公开(公告)号：US11796406B2

公开(公告)日：2023-10-24

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 ,  G01M5/00

CPC classification number: G01L1/242 ,  G01D5/35351 ,  G01M5/0033

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：US11662229B2

公开(公告)日：2023-05-30

申请号：US17055037

申请日：2019-05-16

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Il-Bum Kwon ,  Dae-Cheol Seo ,  Chi-Yeop Kim ,  Bo-Hun Choi

IPC: G01D5/353 ,  G01K11/322 ,  G01L1/24

CPC classification number: G01D5/35364 ,  G01K11/322 ,  G01L1/242

Abstract: The present invention relates to an optical fiber BOCDA sensor. A purpose of the present invention is to provide an optical fiber BOCDA sensor which uses two phase codes to control a correlation peak position, thereby further simplifying control design and device configuration and improving spatial resolution to enhance a sensing performance and detection accuracy in comparison with the prior art.