公开(公告)号：US20200340871A1

公开(公告)日：2020-10-29

申请号：US16961160

申请日：2019-01-10

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： IL-BUM KWON ,  Dae-Cheol SEO ,  Chi Yup KIM

IPC: G01L1/24 ,  G01D5/353

Abstract: An apparatus and method for detecting composite material damage due to impact by using distributed optical fiber are disclosed. In the apparatus and method for detecting composite material damage due to impact by using distributed optical fiber, the position and level of damage occurring in a composite material due to low-velocity impact can be effectively and economically detected by measuring the residual strain of optical fiber distributed on the surface of the composite material or inside the composite material. In the apparatus and method for detecting composite material damage due to impact by using distributed optical fiber, there is no need to always operate a sensor in real time, so that detection errors due to temporary failures, malfunctions, etc. of the sensor, as well as a problem of constantly supplying power to the sensor, can be essentially removed.

公开(公告)号：US20160216166A1

公开(公告)日：2016-07-28

申请号：US15025334

申请日：2014-09-30

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： IL-BUM KWON ,  JOO EUN IM ,  MI HYUN KIM ,  KI SUN CHOI

IPC: G01L1/24 ,  G01B11/16

CPC classification number: G01L1/246 ,  G01B1/00 ,  G01B11/16 ,  G01B11/165 ,  G01B11/18 ,  G01D5/353 ,  G01D5/35316 ,  G01D5/3537

Abstract: The present invention relates to an FBG sensor for measuring a maximum strain of an object being measured, a method for manufacturing the sensor, and a method of using the sensor. To this end, provided is the FBG sensor for measuring a maximum strain, comprising: an optical fiber (130) having an FBG sensor (150) therein; a first metallic foil (120) contacting the optical fiber (130) on one surface thereof; a second metallic foil (120) which comes into surface-contact with the one surface; an adhesive layer (140) provided between the first and second metallic foils (100, 120); a means for measuring a residual strain of the first and second metallic foils (100, 120) through the FBG sensor (150); and a means for calculating a maximum strain on the basis of the measured residual strain and a sensitivity coefficient (Csen) obtained through experimentation.

Abstract translation: 本发明涉及一种用于测量待测物体的最大应变的FBG传感器，一种用于制造传感器的方法，以及使用该传感器的方法。 为此，提供了用于测量最大应变的FBG传感器，包括：其中具有FBG传感器（150）的光纤（130）; 在其一个表面上接触光纤（130）的第一金属箔（120）; 与所述一个表面进行表面接触的第二金属箔（120）; 设置在第一和第二金属箔（100,120）之间的粘合层（140）; 用于测量通过FBG传感器（150）的第一和第二金属箔（100,120）的残余应变的装置; 以及基于通过实验获得的测量的残余应变和灵敏度系数（Csen）来计算最大应变的方法。