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고성능 카메라를 이용한 철도차량 주행장치용 고속스케닝시스템 개발
허성범,권석진,이희성 한국도시철도학회 2019 한국도시철도학회논문집 Vol.7 No.3
Deformation and breakage of important components of a railway vehicle at high speeds can cause derailment, and it is necessary to scan for deformation and breakage of railway vehicle components in advance. Recently, a system for detecting the deformation of major units using a high-performance camera has been actively studied. In this study, the real-time inspection system using a high-performance camera was evaluated for the deformation and breakage of the main components of high-speed vehicles. The test results show that the system which developed in this study is 85% reliability. 고속 주행시 철도차량의 중요한 부품의 변형과 파손은 탈선 사고를 발생시킬 수 있으며, 철도차량부품들의 변형과 탈락을 사전에 스캐닝하는 것이 필요하다. 최근에는 고성능 카메라를 이용하여 휙득한 이미지로 주요 부품들의 변형상태를 검지하는 시스템에 대한 연구가 활발하게 진행되고 있다. 본 연구에서는 고성능 카메라를 이용한 실시간 검사시스템으로 주행시 고속차량의 주요 장치의 변형과 탈락 상태를 평가하였다. 본 연구의 구축 시스템의 시험결과, 시스템이 85%의 신뢰성을 나타내고 있음을 보여주고 있다.
Bioinspired Adhesive Coating on PET Film for Antifouling Surface Modification
허성범,김지흥,전영실,김승일,김수현 한국고분자학회 2014 Macromolecular Research Vol.22 No.2
One of the most common approaches to preparing antifouling surfaces is the immobilization of poly(ethyleneglycol), which is known as PEGylation. In addition, the catechol functional group of dopamine (3,4-dihydroxyphenethylamine)has the capacity to create a strong coordinate bond with inorganic and organic surfaces in an aqueousenvironment. We synthesized novel polyaspartamide derivatives containing poly(ethylene glycol) and catechol pendantgroups, and the same polymers in a pH-controlled aqueous solution were successfully employed to modify apoly(ethylene terephthalate) (PET) surface using a simple immersion method. Contact angle measurements, X-rayphotoelectron spectroscopy, attenuated total reflectance-infrared spectroscopy, and atomic force microscopy were usedto verify the surface coating on the PET substrate. Also, the cytotoxicity and antifouling properties were evaluatedby protein adsorption and platelet adhesion tests of the coated materials. This biocompatible polymer has potentialas an adhesive coating and for the surface modification of various biomaterials.