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1. 发明公开

EP1996794A1 ACOUSTIC TELEMETRY 审中-公开
标题翻译：声学遥测
公开(公告)号：EP1996794A1
公开(公告)日：2008-12-03
申请号：EP07732062.0
申请日：2007-03-20
申请人： Quinetiq Limited
发明人： DALTON, Roger, Patrick , WATERS, Matthew , JAMIESON, Ian, Andrew
IPC分类号： E21B47/16
CPC分类号： E21B47/16
摘要： A method of transmitting data acoustically through a tubular structure, such as a drill string or production tubing in an oil or gas well, predominantly comprising a series of tubing sections (1) joined end to end by couplings (2), at least a preponderance of the tubing sections having an axial length of at least a dimension X between couplings and at least a preponderance of the couplings having an axial length of no more than a dimension x, where X is substantially greater than x. The method comprises propagating acoustic signals along the structure, between transducers (9,10) over a distance N of at least 10X, in the form of tone bursts at least predominantly comprising a selected guided wave mode (preferably the L(0, 1) mode at low frequency) with a wavelength of at least 2x, and each burst having a temporal length of substantially less than 2N/C and preferably no more than 2X/C, where C is the phase velocity of the selected mode. In this way interference problems associated with Brillouin scattering in such structures can be overcome without excessive power consumption.

2. 发明公开

EP1941479A1 TRAFFIC SENSING AND MONITORING APPARATUS 有权转让
标题翻译：设备进行流量检测和流量监控
公开(公告)号：EP1941479A1
公开(公告)日：2008-07-09
申请号：EP06794805.9
申请日：2006-10-18
申请人： Quinetiq Limited
发明人： CRICKMORE, Roger, Ian , HILL, David, John
IPC分类号： G08G1/02
CPC分类号： G08G1/02 , G01D5/35361
摘要： Traffic sensing and monitoring apparatus (100) comprises a length of optical fibre (112), means (102, 103, 104, 106, 107, 109, 119) arranged to introduce a series of pulse pairs into an input end of the length, each of the pulse pairs comprising first and second pulses of radiation having a frequency difference Ω and the second pulse being delayed with respect to the first by a delay τ, and the apparatus further comprising a photodetector arranged to detect radiation which is Rayleigh-backscattered within the length of fibre towards the input end to generate an output signal in response thereto. Apparatus of the invention allows sensing and monitoring of traffic at any position along a long length of road (e.g. 5km) with lower installation and maintenance costs per unit length compared to prior art systems providing the same spatial resolution.

3. 发明公开

EP1443347A2 Single mode optical fibre 失效
标题翻译：单模光纤
公开(公告)号：EP1443347A2
公开(公告)日：2004-08-04
申请号：EP04009506.9
申请日：1998-06-17
申请人： QuinetiQ Limited
发明人： Birks, Timothy Adam , Knight, Jonathan Cave , Russell, Philip St. John
IPC分类号： G02B6/16 , H01S3/067 , H04B10/00
CPC分类号： C03B37/01205 , B82Y20/00 , C03B2201/34 , C03B2203/14 , C03B2203/42 , G02B6/02 , G02B6/02333 , G02B6/02347 , G02B6/02361 , G02B6/02371 , G02B6/02385 , G02B6/1225 , G02B6/4296 , H01S3/06708
摘要： A large core photonic crystal fibre for transmitting radiation having a core comprising a substantially transparent core material and having a core diameter of at least 5 µm. The fibre also comprises a cladding region surrounding the length of core material, wherein the cladding region comprises a first substantially transparent cladding material, having a first refractive index, and wherein the first substantially transparent cladding material has embedded along its length a substantially periodic array of holes, wherein the holes are filled with a second cladding material having a second refractive index less than the first refractive index, such that radiation input to the optical fibre is transmitted along the length of the core material in a single mode of propagation. In a preferred embodiment, the core diameter may be at least 20 µm, and may be as large as 50 µm. The fibre is capable of transmitting higher power radiation than conventional fibres, whilst maintaining propagation in a single mode.
The core material may doped with a material capable of providing amplification under the action of pump radiation input to the fibre. The invention also relates to a fibre amplifier and a fibre laser comprising a doped large core photonic crystal fibre. The fibre may also be used in a system for transmitting radiation comprising a plurality of lengths of large core photonic crystal fibre, separated by large core photonic crystal fibre amplifiers, such that the power of radiation transmitted through the system is maintained above a predetermined threshold power.
摘要翻译：一种用于传输辐射的大芯光子晶体光纤，其具有包括基本上透明的芯材料和芯直径至少为5μm的芯。该光纤还包括围绕芯材料长度的包层区域，其中包层区域包括具有第一折射率的第一基本上透明的包层材料，并且其中第一基本上透明的包层材料沿其长度嵌入基本上周期性的其中孔填充有具有小于第一折射率的第二折射率的第二包层材料，使得输入到光纤的辐射沿着芯材料的长度以单一传播模式传输。在一个优选实施例中，芯部直径可以至少为20μm，并且可以大至50μm。该光纤能够传输比传统光纤更高的功率辐射，同时保持单模传播。核心材料可以掺入能够在泵浦辐射输入到光纤的作用下提供放大的材料。本发明还涉及包括掺杂大芯光子晶体光纤的光纤放大器和光纤激光器。光纤还可以用于传输辐射的系统，该系统包括由大芯核光子晶体光纤放大器分开的多个长度的大芯光子晶体光纤，使得通过系统传输的辐射的功率保持在预定阈值功率以上。

4. 发明公开

EP2245788A1 MULTI -COMMUNITY NETWORK WITH QUANTUM KEY DISTRIBUTION 有权转让
标题翻译：与量子密钥分配多个社区网络
公开(公告)号：EP2245788A1
公开(公告)日：2010-11-03
申请号：EP09703427.6
申请日：2009-01-23
申请人： Quinetiq Limited
发明人： WISEMAN, Simon, Robert , LOWANS, Brian, Sinclair , OAK, Richard, Andrew
IPC分类号： H04L9/08
CPC分类号： H04B10/70 , H04L9/065 , H04L9/0805 , H04L9/0833 , H04L9/0855 , H04L9/0883
摘要： This invention relates to an optical star network in which different communities of users, such as different businesses, are provided through use of quantum key distribution (QKD). At least one QKD device (204) is located at the central hub of the star network and communicates with QKD devices (212) at the endpoints to establish a separate quantum key, i.e. a cryptographic key established by QKD, with each endpoint. A separate key manager (206, 208) is provided for each different community and each key manager is arranged to use the appropriate quantum keys for endpoints within that community to deliver the same community key to each endpoint. This community key can be used by for encrypting network traffic between members of the same community with security. Traffic passing through the network switch (102) is encrypted, but the community keys are not delivered via the switch and hence the switch an error in the switch does not compromise security.

5. 发明公开

EP2233879A2 Insensitive munition 有权转让
标题翻译：未命令武装
公开(公告)号：EP2233879A2
公开(公告)日：2010-09-29
申请号：EP10250511.2
申请日：2010-03-18
申请人： Quinetiq Limited
发明人： Haskins, Peter John
IPC分类号： F42B12/20
CPC分类号： F42B12/207 , F42B12/208 , F42C19/0846
摘要： This invention relates to a novel insensitive munition (1) comprising one warhead and also munitions comprising one or more warheads (1). In particular, the invention lies in the field of insensitive munition warheads (1). There are further provided methods of preparing the warheads of the invention, methods of controllably detonating the warheads and a kit suitable for preparing such a warhead. The warhead (1) comprises at least two portions (3) of high explosive separated by a non-detonative material (8), wherein each portion (3) has a cross section below its critical detonation cross section, and wherein the at least two portions (3) are arranged such that the total cross section of the at least two portions (3) exceeds the critical detonation cross section of said high explosive, such that in use only simultaneous detonation of the at least two high explosives (3) causes detonation to occur.
摘要翻译：本发明涉及一种新颖的不灵敏弹药（1），其包括一个弹头，以及包括一个或多个弹头（1）的弹药。特别是，本发明在于弹道弹头领域（1）。还提供了制备本发明的弹头的方法，可控制地引爆弹头的方法和适于制备这种弹头的试剂盒。弹头（1）包括由非爆炸材料（8）分开的至少两个高爆炸部分（3），其中每个部分（3）具有低于其临界爆炸横截面的横截面，并且其中所述至少两个部分（3）布置成使得至少两个部分（3）的总横截面超过所述高爆炸物的临界爆炸横截面，使得在使用中只有同时爆炸至少两个高爆炸物（3）导致引爆发生。

6. 发明公开

EP2181573A2 COMPOSITE MATERIAL 有权转让
标题翻译：复合材料
公开(公告)号：EP2181573A2
公开(公告)日：2010-05-05
申请号：EP08788331.0
申请日：2008-08-15
申请人： Quinetiq Limited
发明人： HUSSAIN, Shahid , ROBERTS, Philip, Mark, Shryane , HOBSON, Peter, Allen
IPC分类号： H05K9/00
CPC分类号： H05K9/0083 , H01F41/0246 , H01Q17/00
摘要： A composite material comprises magnetic particles dispersed in electrically insulating material. The magnetic particles have an aspect ratio greater than 1 (preferably greater than 10) and a concentration sufficiently high to produce negative permeability. The magnetic particles may be magnetic flakes of reduced carbonyl iron of average diameter 50μm, average thickness 1 μm and aspect ratio 50, the magnetic flakes being at least 25 % by volume of the composite material. The magnetic flakes may be aligned to produce enhanced permeability. The electrically insulating material may be paraffin wax, particulate PTFE, or another polymer. To control permittivity, the composite material may include an electrically conducting component such as graphite or conductive coatings upon the magnetic flakes.
摘要翻译：复合材料包含分散在电绝缘材料中的磁性颗粒。磁性颗粒具有大于1（优选大于10）的纵横比和足够高的浓度以产生负磁导率。磁性颗粒可以是平均直径为50μm，平均厚度为1μm且长宽比为50的还原羰基铁的磁性薄片，磁性薄片为复合材料的至少25体积％。磁片可以对准以产生增强的渗透性。电绝缘材料可以是石蜡，粒状PTFE或另一种聚合物。为了控制介电常数，复合材料可以包括诸如石墨的导电组分或磁性薄片上的导电涂层。

7. 发明公开

EP1356607A1 SIGNAL DETECTION USING A PHASED ARRAY ANTENNA 审中-公开
标题翻译：与相控阵天线信号检测
公开(公告)号：EP1356607A1
公开(公告)日：2003-10-29
申请号：EP02715580.3
申请日：2002-01-28
申请人： Quinetiq Limited
发明人： WATSON, Stephen , DEAN, Michael , WALLACE, Neil , SMITH, Andrew
IPC分类号： H04B7/08 , H01Q3/24
CPC分类号： H01Q3/24 , H04B7/086
摘要： A method, and associated apparatus, for reading information from a transmitter (70) using a phased array antenna (76) wherein adjustment of the phased array antenna providing an RF link is performed in a period when the incident signal contains no information. In one embodiment, the method and apparatus are employed to receive and track an FM video signal transmitted by a mobile television radio-camera.

8. 发明公开

EP2248318A2 NETWORK HAVING QUANTUM KEY DISTRIBUTION 有权转让
标题翻译：与量子密钥分配网络
公开(公告)号：EP2248318A2
公开(公告)日：2010-11-10
申请号：EP09703191.8
申请日：2009-01-23
申请人： Quinetiq Limited
发明人： WISEMAN, Simon, Robert , LOWANS, Brian, Sinclair
IPC分类号： H04L29/06 , H04L9/08
CPC分类号： H04L63/061 , H04L9/0855
摘要： The present invention relates to a method of performing quantum key distribution across a network, in particular between a first node (202a) and a destination node (202b) connected via at least one intermediate node (204). The method involves the first node (202a) first agreeing a quantum key, i.e. a cryptographic key derived by QKD with the first intermediate node in the path (204) using any known QKD technique. Next the intermediate node (204) exchanges a quantum signal, for instance a series of suitably randomly modulated signal photons, with the next node (202b) in the path - which is termed the targeted node. The intermediate node (204) communicates with the first node (202a) using the previous established quantum key details of the quantum signal sent or received by the intermediate node (204). The first node then performs a key agreement step to agree a quantum key directly with the targeted node. In this way the first node is involved in the authentication step to avoid man in the middle type attacks. Having established a quantum key with the current targeted node the method can be repeated but with the next node in the network path as the targeted node until the destination node is reached. The final quantum key agreed with the destination node can then be used for encrypting communication between those nodes across the network.

9. 发明公开

EP2245789A2 QUANTUM CRYPTOGRAPHY APPARATUS 有权转让
标题翻译：量子密码装置
公开(公告)号：EP2245789A2
公开(公告)日：2010-11-03
申请号：EP09703693.3
申请日：2009-01-23
申请人： Quinetiq Limited
发明人： WISEMAN, Simon, Robert , LOWANS, Brian, Sinclair , HICKS, Richard, Middleton
IPC分类号： H04L9/08
CPC分类号： H04L9/0855 , H04L9/0852
摘要： The present invention relates to methods and apparatus for performing quantum key distribution (QKD). The method of the present invention involves exchange of a quantum signal, such as a suitably modulated series of single photons, between a first quantum node (304) and a second quantum node (306) as is usual in known QKD scheme. In the present invention however the first quantum node communicates details of the quantum signal it sent or received with a first remote node 302. The first remote node thus has all the information to required to take the place of the first quantum node in the key agreement step with the second quantum node. The first quantum node (304) may be arranged to transmit the quantum signal to the second quantum node (306), in which case the invention provides a distributed quantum transmitter with the control logic (202) in the first remote node being distributed remotely from the actual quantum transmitter (204) in the first quantum node (304). Communications between the first remote node (302) and first quantum node (304) may comprise or be protected by a quantum key derived by conventional QKD.

10. 发明公开

EP1704492A1 AUTOMATED ANOMALY DETECTION 审中-公开
标题翻译： AUTOMATED异常检测
公开(公告)号：EP1704492A1
公开(公告)日：2006-09-27
申请号：EP04798629.4
申请日：2004-11-22
申请人： Quinetiq Limited
发明人： LOCK , Zoe, Paula c/o Qinetiq Ltd. , PEELING, Emma, Cecilia c/o Qinetiq Ltd. , THIE, Claire, Julia c/o Qinetiq Ltd. , BROWN, Neil, Christopher, Charles c/o Qinetiq Ltd. , HATCH, Richard c/o Qinetiq Ltd. , HOOD, Alan c/o Qinetiq Ltd. , KILVINGTON, Simon c/o Qinetiq Ltd. , ZAKIUDDIN, Mohammed, Irfan c/o Qinetiq Ltd.
IPC分类号： G06F15/18
CPC分类号： G06N5/025 , G06F11/0754 , G06N3/126
摘要： A method of anomaly detection applicable to telecommunications or retail fraud or software vulnerabilities uses inductive logic programming to develop anomaly characterization rules from relevant background knowledge and a training data set, which includes positive anomaly samples of data covered by rules. Data samples include 1 or 0 indicating association or otherwise with anomalies. An anomaly is detected by a rule having condition set which the anomaly fu,lfils. Rules are developed by addition of conditions and unification of variables, and are filtered to remove duplicates, equivalents, symmetric rules and unnecessary conditions. Overfitting of noisy data is avoided by an encoding cost criterion. Termination of rule construction involves criteria of rule length, absence of negative examples, rule significance and accuracy, and absence of recent refinement. Iteration of rule construction involves selecting rules with unterminated construction, selecting rule refinements associated with high accuracies, and iterating a rule refinement, filtering and evaluation procedure to identify any refined rule usable to test data. Rule development may use first order logic or Higher Order logic.

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