公开(公告)号：US06630658B1

公开(公告)日：2003-10-07

申请号：US09623048

申请日：2000-11-20

Applicant: Klaus Bohnert ,  Hubert Brandle

Inventor： Klaus Bohnert ,  Hubert Brandle

IPC: G01J104

CPC classification number: G02B6/022 ,  G01D5/35316 ,  G01D5/3538 ,  G01L11/025 ,  G02B6/02085 ,  G02B6/105

Abstract: The invention relates to a frequency-coded fiber laser pressure sensor (1) which is especially suitable for measuring isotropic pressures in oil wells. The sensor principle provided for in the invention is based on the fact that in a fiber laser (2) doped with Er3+ a monomode or bimodal sensor fiber (5, 5a, 5b) is positioned whose pressure-related birefraction results in a frequency shift and beat frequencies between the orthogonal linear polarisation modes x, y or the spatial modes LP01 and LP11straight line. The beat frequencies are easily measured using a frequency counter (19). Temperature-related variations in birefraction are compensated in a differential arrangement of two sensor fiber segments (5a, 5b). Fiber-integrated Bragg gratings (4a, 4b) with low bandwidths (0.2 nm) are especially suitable as laser end reflectors. The pressure sensor (1) is characterized by a large measurement range (100 Mpa) and a high triggering capacity , (kPa), is readily multiplexed and can be housed in a very compact, light-weight and robust pressure-resistant housing (25).

Abstract translation: 本发明涉及一种频率编码的光纤激光压力传感器（1），其特别适合于测量油井中的各向同性压力。 在本发明中提供的传感器原理基于以下事实：在掺杂有Er 3+的单模或双峰传感器光纤（5,5a，5b）的光纤激光器（2）中定位其压力相关双折射结果 正交线性偏振模x，y或空间模式LP01和LP11 <直线之间的频移和拍频。 使用频率计数器（19）容易地测量拍频。 温度相关的双折射变化在两个传感器光纤段（5a，5b）的差分布置中被补偿。 具有低带宽（0.2nm）的光纤集成布拉格光栅（4a，4b）特别适用于激光端反射器。 压力传感器（1）的特征在于测量范围大（100Mpa）和高触发能力（kPa）容易复用，并且可以容纳在非常紧凑，重量轻且耐用的耐压外壳（25 ）。

公开(公告)号：US06566648B1

公开(公告)日：2003-05-20

申请号：US09535661

申请日：2000-03-24

Applicant: Mark E. Froggatt

Inventor： Mark E. Froggatt

IPC: G01J104

CPC classification number: G01B11/165 ,  G01L1/246 ,  G01M11/088

Abstract: An apparatus and method for measuring strain of gratings written into an optical fiber. Optical radiation is transmitted over one or more contiguous predetermined wavelength ranges into a reference optical fiber network and an optical fiber network under test to produce a plurality of reference interference fringes and measurement interference fringes, respectively. The reference and measurement fringes are detected, and the reference fringes trigger the sampling of the measurement fringes. This results in the measurement fringes being sampled at 2&pgr; increments of the reference fringes. Each sampled measurement fringe of each wavelength sweep is transformed into a spatial domain waveform. The spatial domain waveforms are summed to form a summation spatial domain waveform that is used to determine location of each grating with respect to a reference reflector. A portion of each spatial domain waveform that corresponds to a particular grating is determined and transformed into a corresponding frequency spectrum representation. The strain on the grating at each wavelength of optical radiation is determined by determining the difference between the current wavelength and an earlier, zero-strain wavelength measurement.

Abstract translation: 用于测量写入光纤的光栅的应变的装置和方法。 光辐射通过一个或多个连续的预定波长范围传输到参考光纤网络和被测光纤网络，以分别产生多个参考干涉条纹和测量干涉条纹。 检测参考和测量条纹，参考条纹触发测量条纹的采样。 这导致测量条纹以参考条纹的2pi增量被采样。 每个波长扫描的每个采样的测量条纹被转换成空间域波形。 将空间域波形相加以形成用于确定每个光栅相对于参考反射器的位置的求和空间域波形。 确定对应于特定光栅的每个空间域波形的一部分并将其变换成相应的频谱表示。 通过确定当前波长和较早的零应变波长测量之间的差异来确定光辐射的每个波长处的光栅上的应变。

公开(公告)号：US06501067B2

公开(公告)日：2002-12-31

申请号：US09726060

申请日：2000-11-29

Applicant: Richard T. Jones ,  Allen R. Davis ,  John M. Faustino

Inventor： Richard T. Jones ,  Allen R. Davis ,  John M. Faustino

IPC: G01J104

CPC classification number: G01F1/666 ,  G01D5/35316 ,  G01D5/35374

Abstract: An apparatus for non-intrusively sensing fluid flow within a pipe is provided. The apparatus includes an array of sensors that include a plurality of optical fiber coils. The array of sensors senses the fluid flow inside the pipe. At least one optical reflective device is disposed between adjacent optical fiber coils. An isolation pad is disposed between each optical reflective device and the pipe.

Abstract translation: 提供了一种用于非侵入式地感测管内流体流动的装置。 该装置包括包括多个光纤线圈的传感器阵列。 传感器阵列检测管道内的流体流动。 至少一个光学反射装置设置在相邻的光纤线圈之间。 隔离垫设置在每个光反射装置和管之间。

公开(公告)号：US06472655B1

公开(公告)日：2002-10-29

申请号：US09396325

申请日：1999-09-15

Applicant: Hiroshi Sakuyama

Inventor： Hiroshi Sakuyama

IPC: G01J104

CPC classification number: H04B10/291 ,  H04B10/07 ,  H04B10/071

Abstract: A remote amplifier of the present invention includes an optical splitter and an optical combiner respectively connected to an input and an output thereof. One end of the split output of the splitter is used as an input port while one end of the combiner is used as an output port. When a fault occurs at a certain point on an optical transmission path, an ODOR (Optical Time Domain Reflect meter) is connected to either one of the input port and output port for evaluating the faulty point.

Abstract translation: 本发明的远程放大器包括分别连接到其输入和输出的光分路器和光组合器。 分离器的分离输出的一端用作输入端口，而组合器的一端用作输出端口。 当在光传输路径上的某一点发生故障时，将ODOR（光时域反射计）连接到输入端口和输出端口中的任何一个，以评估故障点。

公开(公告)号：US06437861B1

公开(公告)日：2002-08-20

申请号：US09504883

申请日：2000-02-16

Applicant: John J. Kuta

Inventor： John J. Kuta

IPC: G01J104

CPC classification number: G01J1/02 ,  G01J1/0271 ,  G01J2001/0481

Abstract: A light integrating interface having a housing made substantially of pressed polytetrafluoroethylene powder. The interface has a non-spherical integrating cavity with a reflective inner surface, as well as a light energy input port and a light energy output port operatively coupled to the integrating cavity.

Abstract translation: 一种光集成接口，具有基本上由压制的聚四氟乙烯粉末制成的壳体。 界面具有具有反射内表面的非球形积分腔，以及可操作地耦合到积分腔的光能输入端口和光能输出端口。

公开(公告)号：US06429421B1

公开(公告)日：2002-08-06

申请号：US09489768

申请日：2000-01-21

Applicant: Scott A. Meller ,  Kent A. Murphy ,  Mark E. Jones

Inventor： Scott A. Meller ,  Kent A. Murphy ,  Mark E. Jones

IPC: G01J104

CPC classification number: G02B6/3628 ,  G01L1/245 ,  G02B6/14 ,  G02B6/266

Abstract: A flexible microbend device for attachment to an optical fiber is provided. The device comprises an upper bending element grid having at least one flexible element and a lower bending element grid having at least one flexible element. The upper bending element grid alternately engages the lower bending element grid. The flexible microbend device is attached to an optical fiber to form a sensor. The sensor may be either embedded in a host material or attached to a structure to detect various stresses or strains.

Abstract translation: 提供了用于附接到光纤的柔性微弯装置。 该装置包括具有至少一个柔性元件的上部弯曲元件格栅和具有至少一个柔性元件的下部弯曲元件网格。 上部弯曲元件格栅交替地接合下部弯曲元件格栅。 柔性微弯装置连接到光纤以形成传感器。 传感器可以嵌入主体材料中或附着于结构以检测各种应力或应变。

公开(公告)号：US06424413B1

公开(公告)日：2002-07-23

申请号：US09097312

申请日：1998-06-12

Applicant: William L. Weber ,  Harold R. Van Aken ,  Perry A. Palumbo ,  Joseph Corrado

Inventor： William L. Weber ,  Harold R. Van Aken ,  Perry A. Palumbo ,  Joseph Corrado

IPC: G01J104

CPC classification number: G01N21/474 ,  G01J3/0251 ,  G01J3/0254 ,  G01J3/0294 ,  G01N21/251 ,  G01N2021/555 ,  G01N2021/556

Abstract: An integrating sphere, and an integrating sphere-based reflectance colorimeter/spectrophotometer for the measurement of color and appearance, having multiple receivers capable of concurrently receiving optical radiation scattered/reflected from a diffusely illuminated sample surface, with the capability of multiple measurement modes (e.g., multiple specular component excluded (SCE), SCE and specular component included (SCI), multiple SCI), multiple areas-of-view for a given measurement mode, multiple viewing angles per measurement mode, and combinations thereof. An embodiment of the invention includes two SCI receivers and two SCE receivers, each disposed at an equal viewing angle relative to the sample surface. For each viewing mode, two sample areas-of-view are provided. The SCE receivers are opposite each other, such that the specular component of each SCE receiver is excluded by the port of the other SCE receiver. The receivers provide the collected light reflected from the sample to a detector which preferably is provided by multiple spectrometers or a single spectrometer having multichannel capability to preferably sense the light from each receiver in parallel.

Abstract translation: 一种积分球和一种用于测量颜色和外观的基于积分球的反射比色计/分光光度计，具有能够同时接收从漫射照射的样品表面散射/反射的光辐射的多个接收器，具有多种测量模式的能力（例如， （SCE），SCE和包括镜面成分（SCI），多个SCI），给定测量模式的多个视场，每个测量模式的多个视角，以及它们的组合。 本发明的实施例包括两个SCI接收器和两个SCE接收器，每个SCE接收器和相对于样品表面以相等的视角设置。 对于每个观看模式，提供了两个采样区域。 SCE接收机彼此相对，使得每个SCE接收机的镜面分量被另一SCE接收机的端口排除。 接收器将从样品反射的收集的光提供到优选由多个光谱仪提供的检测器或具有多通道能力的单个光谱仪，以优选地平行地感测来自每个接收器的光。

公开(公告)号：US06414303B1

公开(公告)日：2002-07-02

申请号：US09487155

申请日：2000-01-19

Applicant: Alan D. Kersey

Inventor： Alan D. Kersey

IPC: G01J104

CPC classification number: G01D5/35316 ,  G01J9/00 ,  G02B6/02076

Abstract: A fiber Bragg grating sensor system has a pi-shifted fiber Bragg grating sensor and a dual resolution mode wavelength detection system. The pi-shifted fiber Bragg grating sensor responds to a parameter, and further responds to an optical source signal, for providing a pi-shifted fiber Bragg grating sensor signal containing information about the parameter. The dual resolution mode wavelength detection system responds to the pi-shifted fiber Bragg grating sensor signal, for providing a dual resolution mode wavelength detection signal containing information about the parameter. The dual resolution mode wavelength detection system includes a low resolution wavelength detection system for detecting a resonance peak in the pi-shifted fiber Bragg grating sensor signal; and includes a high resolution wavelength detection system for detecting a resonance dip in the resonance peak of the pi-shifted fiber Bragg grating sensor signal. The high resolution wavelength detection system includes a scanning laser for detecting the resonance dip in the resonance peak. The dual resolution mode wavelength detection system may also include a high resolution wavelength detection system for detecting a high resolution spectral feature in a resonance peak of the pi-shifted fiber Bragg grating sensor signal.

Abstract translation: 光纤布拉格光栅传感器系统具有一个pi位移光纤布拉格光栅传感器和一个双分辨率模式波长检测系统。 pi位移光纤布拉格光栅传感器响应参数，并进一步响应光源信号，以提供包含有关参数的信息的pi位移光纤布拉格光栅传感器信号。 双分辨率模式波长检测系统响应于pi位移的光纤布拉格光栅传感器信号，用于提供包含有关参数的信息的双分辨率模式波长检测信号。 双分辨率模式波长检测系统包括：低分辨率波长检测系统，用于检测pi位移光纤布拉格光栅传感器信号中的谐振峰值; 并且包括高分辨率波长检测系统，用于检测pi位移光纤布拉格光栅传感器信号的谐振峰值中的谐振下降。 高分辨率波长检测系统包括用于检测谐振峰值中的谐振下降的扫描激光器。 双分辨率模式波长检测系统还可以包括高分辨率波长检测系统，用于检测pi位移光纤布拉格光栅传感器信号的谐振峰值中的高分辨率光谱特征。

公开(公告)号：US06831266B2

公开(公告)日：2004-12-14

申请号：US10097557

申请日：2002-03-13

Applicant: Alexander Paritsky ,  Alexander Kots

Inventor： Alexander Paritsky ,  Alexander Kots

IPC: G01J104

CPC classification number: H04R23/008

Abstract: An optical transducer includes a base member, a light source carried on a face of the base member, a light detector carried on the face of the base member, a displaceable member overlying and spaced from the light source and light detector and effective to reflect light from the light source to the light detector, and light shielding means effective to shield the light detector from exposure to the light source except for the light reflected by the displaceable member from the light source to the light detector. The light detector is configured to substantially surround the light source such as to receive light emitted in substantially all directions from the light source for reflection to the light detector by the displaceable member.

Abstract translation: 一种光学换能器，包括：基座部件，承载在基体部件表面上的光源，承载在基体部件表面上的光检测器，与光源和光检测器重叠并间隔开的可移位部件， 从光源到光检测器，以及遮光装置，除了由可移动部件从光源到光检测器反射的光之外，有效地屏蔽光检测器不被光源照射。 光检测器被配置为基本上围绕光源，以便接收从光源的基本上所有方向发射的光，以便通过可移位部件反射到光检测器。

公开(公告)号：US06822217B1

公开(公告)日：2004-11-23

申请号：US09926016

申请日：2002-01-24

Applicant: Ian J. Murgatroyd ,  Catherine A. Sugden

Inventor： Ian J. Murgatroyd ,  Catherine A. Sugden

IPC: G01J104

CPC classification number: G01J3/18 ,  G02B6/022 ,  G02B6/29319 ,  G02B6/29322

Abstract: An optical spectrum analyzer (10), receiving a multi-channel optical signal (12). The optical signal (12) is passed through an optical isolator (14) and a fiber coupler (16) to a tunable optical filter. The tunable optical filter comprises one or more fiber Bragg gratings (18) inscribed in a length of optical fiber. The optical fiber is mounted on a means operable to apply a variable strain to the fiber, to they tune the peak wavelength of the Bragg grating (18) over a desired wavelength range, the tunable optical filter thereby reflecting each channel of the input signal (12) in turn. The detector (20) therefore detects a signal only if the input signal (12) contains wavelengths corresponding to the reflection wavelength of a grating (18).

Abstract translation: 一种光谱分析仪（10），其接收多通道光信号（12）。 光信号（12）通过光隔离器（14）和光纤耦合器（16）传送到可调光滤波器。 可调谐滤光器包括内接在一定长度的光纤中的一个或多个光纤布拉格光栅（18）。 光纤安装在可操作以向光纤施加可变应变的装置上，以便它们在所需波长范围内调谐布拉格光栅（18）的峰值波长，从而可调光滤波器反映输入信号的每个通道（ 12）。 因此，只有当输入信号（12）包含与光栅（18）的反射波长相对应的波长时，检测器（20）才能检测信号。