-
公开(公告)号：US07706641B2
公开(公告)日：2010-04-27
申请号：US11461917
申请日：2006-08-02
IPC分类号： G02B6/00
CPC分类号： H04B10/85
摘要： Some or all of the optical fibers of a single-mode or multi-mode cable are monitored for intrusion by transmitting through the fibers a signal which can be analyzed for changes in its characteristics which are indicative of movement as a prelude to an intrusion event. To avoid independent monitors of all of the fibers, in some cases the same light signal is looped through a plurality of the fibers in series by passive jumpers. Switches can be used to disconnect out those fibers which are compromised. As an alternative a plurality of separate monitoring signals can be provided each associated with its own sensor where unique combinations of the signals are transmitted through separate fibers allowing a higher number of fibers to be monitored than the number of signals.
摘要翻译： 监测单模或多模光缆的部分或全部光纤通过光纤传输一个信号，该信号可以分析其特性的变化，这些变化表示作为入侵事件的前奏的移动。 为了避免所有光纤的独立监视器，在某些情况下，相同的光信号通过被动跳线串联的多根光纤环绕。 开关可用于断开那些被损坏的纤维。 作为替代，可以提供多个单独的监视信号，每个独立的监视信号与其自己的传感器相关联，其中信号的独特组合通过分开的光纤传输，允许监视比信号数量更多的光纤。
-
公开(公告)号：US07634387B2
公开(公告)日：2009-12-15
申请号：US11461902
申请日：2006-08-02
IPC分类号： G06F11/30
CPC分类号： H04B10/00
摘要： A signal which varies over time is monitored to determine an alarm condition, where the sample stream of digital values from an A/D converter is divided in to equal length pieces and a Fourier Transform (FT) algorithm is used to transform each piece of the stream into a three dimensional dataset including frequency domain amplitude, frequency and time. A Frequency Envelope is calculated by taking the maxima over the time dimension for a period of time, leaving a two dimensional frequency domain amplitude vs frequency dataset which is compared with new data arriving to determine the alarm condition for each element of the Frequency Envelope either by applying a constant delta additively or multiplicatively or by using a “leaky bucket” algorithm.
摘要翻译： 监视随时间变化的信号以确定警报状况，其中来自A / D转换器的数字值的采样流被划分成相等的长度，并且使用傅里叶变换（FT）算法来变换每个 流入包括频域幅度，频率和时间的三维数据集。 通过在时间维度上取最大值来计算频率包络，留下二维频域振幅对频率数据集，与新数据比较，以确定频率包络的每个元素的报警条件，由 应用一个常量增量加乘法或通过使用“泄漏桶”算法。
-
3.发明授权Intrusion detection system for use on single mode optical fiber using a cost reduced polarimeter 有权使用降低成本的旋光仪在单模光纤上使用的入侵检测系统公开(公告)号：US07693359B2
公开(公告)日：2010-04-06
申请号：US11152663
申请日：2005-06-15
申请人： Cary R. Murphy , Mark K. Bridges , David E. Vokey
发明人： Cary R. Murphy , Mark K. Bridges , David E. Vokey
CPC分类号： H04B10/85 , G02B6/276 , H04B10/071 , H04B10/532 , H04L63/1416
摘要： A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which uses Fresnel reflections and Rayleigh backscattering to the transmit end to detect and then locate the motion. The Rayleigh backscattering time sliced data can be stored in a register until an intrusion event is detected. The detection is carried out by a polarization detection system which includes an optical splitter which is manufactured in simplified form for economic construction. This uses a non-calibrated splitter and less than all four of the Stokes parameters. It can use a polarimeter type function limited to linear and circular polarization or two linear polarizers at 90 degrees.
摘要翻译： 电信光纤通过在入侵事件之前检测光纤的操作来防止入侵。 这可以用在检测端与发射端相对的定位系统中，或者在使用菲涅尔反射和瑞利后向散射到发射端的定位系统中来检测并定位运动。 瑞利后向散射时间分片数据可以存储在寄存器中，直到检测到入侵事件。 该检测是通过偏振检测系统进行的，该偏振检测系统包括以经济构造简化形式制造的分光器。 这使用未校准的分离器和小于所有四个斯托克斯参数。 它可以使用限于线性和圆偏振的偏振计类型功能，或者使用90度的两个线性偏振器。
-
4.发明授权Intrusion detection system for use on single mode optical fiber using a storage register for data 有权用于单模光纤的入侵检测系统使用数据存储寄存器公开(公告)号：US07142737B1
公开(公告)日：2006-11-28
申请号：US11152772
申请日：2005-06-15
申请人： Cary R. Murphy , David E. Vokey , Mark K. Bridges
发明人： Cary R. Murphy , David E. Vokey , Mark K. Bridges
CPC分类号： G08B13/124 , G01M11/3181 , G01M11/39 , G02B6/2766 , G08B13/186
摘要： A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which uses Fresnel reflections and Rayleigh backscattering to the transmit end to detect and then locate the motion. The Rayleigh backscattering time sliced data can be stored in a register until an intrusion event is detected. The detection is carried out by a polarization detection system which includes an optical splitter which is manufactured in simplified form for economic construction. This uses a non-calibrated splitter and less than all four of the Stokes parameters. It can use a polarimeter type function limited to linear and circular polarization or two linear polarizers at 90 degrees.
摘要翻译： 电信光纤通过在入侵事件之前检测光纤的操作来防止入侵。 这可以用在检测端与发射端相对的定位系统中，或者在使用菲涅尔反射和瑞利后向散射到发射端的定位系统中来检测并定位运动。 瑞利后向散射时间分片数据可以存储在寄存器中，直到检测到入侵事件。 该检测是通过偏振检测系统进行的，该偏振检测系统包括以经济构造简化形式制造的分光器。 这使用未校准的分离器和小于所有四个斯托克斯参数。 它可以使用限于线性和圆偏振的偏振计类型功能，或者使用90度的两个线性偏振器。
-
5.发明授权Intrusion detection system for use on an optical fiber using a translator of transmitted data for optimum monitoring conditions 有权使用传输数据的转换器在光纤上使用的入侵检测系统，以获得最佳监测条件公开(公告)号：US07120324B2
公开(公告)日：2006-10-10
申请号：US11137776
申请日：2005-05-26
申请人： Cary R. Murphy , Mark K. Bridges , David E. Vokey
发明人： Cary R. Murphy , Mark K. Bridges , David E. Vokey
CPC分类号： H04B10/0771 , G02B6/262 , G02B6/4469
摘要： A method and system of intrusion detection system for a multimode fiber optic cable. A light signal is launched into the cable fiber to establish a narrow spectral width, under-filled non-uniform mode field power distribution in the cable. A small portion of the higher order signal modes arriving at the remote end of the cable is sampled and monitored for transient changes in the mode field power distribution. The power distribution changes with physical disturbance of the cable. When those changes are detected as being characteristic of fiber intrusion, the system activates an alarm. This method can sense and alarm any attempt to access the optical fibers in a fiber optic communication cable. In preferred embodiments, the active signal of a multimode optical fiber is monitored for both signal degradation and transient power disturbance patterns that could indicate fiber damage or physical intrusion. A translator can be provided in an existing optical fiber system in which the data signals are translated in wavelength and/or launch conditions to optimize the monitoring signals in an otherwise non-optimized system.
摘要翻译： 一种多模光缆入侵检测系统的方法和系统。 光信号被发射到电缆光纤中以在电缆中建立窄的光谱宽度，未充分的非均匀模式场分布。 到达电缆远端的较高阶信号模式的一小部分被采样并监测模场分配中的瞬态变化。 电力分配随着电缆的物理扰动而变化。 当这些变化被检测为光纤入侵的特征时，系统激活报警。 该方法可以感测和报警在光纤通信电缆中访问光纤的任何尝试。 在优选实施例中，监视多模光纤的有源信号用于可能指示光纤损坏或物理入侵的信号劣化和瞬态功率干扰模式。 可以在现有光纤系统中提供转换器，其中数据信号在波长和/或发射条件下被转换，以在另一非优化系统中优化监视信号。
-
6.发明授权Securing an optical communications network path by suppression of learned ambient disturbances 有权通过抑制学习的环境干扰来保护光通信网络路径公开(公告)号：US08233755B2
公开(公告)日：2012-07-31
申请号：US13309087
申请日：2011-12-01
申请人： Cary R. Murphy , David E. Vokey , Mark K. Bridges
发明人： Cary R. Murphy , David E. Vokey , Mark K. Bridges
CPC分类号： H04B10/85 , G02B6/276 , H04B10/071 , H04B10/532 , H04L63/1416
摘要： A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which uses Fresnel reflections and Rayleigh backscattering to the transmit end to detect and then locate the motion. The Rayleigh backscattering time sliced data can be stored in a register until an intrusion event is detected. The detection is carried out by a polarization detection system which includes an optical splitter which is manufactured in simplified form for economic construction. This uses a non-calibrated splitter and less than all four of the Stokes parameters. It can use a polarimeter type function limited to linear and circular polarization or two linear polarizers at 90 degrees.
摘要翻译： 电信光纤通过在入侵事件之前检测光纤的操作而被抵抗入侵。 这可以用在检测端与发射端相对的定位系统中，或者在使用菲涅尔反射和瑞利后向散射到发射端的定位系统中来检测并定位运动。 瑞利后向散射时间分片数据可以存储在寄存器中，直到检测到入侵事件。 该检测是通过偏振检测系统进行的，该偏振检测系统包括以经济构造简化形式制造的分光器。 这使用未校准的分离器和小于所有四个斯托克斯参数。 它可以使用限于线性和圆偏振的偏振计类型功能，或者使用90度的两个线性偏振器。
-
7.发明申请Intrusion Detection System for Use on Single Mode Optical Fiber Using a Simplified Polarimeter 有权使用简化极化仪在单模光纤上使用的入侵检测系统公开(公告)号：US20120076453A1
公开(公告)日：2012-03-29
申请号：US13309087
申请日：2011-12-01
申请人： Cary R. Murphy , David E. Vokey , Mark K. Bridges
发明人： Cary R. Murphy , David E. Vokey , Mark K. Bridges
IPC分类号： G02B6/00
CPC分类号： H04B10/85 , G02B6/276 , H04B10/071 , H04B10/532 , H04L63/1416
摘要： A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which uses Fresnel reflections and Rayleigh backscattering to the transmit end to detect and then locate the motion. The Rayleigh backscattering time sliced data can be stored in a register until an intrusion event is detected. The detection is carried out by a polarization detection system which includes an optical splitter which is manufactured in simplified form for economic construction. This uses a non-calibrated splitter and less than all four of the Stokes parameters. It can use a polarimeter type function limited to linear and circular polarization or two linear polarizers at 90 degrees.
摘要翻译： 电信光纤通过在入侵事件之前检测光纤的操作来防止入侵。 这可以用在检测端与发射端相对的定位系统中，或者在使用菲涅尔反射和瑞利后向散射到发射端的定位系统中来检测并定位运动。 瑞利后向散射时间分片数据可以存储在寄存器中，直到检测到入侵事件。 该检测是通过偏振检测系统进行的，该偏振检测系统包括以经济构造简化形式制造的分光器。 这使用未校准的分离器和小于所有四个斯托克斯参数。 它可以使用限于线性和圆偏振的偏振计类型功能，或者使用90度的两个线性偏振器。
-
8.发明授权公开(公告)号：US07333681B2
公开(公告)日：2008-02-19
申请号：US11461661
申请日：2006-08-01
申请人： Cary R. Murphy , Mark K. Bridges , David E. Vokey
发明人： Cary R. Murphy , Mark K. Bridges , David E. Vokey
IPC分类号： G02B6/00
CPC分类号： G02B6/421 , G02B6/14 , G02B6/24 , H04B10/071
摘要： A telecommunications multimode optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. Pulses are injected using a launch arrangement which generates a narrow spectral width, under-filled, non-uniform mode field power distribution in the multimode optical fiber and Fresnel reflections and Rayleigh backscattering from the pulse are detected at the transmit end to monitor the modal power distribution in the fiber which changes on manipulation of the fiber. The Rayleigh backscattering time sliced data can be stored in a register until an intrusion event is detected. The detection is carried out by a modal power distribution detection system which includes an optical coupler to tap off a portion of the light which contains the higher order signal modes.
摘要翻译： 电信多模光纤通过在入侵事件之前检测光纤的操纵来抵抗侵入。 使用发射装置注入脉冲，其在多模光纤中产生窄的光谱宽度，欠补充，不均匀的模场功率分布，并且在发射端检测来自脉冲的菲涅耳反射和瑞利反向散射以监测模态功率 纤维中的分布在纤维的操纵上改变。 瑞利后向散射时间分片数据可以存储在寄存器中，直到检测到入侵事件。 该检测是通过模式配电检测系统进行的，该系统包括光耦合器以分离包含较高阶信号模式的一部分光。
-
9.发明授权Intrusion detection system for use on single mode optical fiber using a polarimeter 有权使用旋光仪在单模光纤上使用的入侵检测系统公开(公告)号：US07206469B2
公开(公告)日：2007-04-17
申请号：US11152681
申请日：2005-06-15
申请人： Cary R. Murphy , David E. Vokey , Mark K. Bridges
发明人： Cary R. Murphy , David E. Vokey , Mark K. Bridges
CPC分类号： H04B10/85 , G02B6/276 , H04B10/071 , H04B10/532 , H04L63/1416
摘要： A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which uses Fresnel reflections and Rayleigh backscattering to the transmit end to detect and then locate the motion. The Rayleigh backscattering time sliced data can be stored in a register until an intrusion event is detected. The detection is carried out by a polarization detection system which includes an optical splitter which is manufactured in simplified form for economic construction. This uses a non-calibrated splitter and less than all four of the Stokes parameters. It can use a polarimeter type function limited to linear and circular polarization or two linear polarizers at 90 degrees.
摘要翻译： 电信光纤通过在入侵事件之前检测光纤的操作来防止入侵。 这可以用在检测端与发射端相对的定位系统中，或者在使用菲涅尔反射和瑞利后向散射到发射端的定位系统中来检测并定位运动。 瑞利后向散射时间分片数据可以存储在寄存器中，直到检测到入侵事件。 该检测是通过偏振检测系统进行的，该偏振检测系统包括以经济构造简化形式制造的分光器。 这使用未校准的分离器和小于所有四个斯托克斯参数。 它可以使用限于线性和圆偏振的偏振计类型功能，或者使用90度的两个线性偏振器。
-
公开(公告)号：US07092586B2
公开(公告)日：2006-08-15
申请号：US11137777
申请日：2005-05-26
申请人： David E. Vokey , Mark K. Bridges , Cary R. Murphy
发明人： David E. Vokey , Mark K. Bridges , Cary R. Murphy
CPC分类号： H04B10/0771 , G02B6/262 , G02B6/4469
摘要： A method and system of intrusion detection system for a multimode fiber optic cable. A light signal is launched into the cable fiber to establish a narrow spectral width, under-filled non-uniform mode field power distribution in the cable. A small portion of the higher order signal modes arriving at the remote end of the cable is sampled by use of a coupler and monitored for transient changes in the mode field power distribution. The power distribution changes with physical disturbance of the cable. When those changes are detected as being characteristic of fiber intrusion, the system activates an alarm. This method can sense and alarm any attempt to access the optical fibers in a fiber optic communication cable. In preferred embodiments, the active signal of a multimode optical fiber is monitored for both signal degradation and transient power disturbance patterns that could indicate fiber damage or physical intrusion. A translator can be provided in an existing optical fiber system in which the data signals are translated in wavelength and/or launch conditions to optimize the monitoring signals in an otherwise non-optimized system.
-
-
-
-
-
-
-
-
-
搜索结果
17 条记录 (耗时 0.031 秒)