公开(公告)号：US20160011107A1

公开(公告)日：2016-01-14

申请号：US14865408

申请日：2015-09-25

Applicant: PD-LD, Inc.

Inventor： Vladimir Sinisa Ban ,  Boris Leonidovich Volodin ,  Grzegorz Drozdz ,  Uri Abrams

IPC: G01N21/55

CPC classification number: G01N21/55 ,  G01D5/268 ,  G01D5/35367 ,  G01M5/0008 ,  G01M5/0033 ,  G01M11/083 ,  G01M11/085 ,  G01N17/04 ,  G01N2201/0886

Abstract: A sensor for detecting material degradation may include an optical fiber and a housing through which the optical fiber extends. An end cap may be affixed to an end of the housing. Light provided through the optical fiber may be reflected off of the end cap back through the optical fiber. The end cap may be made of a material of interest, and may be situated in an environment wherein the material of interest is present. A light source may provide input light through the optical fiber. A portion of the input light may be reflected off of the end cap. A light receptor may receive the reflected light via the optical fiber. A processing unit may be adapted to compare a measured intensity of the reflected light to a threshold, and to initiate an alarm condition if the measured intensity is below the threshold.

Abstract translation: 用于检测材料劣化的传感器可以包括光纤和光纤延伸穿过的外壳。 端盖可以固定到壳体的端部。 通过光纤提供的光可以通过光纤从端帽反射离开。 端盖可以由感兴趣的材料制成，并且可以位于存在感兴趣的材料的环境中。 光源可以通过光纤提供输入光。 输入光的一部分可以从端盖反射出来。 光接收器可以经由光纤接收反射光。 处理单元可以适于将测得的反射光强度与阈值进行比较，并且如果测量的强度低于阈值则启动报警条件。

公开(公告)号：US20150177411A1

公开(公告)日：2015-06-25

申请号：US14138972

申请日：2013-12-23

Applicant: Brooks A Childers ,  Christopher J Fazio ,  Roger Glen Duncan

Inventor： Brooks A Childers ,  Christopher J Fazio ,  Roger Glen Duncan

IPC: G01V8/16

CPC classification number: G01V8/16 ,  E21B47/06 ,  E21B47/09 ,  E21B47/123 ,  G01D5/35316 ,  G01J3/10 ,  G01K11/3206 ,  G01K2011/322 ,  G01L1/246 ,  G01L11/025 ,  G01N2201/088 ,  G01N2201/0886 ,  G01V8/00 ,  G01V8/10 ,  G01V8/12 ,  G02B6/02 ,  G02B6/02057 ,  G02B6/02076 ,  G02B6/02347

Abstract: A method for estimating an environmental parameter includes transmitting a first interrogation signal into an optical fiber, receiving a reflected return signal including light reflected from one or more of the plurality of FBG's in the fiber and receiving at a processor data describing the reflected return signal. The received data is comparted to expected data to determine a shift in wavelength of light reflected for one or more of the plurality of FBGs and a change in a length of a dead zone of the optical fiber based on the comparison is also determined. From this, estimates of locations two or more of the plurality of FBG's are formed.

Abstract translation: 一种用于估计环境参数的方法包括将第一询问信号发送到光纤中，接收包括从光纤中的多个FBG中的一个或多个反射的光的反射的返回信号，并且以描述反射的返回信号的处理器数据进行接收。 接收到的数据被分配到期望数据以确定针对多个FBG中的一个或多个的反射的光的偏移，并且还确定基于该比较的光纤的死区长度的变化。 由此，形成多个FBG中的两个以上的位置的估计。

公开(公告)号：US20130170786A1

公开(公告)日：2013-07-04

申请号：US13683314

申请日：2012-11-21

Applicant: Chunghwa Telecom Co., Ltd.

Inventor： Chih-Yih WANG ,  Zi-Wen WANG ,  Chia-Hsien WU ,  Fwu-Yuan TSAI

IPC: G02B6/00

CPC classification number: G02B6/00 ,  G01M3/047 ,  G01N21/552 ,  G01N2021/1793 ,  G01N2201/0886

Abstract: A remote water sensing system and method with optical fiber, comprises a water sensor which is an optical element designed in accordance with the principle of optical path return loss and provided with reusable features to measure the state of having water or not. A monitoring equipment is provided which is an Optical Time Domain Reflectometer (OTDR), an Optical Frequency Modulated Continuous Wave (OFMCW), or a light source power meter, and used to emit monitoring light signals and accept optical signals returned from the water sensor. A signal processing control unit analyzes the optical signal returned from the water sensor to determine whether the monitoring position is touching the water or not. The method can be used in other fields, such as optical closure watering monitoring, telecommunications facilities flooding alarm, and monitoring and alarm for a low-lying area or river water level of a bridge.

Abstract translation: 具有光纤的远程水感测系统和方法包括水传感器，其是根据光路返回损耗原理设计的光学元件，并且具有用于测量具有水的状态的可重复使用特征。 提供了一种监视设备，它是光时域反射计（OTDR），光频调制连续波（OFMCW）或光源功率计，用于发射监测光信号并接收从水传感器返回的光信号。 信号处理控制单元分析从水传感器返回的光信号，以确定监视位置是否接触到水。 该方法可用于其他领域，如光学封闭浇水监测，电信设备洪水报警，以及桥梁低洼地区或河流水位的监测和报警。

公开(公告)号：US20070286547A1

公开(公告)日：2007-12-13

申请号：US11842906

申请日：2007-08-21

Applicant: Robert Lieberman ,  Claudio Egalon

Inventor： Robert Lieberman ,  Claudio Egalon

IPC: G02B6/00

CPC classification number: G02B6/02 ,  G01D5/35345 ,  G01N21/7703 ,  G01N2021/7716 ,  G01N2021/7773 ,  G01N2021/7783 ,  G01N2021/7786 ,  G01N2201/0886 ,  Y10S385/901 ,  Y10S436/805

Abstract: Distributed fiber optic chemical and physical sensors provide a relatively highly uniform response over the length of the fiber by, for example, varying such properties as the core/cladding index of refraction ratio to compensate for the non-linearity in sensitivity due for example to the loss of higher order modes in multi-mode fibers. The variation of the ratio changes the absorption coefficient of the fiber and can be used to compensate for any non-linearity in response. Other techniques for compensation also are disclosed. In particular, the invention enables compensation for the duration of the spatial transient by varying a parameter relating to the fiber.

Abstract translation: 分布式光纤化学和物理传感器通过例如改变诸如芯/包层折射率折射率之类的特性来补偿光纤的长度上的非线性，从而在光纤的长度上提供相对高度均匀的响应，以补偿由于例如 多模光纤中高阶模式的损失。 该比率的变化改变了光纤的吸收系数，可用于补偿任何响应的非线性。 还公开了其他补偿技术。 特别地，本发明可以通过改变与光纤相关的参数来补偿空间瞬态的持续时间。

公开(公告)号：US20060147149A1

公开(公告)日：2006-07-06

申请号：US11364237

申请日：2006-02-28

Applicant: Robert Lieberman ,  Claudio Egalon

Inventor： Robert Lieberman ,  Claudio Egalon

IPC: G02B6/00

CPC classification number: G02B6/02 ,  G01D5/35345 ,  G01N21/7703 ,  G01N2021/7716 ,  G01N2021/7773 ,  G01N2021/7783 ,  G01N2021/7786 ,  G01N2201/0886 ,  Y10S385/901 ,  Y10S436/805

Abstract: Distributed fiber optic chemical and physical sensors provide a relatively highly uniform response over the length of the fiber by, for example, varying such properties as the core/cladding index of refraction ratio to compensate for the non-linearity in sensitivity due for example to the loss of higher order modes in multi-mode fibers. The variation of the ratio changes the absorption coefficient of the fiber and can be used to compensate for any non-linearity in response. Other techniques for compensation also are disclosed.

Abstract translation: 分布式光纤化学和物理传感器通过例如改变诸如芯/包层折射率折射率之类的特性来补偿纤维长度上的相对高度均匀的响应，以补偿由于例如至 多模光纤中高阶模式的损失。 该比率的变化改变了光纤的吸收系数，可用于补偿任何响应的非线性。 还公开了其他补偿技术。

公开(公告)号：US20040150827A1

公开(公告)日：2004-08-05

申请号：US10357766

申请日：2003-02-04

Applicant: General Electric Company

Inventor： Radislav A. Potyrailo ,  Joseph R. Wetzel

IPC: G01N021/00

CPC classification number: G01N21/643 ,  G01N21/7703 ,  G01N21/8422 ,  G01N21/952 ,  G01N2021/646 ,  G01N2021/7716 ,  G01N2021/773 ,  G01N2021/7786 ,  G01N2201/0886

Abstract: Methods and devices are disclosed for measuring barrier properties of a barrier coating or coating arrays where each barrier coating has a small cross section. To reduce the edge effects in the measurements of barrier properties, measurements are made using a substrate which can be flat, cylindrical or spherical structure coated with a chemically sensitive layer, a solvent resistant layer and an array of barrier coatings. The coated substrate which can be flat, cylindrical or spherical is exposed to a material of interest that has the ability to produce an analyzable variation in the chemically sensitive layer, thereby providing the ability to detect an impact of the material of interest on the barrier coatings. In one variation, an optical radiation interacts with the substrate structure, a resulting initial optical radiation associated with the initial optical radiation and each barrier coating is detected, and any impacts on the coatings by the material of interest are correlated to a value of a barrier property for each of the array of barrier coatings.

Abstract translation: 公开了用于测量阻挡涂层或涂层阵列的阻挡性能的方法和装置，其中每个阻挡涂层具有小的横截面。 为了减少阻挡性能的测量中的边缘效应，使用可以具有化学敏感层，耐溶剂层和阻挡涂层阵列的平坦，圆柱形或球形结构的衬底进行测量。 可以是平坦的，圆柱形的或球形的涂覆的基底暴露于感兴趣的材料，其具有在化学敏感层中产生可分析的变化的能力，从而提供检测感兴趣的材料对阻挡涂层的影响的能力 。 在一个变型中，光辐射与衬底结构相互作用，检测到与初始光辐射和每个阻挡涂层相关联的所得到的初始光辐射，并且感兴趣材料对涂层的任何影响与屏障的值相关 每个屏障涂层阵列的性能。

公开(公告)号：US20020018629A1

公开(公告)日：2002-02-14

申请号：US09730158

申请日：2000-12-05

Inventor： Robert A. Lieberman ,  Claudio O. Egalon

IPC: G02B006/16 ,  G02B006/02

CPC classification number: G02B6/02 ,  G01D5/35345 ,  G01N21/7703 ,  G01N2021/7716 ,  G01N2021/7773 ,  G01N2021/7783 ,  G01N2021/7786 ,  G01N2201/0886 ,  Y10S385/901 ,  Y10S436/805

Abstract: Distributed fiber optic chemical and physical sensors provide a relatively highly uniform response over the length of the fiber by, for example, varying such properties as the core/cladding index of refraction ratio to compensate for the non-linearity in sensitivity due to the loss of higher order modes in multi-mode fibers. The variation of the ratio changes the absorption coefficient of the fiber and can be used to compensate for any non-linearity in response. Other techniques for compensation also are disclosed.

Abstract translation: 分布式光纤化学和物理传感器通过例如改变诸如芯/包层折射率折射率之类的特性来补偿纤维的长度上的相对高度均匀的响应，以补偿灵敏度的非线性，这是由于损失 多模光纤中的高阶模式。 该比率的变化改变了光纤的吸收系数，可用于补偿任何响应的非线性。 还公开了其他补偿技术。