公开(公告)号：US20140139841A1

公开(公告)日：2014-05-22

申请号：US13678979

申请日：2012-11-16

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Glen Peter Koste ,  Raymond Verle Jensen ,  Hua NMN Xia ,  Boon Kwee Lee ,  Victor Petrovich Ostroverkhov ,  Sachin Narahari Dekate ,  William Albert Challener

IPC: G02B6/34 ,  G01B9/02

CPC classification number: G02B6/34 ,  G01B9/02 ,  G01D5/35316 ,  G01D5/35358 ,  G01D5/3539

Abstract: Optical-based apparatus and method for sensing parameters in connection with an asset, such as a pipeline, are provided. At least two sites in an optical fiber may include a respective fiber grating arranged to have a respective optical response in a wavelength spectrum having a distinguishing feature indicative of a value of a respective local parameter at a respective grating site. The two fiber gratings may be further arranged to form, in combination with a respective portion of the optical fiber which extends between the two sites, respective optical backscatter portions that when combined with one another are effective to sense an optical change in the fiber portion between the sites indicative of a value of a distributed parameter. This is a parameter modality different from a parameter modality of the respective local parameters at the respective grating sites.

Abstract translation: 提供了用于感测与资产（例如管道）相关的参数的基于光学的装置和方法。 光纤中的至少两个位置可以包括相应的光纤光栅，其被布置为在具有指示相应光栅位置处的相应局部参数的值的区别特征的波长光谱中具有相应的光学响应。 两个光纤光栅可以进一步布置成与在两个位置之间延伸的光纤的相应部分组合形成相应的光学反向散射部分，当彼此组合时，有效地感测光纤部分之间的光学变化， 表示分布参数值的站点。 这是与各个光栅位置处的各个局部参数的参数模态不同的参数模态。