KR960029549A - Bridge safety check method using fiber optic strain sensor - Google Patents

Bridge safety check method using fiber optic strain sensor Download PDF

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Publication number
KR960029549A
KR960029549A KR1019950000328A KR19950000328A KR960029549A KR 960029549 A KR960029549 A KR 960029549A KR 1019950000328 A KR1019950000328 A KR 1019950000328A KR 19950000328 A KR19950000328 A KR 19950000328A KR 960029549 A KR960029549 A KR 960029549A
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KR
South Korea
Prior art keywords
sensor
strain
bridge
change
optical fiber
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KR1019950000328A
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Korean (ko)
Inventor
김기수
오희갑
이상민
Original Assignee
우덕창
쌍용양회공업 주식회사
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Priority to KR1019950000328A priority Critical patent/KR960029549A/en
Publication of KR960029549A publication Critical patent/KR960029549A/en

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Abstract

본 발명은 일반적인 교량 구조물에 전자파 또는 전자기장에 상당히 안정하고 직경이 수십 마이크론 정도로 소형인 광섬유 센서를 메설하여 교량에 대한 하중 변화, 진동 변화 및 스트레인 레벨 변화를 측정함으로써 스트레인에 의한 교량의 붕괴를 장기적으로 미연에 방지할 수 있는 광섬유 스트레인 센서를 이용한 교량 안전점검 방법에 관한 것이다.The present invention is to install a fiber optic sensor that is fairly stable to electromagnetic waves or electromagnetic fields in a general bridge structure and small in diameter of several tens of microns and to measure the load change, vibration change and strain level change for the bridge to prevent the collapse of the bridge due to strain in the long term. The present invention relates to a bridge safety inspection method using an optical fiber strain sensor that can be prevented in advance.

본 발명의 방법은 광섬유 센서를 이용해서 보다 정확이 장기간 동안 교량 붕괴의 원인이 스트레인 발생을 미연에 방지할 수 있게된다.The method of the present invention makes it possible to prevent the occurrence of strain, which causes the bridge collapse for a longer period of time more accurately using the optical fiber sensor.

Description

광섬유 스트레인 센서를 이용한 교량 안전 점검 방법Bridge safety check method using fiber optic strain sensor

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 방법을 실시할 수 있는 교량 안전 점검 시스템의 개략적인 구성도이다. 제2도는 본 발명의 방법에 의해 측정한 하중에 따른 스트레인 변화 그래프이다. 제3도는 본 발명의 방법에 의해 측정한 차량 통과시 교량이 보여주는 스트레인 특성 및 진동 특성을 나타낸 그래프이다, 제4도는 본 발명의 방법에 따라 측정한 교량에 차량이 밀집되어 있을 때에 측정한 스트레인 레벨의 변화를 나타낸 그래프이다.1 is a schematic configuration diagram of a bridge safety inspection system capable of implementing the method of the present invention. 2 is a graph of strain variation with load measured by the method of the present invention. 3 is a graph showing strain and vibration characteristics of a bridge as it passes through the vehicle measured by the method of the present invention. FIG. 4 is a strain level measured when the vehicle is concentrated in a bridge measured according to the method of the present invention. A graph showing the change in.

Claims (4)

점검하고자 하는 교량의 교각 사이의 거더에 교량으로부터의 하중, 진동 및 스트레인을 감지할 수 있는 광섬유 스트레인 센서를 적어도 1개 매설 또는 부착시키고, 상기 센서로부터 출력된 신호를 제어하면서 하중 변화, 지동 및 감쇠, 스트레인 레벨 변화를 비교 측정하는 것으로 이루어지는 광섬유 스트레인 센서를 이용한 교량 안전 검검 방법.At least one fiber optic strain sensor is embedded or attached to the girder between the bridge piers to be inspected to detect loads, vibrations and strains from the bridge, and the load change, motion and attenuation while controlling the signal output from the sensor. And bridge safety inspection method using an optical fiber strain sensor, comprising measuring a change in strain level. 제1항에 있어서, 상기 광섬유 스트레인 센서로는 간섭형 광섬유 센서인 마이켈슨 센서, 마크젠더 센서, 패브리페로 센서, 편광 센서 또는 OTDR 방식의 센서를 선택 사용하여서 되는 것을 특징으로 하는 광섬유 스트레인 센서를 이용한 교량 안전 점검 방법.The optical fiber strain sensor according to claim 1, wherein the optical fiber strain sensor is an interference type optical fiber sensor such as a Michelson sensor, a mark gender sensor, a Fabry-Pero sensor, a polarization sensor, or an OTDR type sensor. How to check the bridge safety. 제1항에 있어서, 상기 하중 변화에 의한 측정은 교량에 가해지는 하중에 대한 진동 또는 스트레인 변화를 이전에 측정한 진동 또는 스트레인 변화와 비교하여 스트레인 또는 균열의 발생을 확인하는 것으로 이루어지는 것을 특징으로 하는 광섬유 스트레인 센서를 이용한 교량 안전 점검 방법.According to claim 1, wherein the measurement by the load change is characterized in that the occurrence of strain or cracks by comparing the vibration or strain change with respect to the load applied to the bridge compared with the previously measured vibration or strain change Bridge safety check method using fiber optic strain sensor. 제1항에 있어서, 상기 스트레인 레벨 변화의 측정은 교량이 견딜 수 있는 최대 스트레인 레벨을 기준으로 60% 이하로 스트레인 레벨이 유지될 수 있도록 설정하여서 됨을 특징으로 하는 광섬유 스트레인 센서를 이용한 교량 안전 점검 방법.The method of claim 1, wherein the measurement of the strain level change is performed such that the strain level can be maintained at 60% or less based on the maximum strain level that the bridge can withstand. . ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950000328A 1995-01-10 1995-01-10 Bridge safety check method using fiber optic strain sensor KR960029549A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100380639B1 (en) * 2000-09-16 2003-04-16 주식회사 아이세스 Compsite material reinforcement structure including optical fiber grating sensor
KR100436432B1 (en) * 2002-03-25 2004-06-16 한국표준과학연구원 Bridge safety diagnosis method and device
KR100447026B1 (en) * 2000-05-03 2004-09-07 한국표준과학연구원 Measuring/monitoring system for structures using network
KR100700805B1 (en) * 2004-11-15 2007-03-27 주식회사 브이테크 Bridge bearing with buit-in optic fiber sensor for measurement

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100447026B1 (en) * 2000-05-03 2004-09-07 한국표준과학연구원 Measuring/monitoring system for structures using network
KR100380639B1 (en) * 2000-09-16 2003-04-16 주식회사 아이세스 Compsite material reinforcement structure including optical fiber grating sensor
KR100436432B1 (en) * 2002-03-25 2004-06-16 한국표준과학연구원 Bridge safety diagnosis method and device
KR100700805B1 (en) * 2004-11-15 2007-03-27 주식회사 브이테크 Bridge bearing with buit-in optic fiber sensor for measurement

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