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원전격납건물 계측용 광섬유 FBG 센서 패키지의 보정 방법
조명석 ( Cho Myung-seok ),김종우 ( Kim Jong-woo ),윤덕중 ( Yun Deok-jung ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
Optical fiber FBG(Fiber Bragg Grating) sensors are able to measure small deformations, caused by external forces, by measuring the reflected wave-length of the FBGs. But as a specific character optical fibers are brittle and infirm of tensile forces. So we need to design a device for protecting the optical fibers in long distance measurements. In this paper we suggested a sensor package using FBG sensors. Eventually to measure the behaviors of the Containment Structure of Nuclear power plants during the pressurizing for the Structural Intetgrity Test(SIT). This is to alternate the existing method using invar wires. Because of the low accuracy from it’s self weight and occur of electric noise in the existing methods. As a result, to ensure reliability of the sensor package we performed a displacement control and temperature variation test. From these test results we obtained the correction method of the suggested FBG sensor packages.
조명석(Cho Myung suk),송영철(Song Young-Chul),노재명(Noh Jea-Myoung),김도겸(Kim Do-Gyum) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.2
It was proved of the performance and applicability of the organic and inorganic surface penetration supplement developed for aging prevention and durability performance by the used years of concrete structure through experimental method. This article synthesized an inorganic material, TEOS (tetra-ethoxyorthosilicate) and organic material, Acrylate monomer in a way of solution poly-condensation method, induced the performance betterment effect of concrete through the endurance performance improvement of silicate by sol-gel process, and the formation of a soft and flexible impact buffer layer by an organic monomer, and improved aging inhibition performance after concrete penetration by adding Isobutyl-orthosilicate as a performance improvement substance. The developed organic and inorganic surface penetration supplement refills concrete internal gap with physically, chemically stable compounds after penetration, has a high effect in increasing pressure strength by concrete reinforcement, improving durability to use environmental aging factors such as damage from sea wind, carbonation, freezing and fusing and multiple aging, so it is available as the effective life management technique of concrete structure.
조명석 ( Cho Myung Suk ),송영철 ( Song Young-chul ),노재명 ( Noh Jea-myoung ),김도겸 ( Kim Do-gyum ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
It was proved of the performance and applicability of the organic and inorganic surface penetration supplement developed for aging prevention and durability performance by the used years of concrete structure through experimental method. This article synthesized an inorganic material, TEOS (tetra-ethoxyorthosilicate) and organic material, Acrylate monomer in a way of solution poly-condensation method, induced the performance betterment effect of concrete through the endurance performance improvement of silicate by sol-gel process, and the formation of a soft and flexible impact buffer layer by an organic monomer, and improved aging inhibition performance after concrete penetration by adding Isobutyl-orthosilicate as a performance improvement substance. The developed organic and inorganic surface penetration supplement refills concrete internal gap with physically, chemically stable compounds after penetration, has a high effect in increasing pressure strength by concrete reinforcement, improving durability to use environmental aging factors such as damage from sea wind, carbonation, freezing and fusing and multiple aging, so it is available as the effective life management technique of concrete structure.