利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.012 秒)

    Physical quantity measuring method using Brillouin optical fiber sensor
    1.
    发明授权
    Physical quantity measuring method using Brillouin optical fiber sensor 失效
    使用布里渊光纤传感器的物理量测量方法

    公开(公告)号：US07227123B2

    公开(公告)日：2007-06-05

    申请号：US11062714

    申请日：2005-02-22

    申请人： Il Bum Kwon ,  Dong Jin Yoon ,  Jeong Joo Lee ,  Sang Hun Kim

    发明人： Il Bum Kwon ,  Dong Jin Yoon ,  Jeong Joo Lee ,  Sang Hun Kim

    IPC分类号： G01J1/04 ,  H01S3/00 ,  G02B6/00 ,  G01N21/00

    CPC分类号： G01B11/18 ,  G01D5/35348 ,  G01K11/32 ,  G01K2011/322 ,  G01K2213/00 ,  G01L1/242 ,  G01M11/085

    摘要： Provided is a physical quantity measuring method using a Brillouin optical fiber sensor. An optical fiber is set on a structure and a pair of pulse lights having different pulse widths is selected. The pulse lights are sequentially transmitted through the optical fiber to obtain back scattering lights and Brillouin gain spectra. The Brillouin gain spectra are compared to each other to calculate a normalized spectrum and a Brillouin frequency is acquired based on the normalized spectrum. The Brillouin frequency is multiplied by a conversion factor of a corresponding physical quantity of the structure to obtain the physical quantity. Accordingly, a portion of the optical fiber from which a sensing signal can be acquired is shortened to improve spatial resolution.

    摘要翻译： 提供了使用布里渊光纤传感器的物理量测量方法。 将光纤设置在结构上，并选择具有不同脉冲宽度的一对脉冲光。 脉冲光依次通过光纤传输，以获得反向散射光和布里渊增益光谱。 将布里渊增益谱相互比较以计算归一化光谱，并基于归一化光谱获取布里渊频率。 将布里渊频率乘以该结构的相应物理量的转换因子以获得物理量。 因此，能够获取感测信号的光纤的一部分被缩短以提高空间分辨率。

    Transmission-type extrinsic fabry-perot interferometric optical fiber sensor
    3.
    发明授权
    Transmission-type extrinsic fabry-perot interferometric optical fiber sensor 失效
    传输型外在光纤干涉光纤传感器

    公开(公告)号：US06687011B1

    公开(公告)日：2004-02-03

    申请号：US09469756

    申请日：1999-12-22

    申请人： Jung Ju Lee ,  San Hoon Kim ,  Dong Chun Lee ,  Il Bum Kwon

    发明人： Jung Ju Lee ,  San Hoon Kim ,  Dong Chun Lee ,  Il Bum Kwon

    IPC分类号： G01B902

    CPC分类号： G01B11/161 ,  G01B2290/25 ,  G01D5/266 ,  G01D5/268 ,  G01K5/486 ,  G01K11/32 ,  G01K11/3206

    摘要： A transmission-type extrinsic Fabry-Perot interferometric optical fiber sensor and a method used for integrity monitoring of structures and measuring strain and temperature are provided. The transmission-type extrinsic Fabry-Perot interferometric optical fiber sensor includes first single-mode optical fiber and second single-mode optical fiber, laser device, and optical detector. The first single-mode optical fiber is inserted into an end of a capillary quartz-glass tube and the second single-mode optical fiber is inserted into the other end of the capillary quartz-glass tube. Air gap is formed between the first single-mode optical fiber and the second single-mode optical fiber in the capillary quartz-glass tube. Gap length of the air gap changes in response to magnitude and direction of transformation of the capillary quartz-glass tube. The laser device launches light into an end of the first single-mode optical fiber. The end of the first single-mode optical fiber is not inserted into the capillary quartz-glass tube. The optical detector detects interferometric fringe of light. The light is launched from the laser device and passed through the first single-mode optical fiber, the air gap, and the second single-mode optical fiber. The number of occurrence of the interferometric fringe and trend of signal level are determined by change of the gap length.

    摘要翻译： 提供了透射型外部法布里 - 珀罗干涉光纤传感器和用于结构的完整性监测和测量应变和温度的方法。 透射型外部法布里 - 珀罗干涉光纤传感器包括第一单模光纤和第二单模光纤，激光器件和光检测器。 将第一单模光纤插入毛细管石英玻璃管的一端，将第二单模光纤插入毛细管石英玻璃管的另一端。 在毛细管石英玻璃管中的第一单模光纤与第二单模光纤之间形成气隙。 气隙的间隙长度随着毛细管石英玻璃管的转变的大小和方向而变化。 激光装置将光线发射到第一单模光纤的一端。 第一单模光纤的末端未插入毛细管石英玻璃管中。 光学检测器检测干涉光线条纹。 光从激光装置发射并通过第一单模光纤，气隙和第二单模光纤。 干涉条纹的发生次数和信号电平的趋势由间隙长度的变化决定。