• Journal of the Korean Institute of Gas
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• v.26 no.1
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• pp.7-19
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• 2022

Hydrogen purification is generally performed through chemical and physical methods. Among various types of purification method PSA(Pressure Swing Adsorption) is widely used with its purification capacity and economic efficiency. In Korea, most of the hydrogen used in automobiles and power generation fuel cells is purified using PSA. Hydrogen produced in petrochemical complexes has difficulties in transportation. The government is planning to install hydrogen extractors that produce hydrogen directly from consumers in connection with the city gas supply chain, and companies are also installing related research and demonstration facilities one after another. Europe and others have recently established safety standards related to PSA and are making efforts for systematic safety management at the construction and operation stage, but domestic safety standards related to PSA are still insufficient. This study aims to identify problems of existing facilities through surveys and risk assessment by companies operating existing PSA, and to prepare domestic technical standards including them in overseas technical standards to promote the safety of new and existing PSA systems.

• Transactions of the Korean Society of Automotive Engineers
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• v.14 no.5
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• pp.186-194
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• 2006

Traffic accident involved with the vulnerable pedestrian is one of the significant concerns, which has higher possibility of fatality than any other accident types. Worldwide significant efforts have been made to establish a vehicle safety regulation, which is internationally agreed, in order to reduce pedestrian casualties in pedestrian-vehicle collisions. One of the key issues in deriving the regulation is how to effectively select the parameter values associated with the regulation. This study firstly develops a method to optimize parameter values. An optimizing problem in terms of maximizing safety benefits, which are life-saving effects by the regulation, is formulated. Extensive actual accident data analysis and simulations are conducted to establish several statistical models to be used in the proposed optimization procedure. A set of parameter values that can produce maximizing life-saving effects is presented as the outcome of this study. It is expected that the proposed method would play a significant role in determining parameters as a decision support tool toward ensuring better pedestrian safety.

• Journal of Auto-vehicle Safety Association
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• v.11 no.1
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• pp.36-39
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• 2019

The particulate matter that was emitted always come up by atmospheric environmental problem. Running on the road vehicles must have regular inspection at regular period and make sure the emissions of exhaust gases exceed the legal standards. Emission test for the atmospheric environment, but it is not free from the particulate matter. Currently, emission test of vehicle inspection is divided into regular inspection and close inspection. Regular inspection and close inspection differ not only the method of emission test, but also the facility standards that must have for this inspection. According to the "Regulations on the Implementation of Comprehensive vehicle Inspection, etc.", close inspection must have trapping device that is trap particulate matter by emission test to vehicle. However, regular inspection is different. Regular inspection do not specify any criteria for trapping facilities. Therefore, this study is confirm how to prevent the emission of particulate matter to the atmosphere during the year when mandatory trapping facilities are required to trapped particulate matter in the regular inspection.

• Journal of the Korean Society of Marine Environment & Safety
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• v.23 no.1
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• pp.67-72
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• 2017

This study developed an electric power propulsion personal watercraft by combining a battery and an electric system from the domestic automobile industry with water motorcycle from marine leisure industry in a convergence of technology. It also developed a safety inspection plan and type approval standard for personal watercraft that use electric power propulsion. For the registration and production of the electric power PWC (Personal Watercraft), a safety inspection standard (draft) and type approval standard (draft) have been established. PWC that use this electric power propulsion certification standard have been divided into two categories according to the use of gasoline engines as related to the ship's electrical system. The contents of these safety inspections standards is divided into 7 categories, and their purpose is to confirm the facilities used for the safe operation of PWC. Type approval is divided into 7 categories and is intended to ensure the safe production of PWC. This is basic data can be used to establish criteria for safety inspection and type approval of electric power propulsion vessels and to guide the production of the environmentally friendly PWC in Korea.

• The monthly packaging world
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• s.242
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• pp.100-109
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• 2013

해양수산부(장관 윤진숙)는 위험물의 분류기준을 국제기준과 동일하게 적용하고 위험물질 운송에 따른 안전성 제고를 위해 "위험물 선박운송 기준"을 개정하여 시행한다고 밝혔다. 개정된 기준은 국제적으로 적용되는 "국제해상위험물규칙"(IMDG Code)의 최근 개정내용을 반영하고, 위험물 및 화물구역의 종류별 방화장치 요건을 강화하여 위험화물로 인한 선박의 화재 및 폭발 사고가 감소될 것으로 기대된다. 특히, 위험물 운송 용기를 용기의 종류, 재료 및 형태별로 구분하고 외관, 구조 및 성능검사로 세분하여 위험물 용기 검사체계를 효율화함으로써 민원인의 편의를 도모하였으며, 또한, 국제기준에 따라 자동차를 일반선박이나 컨테이너에 수납하여 운반하는 경우 위험물로 분류되어 위험물수납 검사대상이 된다. 본 고에서는 "위험물 선박운송 기준" 일부 개정(안)에 대해 살펴보도록 한다.

• Transactions of the Korean Society of Automotive Engineers
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• v.11 no.4
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• pp.102-109
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• 2003

Safety and comfort are importance concepts for designers of vehicle seats and instrument panels. There have been a lot of researches on comfortable sitting postures, however, relatively a few researchers have tried to find a desirable driving posture in consideration of both comfort and safety. This study investigates a relationship between comfort and safety of sitting posture of a driver. Since a seat is closely related to comfort, the angular data of comfortable sitting posture were obtained through the correlation between the seat and the driver. In order to acquire the data of safe sitting posture, computer simulations were performed for various seatback angles. Based on comparing and analyzing the data obtained, the optimal sitting posture is suggested for both comfort and safety aspects.

• Proceedings of the Acoustical Society of Korea Conference
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• 1998.06e
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• pp.381-384
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• 1998

본 논문은 주행중인 자동차 환경에서 운전자의 안전성 및 편의성의 동시 확보를 위하여, 보조적인 스위치 조작없이 상시 음성의 입, 출력이 가능하도록 한다. 이때 잡음에 강인한 threshold 값을 구하기 위하여, 일정한 시간마다 기준 에너지와 영교차율(Zero Crossing Rate)을 변경하며, 밴드패스 필터(bandpass filter)를 이용하여 1차, 2차로 나누어 실시간 상태에서 자동으로, 정확하게 끝점검출(End Point Detection)을 처리한다. 기준패턴(reference pattern)은 DMS(Dynamic Multi-Section)을 사용하며, 화자의 변별력을 높이기 위하여 2개의 모델사용을 제안한다. 또한 주행중인 차량의 잡음환경에 강인하기 위하여 일반주행(80km/h 이내), 고속주행(80km/h 이상)등으로 나누며 차량의 가변잡음 크기에 따라 자동으로 선택하도록 한다. 음성의 특징 벡터와 인식 알고리즘은 PLP 13차와 One-Stage Dynamic Programming (OSDP)를 이용한다. 실험결과, 자주 사용되는 차량 편의장치 제어명령 33개에 대하여 중부, 영동 고속도로(시속 80Km/h 이상)에서 화자독립 89.75%, 화자종속 90.08%의 인식율을 구하였으며, 경부 고속도로에서는 화자독립 92.29%, 화자종속 92.42%의 인식율을 구하였다. 그리고 저속 주행중인 자동차 환경(80km/h 이내, 시멘트, 아스팔트 등의 서울시내 및 시외독립)에서는 화자독립 92.89%, 화자종속 94.44% 인식율을 구하였다.

• Proceedings of the KIEE Conference
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• 2009.04a
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• pp.200-202
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• 2009

본 논문에서는 수소연료전지자동차의 고전압 시스템에서 직 간접접촉에 의한 인체 감전사고를 방지하기 위한 전기안전 평가기법인 절연저항과 전기적연속성 등에 대하여 분석하였다. ISO, UNECE, Japan Attachment 등의 외국 규격에서는 감전보호를 위한 평가 기준을 제시하고 있지만 세부적인 평가방법에 대해서는 명확하게 규정하고 있지 않기 때문에 전기안전 평가를 위한 측정방법 및 측정장비에 대한 최소한의 기준 정립이 필요한 실정이다. 따라서 본 연구에서는 전기안전 평가기법에 대한 HFCV 실차 상태의 실험을 통하여 나타난 문제점 분석을 통하여 감전보호를 위한 전기안전 평가기법 중 전기적 연속성 및 절연저항에 대한 측정방법과 측정장비의 사양에 대하여 제시하고자 한다.

• Transactions of the Korean Society of Automotive Engineers
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• v.17 no.1
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• pp.176-181
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• 2009

The passenger airbag(PAB) designed for standard sized adults may induce unexpected results to children in out-of-position(OOP) postures. In this work, using MADYMO software, simulations of the OOP injury of children have been performed with respect to PAB design parameters and child dummy positions. The attention is focused on some details with respect to the injury of 3 and 6 year old children in two OOP postures. Among the various design parameters of the passenger airbag systems, four parameters are selected for the sensitivity analysis of the injury with the Taguchi method: bag folding pattern, vent hole size, position of the cover tear seam and the type of door tear seam. An optimal combination of the parameters is suggested.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 1994.04a
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• pp.172-178
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• 1994

본 연구에서는 경음기 본래의 사용 목적인 안전운행을 저해하지 않으면서 사용할 수 잇는 보다 혐오감이 덜한 음질의 경적음을 도출하고자 국내에서 생산, 유통되고 있는 경음기의 현황 파악 및 종류별 경적음의 특성을 분석하고, 이들의 단음과 복합음을 녹음.재생하면서 상호간에 대한 주관적 반응을 설문 조사하여 경음기 1개 장착시 단음 피크치의 음역별 음질과 2개 장착시의 복합음 음질개선을 위한 적정 주파수범위를 도출하고자 하였다. 그리고 자동차 생산공장에 출장하여 차량에 장착된 경음기의 경적음 특성을 분석하여, 그 음량의 크기와 dB(A) 및 dB(C)의 차이와 국내.외 자동차의 경적음에 대한 관리 및 규제 기준을 수집, 분석하여, 소음진동규제법과 한국공업규격에 서로 다르게 규정하고 있는 평가단위를 통일하고자 하였다.