• 대한토목학회논문집
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• 제35권6호
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• pp.1297-1308
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• 2015

우리나라는 교통안전법에 의해 지역교통안전기본계획을 수립 시행하고 있다. 지자체별 맞춤형 교통안전시책 수립을 통해 교통안전 향상을 위한 대책 수립 및 역할분담이 강조되고 있으며, 이는 곧 지자체가 지역실정에 맞는 내실 있는 지역교통안전 정책을 실질적으로 주도하여 추진하는 것을 의미한다. 지자체들이 가지고 있는 다면적인 특성에 부합되는 효율적인 교통안전정책이 시행되기 위해서는 지역특성을 고려한 지역단위 교통사고를 예측하고 사고에 미치는 영향요인 분석이 선행되어야 하지만 이에 대한 연구는 미흡한 실정이다. 지역을 기반으로 하는 교통사고 예측에 관한 기존 연구들은 자료 수집의 한계로 대부분 국가 또는 도시를 분석단위로 사고노출환경과 관련되는 사회경제변수들을 활용한 연구가 대부분이었다. 교통사고 예측모형을 개발하는 이유는 교통사고 발생특성을 파악하여 교통사고를 줄일 수 있는 효율적인 대책을 발굴하는 것이 주요 목적이다. 이에 본 연구에서는 기존연구에서 다루지 못한 보다 작은 지역단위인 행정동을 단위로 지역교통사고 예측모형을 개발하였으며, 사고 노출환경 측면의 사회경제적 변수 외 교통안전정책가가 제어할 수 있는 교통안전시설 및 정책변수를 모형에 반영하여 지역교통안전 정책 수립시 활용할 수 있는 방안을 제시하였다. 모형개발 결과 사고노출환경 측면에서는 도로연장, 건축물 총 연면적, 버스전용차로 설치율, 교차로 및 횡단보도 개소수는 사고와 양(+)의 관계를 보이고 있으며, 횡단보도예고 설치율, 과속방지턱 개소수 및 경찰인력에 의한 단속실적은 사고와 음(-)의 관계에 있는 것으로 나타났다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.872-880
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• 2011

In terms of accessibility and time the tram rail and bus transportation system is equipped with all the benefits of. In addition, construction and operating costs than light rail trams reduce AGT, and by car from the city center by inhibiting the transport demand management, pedestrian-oriented transportation system, including city jaebuheung can expect several effects, depending on the expected introduction of trams are. Accordingly, increasing interest in streetcars and trams, and the forum is running and the green at the National Assembly, Korea Railroad Research Institute samurai tram lines in the Korean research team developed the tram is thriving. In this study, in Korea as a way to introduce a tram tram to enhance the safety and reliability challenges for the advancement and promotion of foreign tram with the safety regulations and accident cases learn safety measures to strengthen the domestic transportation. The expected introduction of the tram fits the matter at issue and the perception of citizens and the passengers can make changes to present policies, the successful national introduction of trams and safety study aims to review.

• 한국산업융합학회 논문집
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• 제14권4호
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• pp.151-156
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• 2011

The domestic mine development community the countermeasure establishment is insufficient about ground sinkage, not only the mine which is a in line is partial from the mine of the most which has become the rest mine and abandoned mine or the index sinkage occurs. The ground sinkage which occurs from the abandoned mine area most after operation is stopped, a long time passes and accurately predicts an occurrence location and a time with the residual sinkage which occurs, is difficult. Underground goaf of the abandoned mine and the closed shaft When considering the potentiality which causes the instability of ground, is a possibility of reaching a damage in the ground infrastructure or life. The underground shaft which is formed specially with mine development and goaf operates with the obstacle factor in the development project of the mine area, the ground sinkage which is caused by with sinkage, operates with the large safety accident occurrence factor where the important infrastructure of the railroad, road, residential area etc. is damaged. Therefore, In this paper, the goaf cave of the abandoned mine area, for the displacement behavior according to the filling factor of the material is to analyze the numerical analysis.

• 대한안전경영과학회지
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• 제11권4호
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• pp.43-55
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• 2009

In terms of deregulation requests from business, incidents at construction sites are rapidly increasing after reducing the regular safety training hours. Especially, to prevent incidents through safety trainings for construction site workers, who have lots of hazardous tasks than general manufacturing, is not only to protect property of both the companies and the country but also to increase their profits. That is why there are loud voices regarding that the safety training is a core mandatory to prevent industrial incidents. But, most companies, as soon as the deregulation for safety training is implemented, mitigated conducting safety trainings to prevent incidents. With this, the incidents are currently to be increased and caught in a vicious circle of many incidents at the smaller companies because of their absentmindedness regarding safety training due to their poorness as subcontractors of major companies, comparing to major companies. This study explains that the difference between managers and workers are existing about safety awareness and knowledge. And, we confirmed that the educational factor led by deficiency of safety awareness and knowledge was the major factor.

• 비파괴검사학회지
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• 제31권4호
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• pp.398-413
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• 2011

철도 레일의 주기적인 탐상은 레일 결함으로 인해 발생할 수 있는 철도 중대사고를 미연에 방지할 수 있는, 철도 안전 유지의 중요한 요소 중 하나이다. 본 논문은 현재 철도 레일 탐상에 적용되고 있거나, 적용을 위해 연구 중인 비파괴탐상 기법들에 관해 기술하였다. 레일에 발생하는 결함 유형에 대해 우선 언급하였고, 레일 탐상에 가장 많이 적용되고 있는 압전형 탐촉자 기반의 초음파탐상 기술에 대해 정리하였다. 접촉식 초음파 레일 탐상 기술에 대한 대안으로서 연구 중이거나 시험 중인 비파괴탐상 기법들에 대해 기술하고, 각 기법 별로 레일의 표면 및 내부 결함 검출 가능 여부에 대해 살펴보았으며 여러 탐상 기법들에 대한 비교를 통해 향후 레일 탐상 기술 개발에 활용하고자 하였다.

• 전기학회논문지
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• 제63권11호
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• pp.1582-1587
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• 2014

In this paper, we perform a modeling for the AT Feeder system in AC electric railway and we utilize the power EMTDC program to implement about AT feeder system modeling. In addition, we study the impedance characteristics of the AT feeder system and calculated fault current and impedance according to the distance due to fault accident. Based on it's result, fault current are compared between calculating the value and simulation value in EMTDC modeling. Impedance of power system is Largest at the middle point of the system and is smallest near autotransformer, and then showed that the fault current is inversely proportional to impedance characteristics.

• 한국자동차공학회논문집
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• 제16권6호
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• pp.157-167
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• 2008

Through this study, the standard design guidelines for high speed train with power cars have been derived to meet the crashworthiness requirements of the Korean rollingstock safety regulation. The crashworthiness regulation requires some performance requirements for two heavy collision accident scenarios; a train-to-train collision at the relative speed of 36 kph, and a collision against a standard deformable obstacle of 15 ton at 110 kph. A standard high speed train composition was defined as 2PC-2ET-6T with 17ton axle load, similar to KTX-2 for the Honam express line. Using theoretical and numerical analyses, some crashworthy design guidelines were derived in terms of mean crush forces and energy absorptions for major crushable components. The derived design guidelines were evaluated and improved using one dimensional spring-mass dynamic simulation. It is shown from the simulation results that the suggested design guidelines can easily satisfy the domestic crashworthiness requirements.

• 한국소음진동공학회논문집
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• 제22권10호
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• pp.1010-1019
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• 2012

Non-contact detection of internal defects in a rail using ultrasonic waves is discussed in this paper. Cracks in a rail may be the cause of a serious railway accident such as derailment if left undetected. Concurrent rail inspection method based on ultrasonic testing using piezoelectric transducers has several limitations as it should keep physical contact with the rail. This work suggests a non-contact detection of internal defects in a rail using ElectroMagnetic Acoustic Transducers (EMAT) which can produce and measure ultrasonic waves in a rail without any couplant. The EMATs for rail inspection are designed and fabricated and their working performance is verified through a series of experiments on various types of internal defects in test rails. The effect of lift-off between the transducers and the rail on the generated signals is also discussed.

• International Journal of Advanced Culture Technology
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• 제10권4호
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• pp.569-575
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• 2022

This is a research thesis on the development of a monitoring and diagnosis device that prevents the risk of an accident through monitoring and diagnosis of a modular Main Circuit Breaker (MCB) using Vacuum Interrupter (VI) for Korean high-speed rolling stock. In this paper, a comprehensive MCB monitoring and diagnosis was performed by converging vacuum level diagnosis of interrupter, operating coil monitoring of MCB and environmental temperature/humidity monitoring of modular box. In addition, to develop an algorithm that is expected to have a similar data processing before the actual field test of the MCB monitoring and diagnosis device in 2023, the cluster analysis and factor analysis were performed using the WEKA data mining technique on the big data of Korean railroad transformer, which was previously researched by Tae Hee Evolution with KORAIL.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.381-382
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• 2023

Frequent accidents occur when workers at construction sites leave the safety zone, and particularly in the past 5 years, 9 fatal accidents occurred at the Korea Railroad Corporation due to train accidents on other tracks during track work. With the Severe Accident Punishment Act taking effect in January 2022, it is a priority to secure a safe work environment for workers at industrial (construction) sites. Therefore, there is a need to manage workers' departure from the safety zone (construction zone) and to facilitate communication within the construction zone. In this study, a mobile edge computing CCTV system is proposed that uses geofencing to determine whether workers are working in the danger zone, which can judge and respond in real-time to the ever-changing field environment. The proposed system is mobile and flexible, rather than server-based fixed CCTV. However, since it is designed mainly based on images, it has limitations in recognition rate depending on the environment such as distance, viewing angle, and illumination. As a way to compensate for this, it is required to develop more reliable equipment by combining technologies such as LiDAR and Radar.