• Journal of the Korea institute for structural maintenance and inspection
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• v.15 no.5
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• pp.160-168
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• 2011

As importance of the field of maintenance and management come to the fore because of collapses of the Seongsu bridge and the Sampoong department store, "Special Act for the Safety Control of Public Structures" was established in 1995 and the major maintenance and management system began taking effect "Detailed inspection and Precision safety diagnosis". However, a technical standard of "Detailed inspection and Precision safety diagnosis" was low because its history was not long, and also the results of research were not enough so anxiety for "Insufficient Detailed inspection and Precision safety diagnosis" was continuously left. While its evaluation system introduced in 2002, the ratio of "Insufficient Detailed inspection and Precision safety diagnosis" has been getting lower. However, according to the evaluation result after carrying out "Detailed inspection and Precision safety diagnosis" recently, it seems difficult to become lower for the ratio of "Insufficient Detailed inspection and Precision safety diagnosis" in future. Therefore, it is considered of questionary survey of the concerned organization and the mechanism side in connection with "Insufficient Detailed inspection and Precision safety diagnosis". So it is arranged the fundamental problems caused by an "Insufficient Detailed inspection and Precision safety diagnosis" that is to show the improving direction of the existing evaluation system in a based on this.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.442-443
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• 2011

22.9kV 가공배전설비 진단방법으로 고주파, 초음파, 열화상, 광학, 활선기별점검이 대표적으로 적용되고 있다. 진단장비로 적출된 가공 배전설비는 광학진단이나 활선기별점검을 통해 기자재의 외관상태등을 최종적으로 확인한다. 활선기별점검은 고(高)비용이며 활선작업차(화석에너지), 활선자격, 다수인원이 필요하고 하천횡단, 장경간, 장척전주, 진입곤란개소 등은 진단점검이 곤란하며 광학진단은 기자재 상부를 진단 할 수 없다는 제약이 있다. 본 논문에서는 항공 원격제어 헬기를 통해 22.9kV 가공배전선로에 근접하여 기자재 상태 확인 방법을 최초로 적용하여 기존의 활선기별 점검 및 광학진단 점검의 문제점을 해소하는데 효과적이었으며, 비용절감과 안전확보, 기존방법에서 점검이 곤란한 사항도 해소는 물론 Green Energy정책에 기여할 수 있었다.

• Journal of Korean Tunnelling and Underground Space Association
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• v.22 no.6
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• pp.643-653
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• 2020

The concrete lining inspection by inspector after traffic control poses various problems such as congestion caused by traffic control and social loss costs resulting from it, and risks of traffic accidents and safety accidents for inspectors et al. To solve the problems, the concrete lining inspection has been carried out using automatic inspection equipment and image analysis that can be objectively and quantitatively investigated in overseas. In this study, to solve the problems of concrete lining inspection by inspector and to review improvement plan for inspection, inspection was carried out using automatic inspection equipment for ◯◯ tunnel that precision safety diagnosis has been conducted in 2019. Analysis was carried out for both inspection results. Automatic inspection equipment investigated defects in concrete lining such as cracks more accurately than precision safety diagnosis.

• Journal of the Korea institute for structural maintenance and inspection
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• v.14 no.6
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• pp.246-253
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• 2010

National major facilities have been rigorously investigated using regular safety inspections and precision safety diagnosis since the Special Law for Facilities Safety Management was made in 1995. However, the process of safety inspection and precision safety diagnosis could be doubted due to intervention of facility owner for safety level evaluation, competition to obtain low price order, and low technical skills of inspection companies. Although the management processes for evaluating the inspection companies were used for several years, the process should continue to improve in the safety inspection field. This study analyzed the recent evaluation system and the ratios of insufficient inspection. Estimation of national loss expenses to the insufficient safety inspection was investigated to recognize the necessity for the improvement of facility inspection process and evaluation system.

• Journal of Korean Society of Disaster and Security
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• v.15 no.4
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• pp.21-30
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• 2022

After the collapse of the Seongsu Bridge in 1994, the ｢Special Act on the Safety Control and Maintenance of Establishments｣ was enacted in Korea, and many efforts have been made in the field of safety inspection and maintenance of facilities. Among these facilities, a total of 33,165 bridges, which account for the largest share next to buildings, are currently in use, and 28,150 bridges of type 2 and 3 account for about 85% of the total. However, compared to the relatively more important type 1 bridges, type 2 and 3 bridges, which occupy most of the bridges, have insufficient maintenance status regarding inspection and diagnosis. This reason appears in the subjective judgment and records of the inspection performer when performing inspection and diagnosis of bridges, and in the inspection and diagnosis report form that has not been systematically established. Therefore, in this study, we intend to derive an improvement (draft) of the inspection and diagnosis report that can be systematically and continuously utilized by correcting and supplementing the problems of the existing inspection and diagnosis report.

• Journal of the Korea institute for structural maintenance and inspection
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• v.20 no.5
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• pp.50-57
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• 2016

The present study proposed three inspection reliability indices which compared inspection results evaluated at in-depth(routine) inspection and in-depth safety inspection; Nominal inspection reliability index, Real inspection reliability index, and DS nominal inspection reliability index. The methods to improve the inspection reliability were also proposed. Since bridge inspection process is critical to ensuring the safety of bridges and identifying repair and maintenance needs, the quality of the inspection data produced from the inspection process is very important. Consequently, the inspection reliability indices were suggested to evaluate quality of current inspection practices. Specifically, approximately 85% of inspection errors evaluated by the DS nominal inspection reliability index are within 1 rating grade(equal to or less than damage score ${\pm}0.1$). In order to improve the inspection reliability, transportation agency should implement QC(Quality Control) practices and develop professional expertises of inspectors by higher requirements for inspectors, on-off line inspection training and etc.

• Journal of the Korean Geosynthetics Society
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• v.13 no.4
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• pp.133-141
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• 2014

This study was carried out to establish the database system by using the safety inspection and in-depth inspection results for infrastructures such as bridges, tunnels, dams, and water supplies. A classification system of each facility was proposed by standardizing items for inspection & diagnosis in order to automatize work process. Also, it justifies data structure based on database from pre-investigation to field survey, evaluation of facilities, and report making. In addition to this, it suggests improvement plans of relative regulations and guidelines such as Facility Management System(FMS), operational regulation, and inspection detailed guideline to make inspection result database of infrastructures which can be used effectively.

• 전기의세계
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• v.45 no.4
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• pp.5-12
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• 1996

지금까지 변압기의 유지보수는 일상순시와 전력설비를 일정기간 사용함에 따른 정기점검에 의하여 불량개소를 발견하고 보수하는 일정주기에 따른 예방보수를 하였으나, 경제적인 유지와 신뢰성 있는 전력공급을 위하여 변압기의 상태를 점검하여 정비하는 상태점검으로 전환하고 있다. 따라서 최근에는 변압기의 이상징후를 운전상태(on-line)에서 상시 감시하여 장래에 일어날 사태 등을 예측하고 그것이 치명적이기 이전에 처리하는 예측보전기술 중심으로 변하고 있다. 변압기의 내부이상을 진단하는 방법으로는 부분방전법, 절연유의 특성시험 및 가스분석법, 역률측정법, 저압서어지 시험법 등이 있으나, 진단방법의 특성 및 신뢰성을 고려할 때, 어느 한 방법으로는 불충분하므로 각종 진단 결과의 종합분석이 필요하다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2016.11a
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• pp.186-187
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• 2016

본 논문에서는 평소 사람이 접근하기 어려워 점검이 힘들었던 대형구조물에 대하여 드론을 활용한 안전점검의 활용 가능성을 기획하였으며, 지상에서 식별하기 힘들거나 육안만으로 찾기 힘든 구조물을 근접 촬영하고 열화상 카메라를 이용해 구조물의 상태를 정밀 점검하고자 한다. 국내 최초로 드론을 활용하여 정밀 안전진단에 활용 가능한지에 대한 검토와 일반 안전진단과의 차별성 및 비교를 통해 향후 드론에 미치는 영향을 검토하고자 한다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.279-280
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• 2022

연구실안전법에 따라 모든 연구실은 주기적으로 안전점검과 정밀안전진단을 통해 안전을 확보하고 안전환경 상태에 따라 미흡한 평가등급을 받으면 연구 활동에 제약을 받는 제도가 시행되고 있다. 하지만 현재의 점검 및 진단제도는 안전분야별 각 점검항목에 대해 양호, 주의 및 불량 등 이상 3가지로만 평가하고 있으며 각 점검항목에 대해서도 안전에 미치는 영향에 따른 가중치가 고려되지 않아 평가 대상 연구실에 대한 종합적인 안전수준을 확인하는 데 한계가 있다. 이에 연구실 안전전반에 관한 점검항목을 추가하고 평가기준도 가중치를 고려하여 평가결과가 정량적인 점수로 도출될 수 있도록 개선하여 연구주체자가 평가점수를 향상해감으로써 연구실 안전수준을 향상해 갈 수 있도록 방법을 제안해 보고자 한다.