公开(公告)号：US07418171B2

公开(公告)日：2008-08-26

申请号：US10966317

申请日：2004-10-15

申请人： Kenneth Thomas Victor Grattan ,  Tong Sun ,  Weizhong Zhao

发明人： Kenneth Thomas Victor Grattan ,  Tong Sun ,  Weizhong Zhao

IPC分类号： G02B6/34

CPC分类号： G01K11/3206 ,  G01L1/242

摘要： A method and device for sensing spatial variations and/or temperature variations in the locality of a fiber optic cable 1 is disclosed, wherein a broadband light source 47 is used to shine incident light onto a series of fiber Bragg gratings contained within zones A, B and C. Each zone contains a plurality of fiber Bragg gratings, the plurality of fiber Bragg gratings in any one zone having a substantially identical grating period, and the fiber Bragg gratings in the respective zones having different grating periods. The reflected light from each fiber Bragg grating is returned back down the fiber optic cable 1 and redirected via a 2×1 coupler 51 to a wavelength detection system 53 and a personal computer 63. The combination of wavelength detection system 53 and personal computer 63 allow analysis of the reflected light patterns, as well as providing a user interface which enables detection of the occurrence of a spatial and/or a temperature variation. The location of the said variation along the fiber optic cable 1 is advantageously detectable in terms of the particular zone A, B or C in which the said variation has been sensed.

摘要翻译： 公开了一种用于感测光纤电缆1的位置的空间变化和/或温度变化的方法和装置，其中宽带光源47用于将入射光照射到包含在区域A，B内的一系列光纤布拉格光栅 每个区域包含多个光纤布拉格光栅，在任何一个区域中的多个光纤布拉格光栅具有基本上相同的光栅周期，并且各个区域中的光纤布拉格光栅具有不同的光栅周期。 来自每个光纤布拉格光栅的反射光从光纤电缆1返回并经由2×1耦合器51重定向到波长检测系统53和个人计算机63。 波长检测系统53和个人计算机63的组合允许对反射光图案的分析，以及提供能够检测空间和/或温度变化的发生的用户界面。 沿着光纤电缆1的所述变化的位置可以根据感测到所述变化的特定区域A，B或C进行检测。