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펄스형 테라헤르츠파의 시간응답 특성을 통한 굴절률 및 두께 측정 알고리즘 개발
박동운(Dong-Woon Park),오경환(Gyung-hwan Oh),김덕중(Dug-Joong-Kim),김학성(Hak-Sung Kim) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
In this work, the pulse type therahertz time domain spectroscopy (THz–TDS) system was used for measuring the refractive index and thickness of EMC mold non-desructively. Based on terahertz time domain signals of transmission and normal mode, a theoretical model was developed to measure the refractive index of EMC Mold without measuring the thickness of EMC mold. In order to reduce the error that may occur when measuring therahertz signal, interpolation was applied to calculate the time delay. The refractive index of EMC Mold was measured using THZ-TDS system. At the same time, the thickenss of EMC Mold was calculated and compared to actual thickness which was measured through SEM.
박동운(Dong-woon Park),문경섭(Gung-sup Moon),이순영(Sun-young Lee),박수진(Su-jin Park),유완석(Wan-suk Yoo),이규상(Kyu-sang Lee) 한국자동차공학회 2003 한국자동차공학회 지부 학술대회 논문집 Vol.2003 No.10
As one of CRS(Child Restraint System), child seats are widely used. In this paper, the dynamic simulation of child seat was carried out with LS-DYNA software and the results from dynamic simulation were compared to the sled test. The comparison between the simulation and sled test showed a good agreement.<br/>