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    • 1. 发明申请
    • Distributed sensor system coupled with a plurality of secondary sensors
    • 与多个二次传感器耦合的分布式传感器系统
    • US20060239603A1
    • 2006-10-26
    • US11151334
    • 2005-06-13
    • Jayantilal PatelZhizhong ZhuangYuri ZadorozhnyYoung Kim
    • Jayantilal PatelZhizhong ZhuangYuri ZadorozhnyYoung Kim
    • G02B6/00
    • G08B13/186G08B13/126G08B13/2491
    • An intrusion detection system with a distributed sensor system coupled with a plurality of secondary sensors is disclosed. The distributed sensor is deployed over a protected zone, and detects physical disturbances caused by intrusion into the zone. A plurality of physical disturbing devices is coupled to the distributed sensor to physically disturb the distributed sensor. A plurality of secondary sensors is employed as additional sensors to volumetrically extend the sensing zone, and is coupled with physically disturbing devices. A secondary sensor sends a signal to an associated physically disturbing device upon detecting an event to be monitored, and the signal operates the physically disturbing device to produce a physical disturbance that will be detected by the distributed sensor. Location of the event is identified by analyzing the disturbance and consequently by locating the physically disturbing device and the associated secondary sensor.
    • 公开了一种具有与多个二次传感器耦合的分布式传感器系统的入侵检测系统。 分布式传感器部署在受保护区域上,并且可以检测到入侵区域造成的物理扰动。 多个物理干扰装置耦合到分布式传感器以物理地干扰分布式传感器。 使用多个二次传感器作为附加的传感器来体积地延伸感测区域,并且与物理上干扰的设备耦合。 次级传感器在检测到要监视的事件时将信号发送到相关联的物理干扰设备,并且该信号操作物理干扰设备以产生将由分布式传感器检测到的物理扰动。 通过分析干扰并因此通过定位物理干扰装置和相关的次级传感器来识别事件的位置。
    • 2. 发明申请
    • Phase Responsive Optical Fiber Sensor
    • 相位光纤传感器
    • US20070253662A1
    • 2007-11-01
    • US11570481
    • 2005-04-01
    • Jayantilal PatelZhizhong ZhuangYuri Zadorozhny
    • Jayantilal PatelZhizhong ZhuangYuri Zadorozhny
    • G02B6/10
    • G01M11/39G02B6/2766G08B13/184G08B13/186G08B13/2491H04B10/0771
    • The location of a physical disturbance along an optical waveguide is determined by measuring different propagation times for the resulting phase variation to propagate to phase responsive receivers at ends of bidirectional signal paths. Each receiver can have a coupler that functions as a beam combiner and as a beam splitter inserting the opposite signal. On each receiving end, the coupler provides one or more detectors with signals from which phase related independent variable values are taken, processed and mapped to phase angles. Relative phase angle versus time is derived for each opposite signal pair and correlated at a time difference, i.e., a difference in propagation time from which the location of the disturbance is resolved. Polarization sensitive and polarization insensitive examples are discussed with various optical fiber arrangements.
    • 沿着光波导的物理扰动的位置通过测量所得到的相位变化的不同传播时间来确定,以在双向信号路径的端部传播到相位响应接收机。 每个接收机可以具有用作波束组合器的耦合器和用于插入相反信号的分束器。 在每个接收端,耦合器向一个或多个检测器提供信号,从相位相关的独立变量值被采取,处理并映射到相位角。 对于每个相对的信号对导出相对相位角对时间,并且在时间差处相关,即,扰乱位置从该差异被解析的传播时间差。 与各种光纤布置讨论偏振敏感和极化不敏感的示例。
    • 3. 发明申请
    • Distributed fiber sensor with detection and signal processing using polarization state management
    • 分布式光纤传感器,具有使用偏振状态管理的检测和信号处理
    • US20050276611A1
    • 2005-12-15
    • US10911326
    • 2004-08-04
    • Jayantilal PatelZhizhong ZhuangYuri Zadorozhny
    • Jayantilal PatelZhizhong ZhuangYuri Zadorozhny
    • H04B10/00H04B10/02H04B10/08
    • G01M11/39H04B10/00
    • Polarization effects are managed to provide differential timing information for localizing disturbances affecting two or more counter-propagating light signals on one or more optical waveguides passing through a detection zone. Activity can be localized to a point for a security perimeter. Events causing optical disturbance can be mapped to points along a straight line, a perimeter or arbitrary pattern or an array. Events cause local changes in optical properties in the optical waveguide, in particular an optical fiber. Short term local changes are distinguishable from phase changes of light travel in the waveguide, by managing the polarization state of input and output beams, combining orthogonal polarization components and other aspects. The changes in the states of polarization of the counter-propagating light signals are determined and the temporal spacing of corresponding changes in polarization state are resolved to pinpoint the location of the event along the optical fiber.
    • 管理极化效应以提供差分定时信息,用于定位影响通过检测区域的一个或多个光波导上的两个或多个反向传播光信号的干扰。 活动可以本地化到安全边界的一个点。 导致光学干扰的事件可以映射到沿直线,周边或任意图案或阵列的点。 事件导致光波导中光学特性的局部变化,特别是光纤。 通过管理输入和输出光束的偏振状态,组合正交偏振分量和其他方面,短期局部变化可以与波导中光行进的相位变化区别开来。 确定反向传播光信号的极化状态的变化,并且解决极化状态中相应变化的时间间隔,以确定事件沿光纤的位置。
    • 9. 发明授权
    • Temperature compensation of a wedge-shaped liquid-crystal cell
    • 楔形液晶盒的温度补偿
    • US6075512A
    • 2000-06-13
    • US891093
    • 1997-07-10
    • Jayantilal PatelJung-Chih Chiao
    • Jayantilal PatelJung-Chih Chiao
    • G02F1/133G02F1/1333G02F1/31G09G3/36
    • G02F1/133382G02F1/133371G02F1/31
    • A method and apparatus for compensating for temporally varying effects, such as temperature, in a liquid-crystal cell, particularly a wedge-shaped liquid-crystal cell. The temperature of the liquid crystal is measured, either directly with a thermocouple or the like, or by optical means which depend upon the temperature of the liquid crystal. For example, an intensity detector monitors the polarization rotation of a probe beam of light having a substantially different wavelength than that of the beam modulated by the liquid crystal, and a feedback circuit keeps the intensity at a predetermined value corresponding to the optimum path length in the liquid crystal of the modulated beam. The feedback signal from the temperature measurement is used to effectively change the gap filled with liquid crystal. For a wedge-shaped cell, the gap size is changed by moving the cell in the wedge direction. Other cell structures are available in which the gap size is physically changed by mechanical movement of the cell walls.
    • 用于补偿液晶单元,特别是楔形液晶单元中的时间上变化的影响(如温度)的方法和装置。 液晶的温度直接用热电偶等测量,或通过取决于液晶温度的光学装置进行测量。 例如,强度检测器监测具有与由液晶调制的光束的波长基本不同的波长的探测光束的偏振旋转,并且反馈电路将强度保持在对应于最佳路径长度的预定值 调制光束的液晶。 来自温度测量的反馈信号用于有效地改变填充液晶的间隙。 对于楔形电池,通过沿着楔形方向移动电池来改变间隙尺寸。 其他单元结构是可用的,其中间隙尺寸通过单元壁的机械运动物理地改变。