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    • 41. 发明授权
    • Method and apparatus for increasing the unambiguous sensing range in an
interferometric fiber gyroscope
    • 用于增加干涉光纤陀螺仪中明确感测范围的方法和装置
    • US4874244A
    • 1989-10-17
    • US68181
    • 1987-06-30
    • Alan D. Kersey
    • Alan D. Kersey
    • G01C19/72
    • G01C19/721
    • A method and apparatus, utilizing multiple light signals, for extending the dynamic range of an interferometric system such as an optical fiber gyroscope based on dual wavelength measurement of the Sagnac phase shift in order to determine the fringe number of the interferometric fiber system, thereby increasing the unambiguous range of the device. An analogue measure of the fringe number is provided, thus eliminating the need for digital fringe counting or tracking. An apparatus is described for measuring absolutely, within certain upper bounds determined by the exact wavelengths used, the rotation rate when the system is powered up in a rotating frame.
    • 一种利用多个光信号的方法和装置,用于扩展基于Sagnac相移的双波长测量的诸如光纤陀螺仪的干涉系统的动态范围,以便确定干涉光纤系统的边缘数,从而增加 设备的明确范围。 提供了条纹数字的模拟测量,从而消除了对数字条纹计数或跟踪的需要。 描述了一种用于在由所使用的精确波长确定的某些上限内绝对测量当系统在旋转框架中通电时的旋转速率的装置。
    • 43. 发明授权
    • Apparatus having an array of piezoelectric film sensors for measuring parameters of a process flow within a pipe
    • 具有用于测量管道内的工艺流程的参数的压电膜传感器阵列的装置
    • US07474966B2
    • 2009-01-06
    • US11521627
    • 2006-09-14
    • Mark R. FernaldMichael A. DavisAlan D. KerseyDouglas LooseTimothy J. Bailey
    • Mark R. FernaldMichael A. DavisAlan D. KerseyDouglas LooseTimothy J. Bailey
    • G06F19/00
    • G01F1/712G01F1/74
    • A apparatus 10,110,170 is provided that measures the speed of sound and/or vortical disturbances propagating in a single phase fluid flow and/or multiphase mixture to determine parameters, such as mixture quality, particle size, vapor/mass ratio, liquid/vapor ratio, mass flow rate, enthalpy and volumetric flow rate of the flow in a pipe, by measuring acoustic and/or dynamic pressures. The apparatus includes a spatial array of unsteady pressure sensors 15-18 placed at predetermined axial locations x1-xN disposed axially along the pipe 14. The pressure sensors 15-18 provide acoustic pressure signals P1(t)-PN(t) to a signal processing unit 30 which determines the speed of sound amix propagating through of the process flow 12 flowing in the pipe 14. The pressure sensors are piezoelectric film sensors that are mounted or clamped onto the outer surface of the pipe at the respective axial location.
    • 提供了一种装置10,110,170,其测量在单相流体流和/或多相混合物中传播的声速和/或涡流干扰的速度,以确定参数,例如混合质量,粒度,蒸气/质量比,液体/蒸气比, 质量流量,管道中流量的焓和体积流量,通过测量声学和/或动态压力。 该装置包括放置在沿管14轴向设置的预定轴向位置x1-xN处的不稳定压力传感器15-18的空间阵列。压力传感器15-18向信号提供声压信号P1(t)-PN(t) 处理单元30,其确定在管14中流动的工艺流程12传播的声音amix的速度。压力传感器是压电膜传感器,其在相应的轴向位置处安装或夹紧在管的外表面上。
    • 48. 发明授权
    • Strain-isolated Bragg grating temperature sensor
    • 应变隔离布拉格光栅温度传感器
    • US06865194B1
    • 2005-03-08
    • US09455866
    • 1999-12-06
    • Christopher J. WrightMark R. FernaldTimothy J. BaileyJames M. SullivanJames R. DunphyMichael A. DavisAlan D. KerseyMartin A. PutnamRobert N. BrucatoPaul E. Sanders
    • Christopher J. WrightMark R. FernaldTimothy J. BaileyJames M. SullivanJames R. DunphyMichael A. DavisAlan D. KerseyMartin A. PutnamRobert N. BrucatoPaul E. Sanders
    • G01K11/32H01S3/30G01N21/00
    • G01K11/32
    • A strain-isolated bragg grating temperature sensor includes an optical sensing element 20,600 which includes an optical fiber 10 having at least one Bragg grating 12 disposed therein which is encased within and fused to at least a portion of a glass capillary tube 20 and/or a large diameter waveguide grating 600 having a core and a wide cladding and having the grating 12 disposed therein, which senses temperature changes but is substantially not sensitive to strains on the element caused by the fiber or other effects. Light 14 is incident on the grating 12 and light 16 is reflected at a reflection wavelength λ1. The shape of the sensing element 20,600 may be other geometries and/or more than one concentric tube may be used or more than one grating or pair of gratings may be used or more than one fiber or optical core may be used. At least a portion of the element 20,600 may be doped between a pair of gratings 150,152, disposed therein to form a temperature tunable laser or the grating 12 or gratings 150,152 may be constructed as a temperature tunable DFB laser disposed in the element. Also, the element may have an inner or outer tapered regions 22,27, respectively, to provide strain relief and/or added pull strength for the fiber 10. Further, the fiber 10 and the tube 20 may be made of different coefficients of thermal expansion for increased sensitivity.
    • 应变隔离布拉格光栅温度传感器包括光学传感元件20,600,光学传感元件20,600包括光纤10,该光纤10具有布置在其中的至少一个布拉格光栅12,该布拉格光栅12被封装在玻璃毛细管20的至少一部分内并且熔合到玻璃毛细管20和/ 大直径波导光栅600具有芯和宽包层并且其中布置有光栅12,其感测温度变化,但对由纤维或其它效应引起的元件上的应变基本上不敏感。 光14入射在光栅12上,光16以反射波长λ1反射。 感测元件20,600的形状可以是其他几何形状,和/或可以使用多于一个的同心管,或者可以使用多于一个的光栅或一对光栅,或者可以使用多于一个的光纤或光纤。 元件20,600的至少一部分可以被掺杂在放置在其中的一对光栅150,152之间以形成温度可调激光器,或者光栅12或光栅150,152可以被构造为设置在元件中的温度可调谐DFB激光器。 此外,元件可以分别具有内部或外部锥形区域22,27,以为纤维10提供应变消除和/或增加的拉伸强度。此外,纤维10和管子20可以由不同的热系数 扩大灵敏度提高。
    • 50. 发明授权
    • Compression-tuned grating-based optical add/drop multiplexer
    • 压缩调谐光栅光分插复用器
    • US06633695B2
    • 2003-10-14
    • US09800918
    • 2001-03-06
    • Timothy J. BaileyMark R. FernaldAlan D. KerseyTrevor W. MacDougallMartin A. PutnamPaul E. Sanders
    • Timothy J. BaileyMark R. FernaldAlan D. KerseyTrevor W. MacDougallMartin A. PutnamPaul E. Sanders
    • G02B628
    • G02B6/2932G02B6/022G02B6/29322G02B6/29383G02B6/29395G02B6/29398H04J14/021
    • A compression-tuned fiber Bragg grating based reconfigurable wavelength add/drop module has a compression force assembly and an all-glass Bragg grating compression unit having gratings spaced along an axis of compression. The compression force assembly responds to a control electronics signal containing information about a selected wavelength of a channel to be added to or dropped from an optical traffic signal, for providing a compression force applied along the axis of compression. The compression unit responds to the optical traffic signal and the compression force, for providing an all-glass Bragg grating compression unit optical signal having the selected wavelength of the channel to be added to or dropped from the optical traffic signal. The compression unit optical signal may include either the traffic with an added reflected channel(s), or a dropped reflected channel(s). The compression unit is a “dogbone” structure having either a glass tube with an optical fiber fused therein, or a single large diameter waveguide having a core. The core of the optical fiber or waveguide has the gratings spaced therein. The axis of compression is parallel with the longitudinal axis of the dogbone structure.
    • 基于压缩调谐光纤布拉格光栅的可重构波长加/减模块具有压缩组件和全玻璃布拉格光栅压缩单元,其具有沿压缩轴间隔开的光栅。 压缩力组件响应于控制电子信号,该控制电子信号包含关于要添加到或从光学交通信号中掉落的信道的选定波长的信息,以提供沿着压缩轴施加的压缩力。 压缩单元响应于光学交通信号和压缩力,用于提供具有要被添加到或从光学交通信号中掉落的信道的所选波长的全玻璃布拉格光栅压缩单元光信号。 压缩单元光信号可以包括具有附加反射信道的业务或者丢弃的反射信道。 压缩单元是具有熔合在其中的光纤的玻璃管或具有芯的单个大直径波导的“狗骨”结构。 光纤或波导的核心具有间隔开的光栅。 压缩轴线与狗骨架结构的纵向轴线平行