaging lens at one end. The other ends of the fiber bundles are aligned on a plane, which is re-imaged onto a commercial CMOS camera. The design and implementation of the Dragonfleye prototype is briefly described. Calibration of the image centers of the eyelet lenses is performed using a vanishing point technique, achieving an error of approximately +/-0.2 pixels. An alternative technique, the Z-transform, is shown to be able to achieve similar results. By restricting the application to a two-dimensional surface, it is shown that similar accuracies can be achieved using a simple homography transformation without the need for calibrating individual eyelets. Preliminary results for object tracking between eyelets are presented, showing an error between actual and measured positions of around 3.5 mrad.

关键词： image center compound eye calibration vanishing point object tracking

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Source localization using widely separated special microphone arrays: Study of the applicability of higher order statistics

Source localization using widely separated special microphon...

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conference on unmanned and unattended sensors and sensors networks

作者： Hengy, S Naz, P Gounon, P French German Res Inst St Louis ISL F-68301 St Louis France

ISBN: (纸本)0819455644

This paper presents an application implying higher order statistics in source localization. Such techniques have been first introduced in the early 1990's. Some interesting properties of higher order statistics are exploited in zone survey applications. A large global array constituted by a set of moving sub-arrays (soldiers wearing a Head Equipment (HE) equipped with one or more microphones, a GPS receiver and a magnetometer) allows the localization of the menaces near a survey zone. Studying a large global array, with second order statistics high resolution localization techniques, the local informations are not significant enough in order to have an influence on the estimation of the position of the acoustic sources (for instance, the orientation of the HE has no influence on the estimation of the position of the sources). We expect that the use of higher order statistics and their properties concerning especially the virtual equivalent network (VEN) will improve the significance of these local information and thus, allow to have a better estimation of the source position. A first study has been based on simulations, and then, some results with real data, collected in october 2003, are presented.

关键词： moving network of acoustic sensors special Head Equipment high resolution localization higher order statistics virtual equivalent network (VEN)

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sensors' network and its application in the intelligent storage security

Sensors' network and its application in the intelligent stor...

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conference on unmanned and unattended sensors and sensors networks

作者： Zhang, QY Nicolescu, M Jiang, X Zhang, Y Yue, WH Xiao, WH Wuhan Univ Technol Coll Logist Engn Wuhan 430063 Peoples R China

ISBN: (纸本)0819455644

Intelligent storage systems run on different advanced technologies, such as linear layout, business intelligence and data mining. Security, the basic desire of the storage system, has been focused on with the indraught of multimedia communication technology and sensors' network. Along with the developing of science and the social demands, multifarious alarming system has been designed and improved to be intelligentized, modularized and have network connections. It is of great moment to make the storage, and further more, the logistics system more and more efficient and perfect, with modem science and technology. Diversified information on the spot should be caught by different kinds of sensors. Those signals are treated and communicated to the control center to give the further actions. For fire-proofing, broad-spectrum gas sensors, fume sensors, flame sensors and temperature sensors are used to catch the information in their own ways. Once the fire is taken somewhere, the sensors work by the fume, temperature, and flame as well as gas immediately. Meanwhile the intelligent control system starts. It passes the tidings to the center unit. At the same time, it sets those movable walls on to work quickly to obstruct the fire's spreading. While for guarding the warehouse against theft, cut-off sensors, body sensors, photoelectric sensors, microwave sensors and closed-circuit television as well as electronic clocks are available to monitor the warehouse reasonably. All of those sensors work in a net way. The intelligent control system is made with a digital circuit instead of traditional switch one. This system can work in a better way in many cases. Its reliability is high and the cost is low.

关键词： intelligent storage systems security fire-proof network

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Defending networks against denial of service attacks

Defending networks against denial of service attacks

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conference on unmanned and unattended sensors and sensors networks

作者： Gelenbe, E Gellman, M Loukas, G Univ London Imperial Coll Sci Technol & Med Dept Elect & Elect Engn London SW7 2AZ England

ISBN: (纸本)0819455644

Denial of service attacks, viruses and worms are common tools for malicious adversarial behaviour in networks. Experience shows that over the last few years several of these techniques have probably been used by governments to impair the Internet communications of various entities, and we can expect that these and other information warfare tools will be used increasingly as part of hostile behaviour either independently, or in conjunction with other forms of attack in conventional or asymmetric warfare, as well as in other forms of malicious behaviour. In this paper we concentrate on Distributed Denial of Service Attacks (DDoS) where one or more attackers generate flooding traffic and direct it from multiple sources towards a set of selected nodes or IP addresses in the Internet. We first briefly survey the literature on the subject, and discuss some examples of DDoS incidents. We then present a technique that can be used for DDoS protection based on creating islands of protection around a critical information infrastructure. This technique, that we call the CPN-DoS-DT (Cognitive Packet networks DoS Defence Technique), creates a self-monitoring sub-network surrounding each critical infrastructure node. CPN-DoS-DT is triggered by a DDoS detection scheme, and generates control traffic from the objects of the DDoS attack to the islands of protection where DDOS packet flows are destroyed before they reach the critical infrastructure. We use mathematical modelling, simulation and experiments on our test-bed to show the positive and negative outcomes that may result from both the attack, and the CPN-DoS-DT protection mechanism, due to imperfect detection and false alarms.

关键词： information warfare Internet packet networks denial of service Cognitive Packet networks

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Capability and potential of disposable organic sensor networks

Capability and potential of disposable organic sensor networ...

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2004 IEEE Aerospace conference Proceedings

作者： Beale, Dean A.R. Hume, Andrew L. QinetiQ St Andrews Rd Malvern Worcs WR14 3PS

The maturity of unattended Ground sensor (UGS) technologies is accelerating as the range of fully funded military applications increases. These applications however can still suffer from the Stovepipes of the past and UGSs still cannot claim to be a panacea for remote engagement of enemy forces. Presented in this paper is a vision of the emergence of Disposable Organic sensors Network (DOSNs) systems. This paper will discuss the reasons, drivers and technologies that support this concept and discuss some of the platform tradeoffs that can enable the correct balance between the different platform types. This paper is supported by trial and testing results from both the platforms and sensors perspective, and draws on the development and capability of low cost UGS, unmanned Air Vehicles (UAV) and unmanned Ground Vehicles (UGV) technologies funded by the UK Ministry of Defence (MOD).

关键词： Remote sensing

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Tactical unmanned aerial vehicle localization using ground-based acoustic sensors

Tactical unmanned aerial vehicle localization using ground-b...

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Intelligent sensors, sensor networks and Information Processing conference (ISSNIP)

作者： K.W. Lo B.G. Ferguson Maritime Operations Division Defence Science and Technology Organisation Pyrmont NSW Australia

Tactical unmanned aerial vehicles (TUAV) are low observable aircraft that are susceptible to acoustic detection by unattended ground sensors because of the high levels of radiated noise generated by the propulsion mechanism (engine and propeller). This paper presents an acoustic signature analysis of a typical TUAV and demonstrates, using real data, the potential of both narrowband and broadband single-sensor based methods for estimating the flight parameters of a TUAV. Also, a broadband cross-correlation technique is applied to the sensor signals of a 3-element circular array to estimate the angular trajectory of a transiting TUAV.

关键词： unmanned aerial vehicles Acoustic sensors Aircraft propulsion sensor arrays Acoustic signal detection Vehicle detection Acoustic noise Noise generators Noise level Engines

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Capability and potential of disposable organic sensor networks

Capability and potential of disposable organic sensor networ...

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IEEE conference on Aerospace

作者： D.A.R. Beale A.L. Hume Worcestershire UK

The maturity of unattended ground sensor (UGS) technologies is accelerating as the range of fully funded military applications increases. These applications however can still suffer from the stovepipes of the past and UGSs still cannot claim to be a panacea for remote engagement of enemy forces. Presented in This work is a vision of the emergence of disposable organic sensors network (DOSNs) systems. This work discusses the reasons, drivers and technologies that support this concept and discuss some of the platform tradeoffs that can enable the correct balance between the different platform types. This paper is supported by trial and testing results from both the platforms and sensors perspective, and draws on the development and capability of low cost UGS, unmanned air vehicles (UAV) and unmanned ground vehicles (UGV) technologies funded by the UK Ministry of Defence (MOD).

关键词： Costs Surveillance sensor systems unmanned aerial vehicles Intelligent sensors Biosensors Remote monitoring Radar detection Acceleration Testing

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An assessment of multi-static radar remote sensor networks

An assessment of multi-static radar remote sensor networks

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IEEE conference on Aerospace

作者： D.A.R. Beale A.L. Hume J. Cage P. Williams QinetiQ Limited Malvern Worcestershire UK

Bistatic radar has been considered for many years as an element of ground based air defense systems to counter against low observable airframes. To achieve these benefits, it is necessary to deploy the network of bistatic radar elements across an area where a large proportion of the reflected energy is anticipated. For security and vulnerability reasons this network is typically deployed within safe, protected areas. This requirement limits the range of applications to which bistatic and multi-static radar can be applied. The recent emergence of unattended ground sensors (UGS) and uninhabited air vehicle (UAV), systems shows that these platforms are sufficiently mature for consideration as remote receiver/transmitter sites. However for this to be realized it is essential that the cost, capability and vulnerability of these sensors is considered. Within This work a multi-static radar tool which is used to compare a range of multi-static radar network distributions is described. This tool is used to assess detection capability and hence indicate comparative costs for two geometric targets frying a linear path.

关键词： Radar remote sensing Remote sensing Bistatic radar unmanned aerial vehicles Costs Counting circuits Protection Radar applications sensor systems Land vehicles

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UAV cooperation architectures for persistent sensing

UAV cooperation architectures for persistent sensing

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conference on sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Defense and Law Enforcement II

作者： Roberts, RS Kent, CA Cunningham, CT Jones, ED Lawrence Livermore Natl Lab Livermore CA 94550 USA

ISBN: (纸本)081944930X

With the number of small, inexpensive unmanned Air Vehicles (UAVs) increasing, it is feasible to build multi-UAV sensing networks. In particular, by using UAVs in conjunction with unattended ground sensors, a degree of persistent sensing can be achieved. With proper UAV cooperation algorithms, sensing is maintained even though exceptional events, e.g.,. the loss of a UAV. have occurred. In this paper a cooperation architecture is described that allow's multiple UAVs to perform coordinated, persistent sensing with unattended ground sensors over a wide area. This architecture automatically adapts the UAV paths so that on the average, the amount of time that any sensor has to wait for a UAV revisit is minimized. We also describe the Simulation, Tactical Operations and Mission Planning (STOMP) software. STOMP is designed to help simulate and operate distributed sensor networks where multiple UAVs are used to collect data.

关键词： unmanned air vehicles robot cooperation automated sensing distributed sensing

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