• Title/Summary/Keyword: facility condition inspection

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A Literature Review of Unmanned Aircraft System (UAS) Integrated Constructed Facility Condition Inspections (무인항공체계 기반 시설물 상태점검 최근 연구동향 분석)

  • Kwon, Jin-Hyeok;Yun, Jiyeong;Youn, JongYoung;Lee, Donghoon;Kim, Sungjin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2021.05a
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    • pp.172-173
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    • 2021
  • In recent, unmanned Aircraft Systems (UAS) have been widely used for various purposes, such as safety inspection, facility condition inspection, progress monitoring, in the architecture engineering, and construction (AEC) industry. This technology can provide visual assets regarding the conditions of construction jobsites as well as constructed facilities during flying over the point of interests. With the significant interests in this advancement, the recent studies have presented how the UAS can be applied fro different types of facilities (e.g., buildings, power genereation systems, roads, or bridges) to inspect the current conditions of them for safe operations as well as public's safety. This study reviewed the receent studies to document their scientific findings and practical contributions, as well as provided the overview of further implications for future studies.

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Study on a Optimal Inspection Cycle of Electrical facility of Railroad (철도전기설비의 최적점검주기에 관한 기초연구)

  • Chu, Cheol-Min;Kim, Jae-Chul;Lee, Tae-Hee;An, Jae-Min;Moon, Jong-Fil
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2007.05a
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    • pp.224-228
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    • 2007
  • It is focused on a methodology to establish a optimal inspection cycle of electrical facility of railroad Decision method of optimal inspection cycle is a process which establishes maintenance plan for facilities' immanent function as using reliability theory in operation term In order to ensure normal operation in a given condition, the decision method is logical for selecting effective maintenance plan to consider characteristic of system In estimation of failure rate, critical facility is selected firstly. After that, proper distribution function on each facility is decided to investigate distribution function for extraction of failure rate. Next, cost produced by the case that facility's failure is occurred is surveyed. Finally, maintenance method developed until now is investigated, before suitable model for the facility applying maintenance method is developed, and that maintenance decision is made. Therefore, this process is the method to find optimal inspection cycle for reasonable cost and effective reliability on facility.

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Development of E-PAD based condition evaluation system for facility safety inspection (시설물 안전점검을 위한 E-PAD 기반 상태평가 시스템 개발)

  • Jung, Hae-Yong;Lee, Heung-Su;Yi, Jong-Hwa;Kim, Young-Seok;Park, Chul
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.23 no.4
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    • pp.1-7
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    • 2019
  • As a unify operational processes of the safety inspection for major national facilities, it is expected that the efficiency and professionalism of the project will be enhanced. Also it is being emphasized that the importance of visual inspection that initially find physical and functional defects in facilities. In this study, we developed an E-PAD-based condition evaluation system to check the safety of the facility to overcome the problems and limitations of the existing inspection method. This system consists of introduction, work list, visual inspection, defect table and so on. It is possible to download the inspection drawings at the site and input the damage information to the drawings and check the evaluation grade. In order to verify the E-PAD based condition evaluation system, the inspection data of 10 sample bridges were inputted into the system and the evaluation results were compared. As a result, it was confirmed that the safety grade calculated from the system and the existing safety grade are the same. The feasibility analysis of the AHP method also showed that the function increased by 10%, cost by 36%, and value by 30% compared to the existing method. Therefore, it is expected to contribute to systematic data and information analysis system for improvement of facility management.

Structure stability study for existing subway tunnel segment of Seoul-Busan high-speed railroad (Daegu - Busan) construction (경부고속철도(대구-부산) 도심통과 노반신설 공사중 기존 지하철 터널구간의 구조적 안정성 검토)

  • Kong, Byung-Seung;Kim, Min-Ho
    • Proceedings of the KSR Conference
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    • 2007.05a
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    • pp.1752-1759
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    • 2007
  • In the new Seoul-Busan high speed railroad construction specially city center passage roadbed establishment is recommended the staibility for the existing subway tunnel segments of Busan subway line No. 1 and No.2. regarding the appearance condition, a quality condition and the durability of the objective facility site exact inspection, and it evaluates the numerical analysis which uses MIDAS GTS it leads and there is the objective of the place where the stability of the objective facility and this tunnel it investigates. To immediacy of the on-the-spot inspection result whole facility it is a condition where the reinforcement which is simple not to be hindrance is necessary, 2nd Line case it is a condition which transfer is good but the general defect and the damage which occur from the tunnel of NATM type were confirmed part. While roadbed establishment constructing that the continuous maintenance is necessary, it is judged. The result of 1st, 2nd Line maximum sinkage, unequal sinkage and the lining stress of numerical analysis are within permission and the damage degree is appearing with the fact that the degree it will can disregard it is slight. But it enforces necessary Pre-grouting in order to minimize an actual tunnel face conduct and when the tunnel is excavated it is judged with the fact that necessary to minimize the outflow possibility.

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Assessment of Degree and Safety Inspection Based on Maintenance Level in Domestic Youth Training Facility (국내 청소년시설 대상 유지관리기반 안전점검 및 안전성 평가 연구)

  • Lee, Jeong-Seok
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.24 no.3
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    • pp.1-8
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    • 2020
  • Recent the number, size and accident on Youth Training Facility have increased annually. Also, the discussion and interest relation to safety and maintenance of youth culture and education. This study asserts the necessity and importance of present condition and characteristic based on Youth Training Facility in domestic. Therefore, Results of this study, it is appeared that very vulnerable to improve safety and maintenance in them. Accordingly, The purpose of this study is to investigate the current status for the whole youth facilities. second it estimate on main damage and defect of them for the period four years.

Analysis of Performance Factors of Unmanned Aircraft System(UAS)-based Facility Management using Causal Loop Diagram (Causal Loop Diagram을 활용한 무인항공체계 기반 시설물 관리 영향인자 분석)

  • Kwon, Jin-Hyeok;Yu, Chae-Youn;Kim, Sungjin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2022.04a
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    • pp.85-86
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    • 2022
  • Traditionally, the facility inspection was visually conducted by the managers, and consequently the result can be subjective because of different perspective and experience of them. To solve this problem, the studies on this topic has tried to integrate the UAS. However, it is still concerned to use in practice due to the lack of analysis of the performance factors affecting the UAS-based facility condition inspection. Hence, the purpose of this study is to identify the critical factors as well as their correlations by modeling causal loop diagram (CLD). A total of 20 variables were derived in four categorized groups, and the relationships were analyzed. Further study will develop a system dynamics (SD) model to simulate various scenarios based on stock-flow diagram through the defined relationships in this study.

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A Study on the Trolley Sliding Condition Inspection System

  • Chang, ChinYoung;Kim, ChanSam;Jung, NoGeon;Na, YeonIl;Kim, YangSu
    • International Journal of Internet, Broadcasting and Communication
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    • v.7 no.2
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    • pp.109-112
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    • 2015
  • The Korean electric railway is growing rapidly such as speed of 300km/h in high speed section and 230km/h in the conventional railway section. But, power supply failure occurs because of loss of contact, defective catenary system and high speed vehicle. Therefore preventive maintenance way based reliability has been applied. Typical example is the facility inspection method using trolley inspection system. But it is required differentiated inspection method to prevent problem such as inspection errors. In this paper, a study on the trolley sliding condition inspection system using monitoring techniques is performed for performance enhancement of inspection system. It proposed the efficient maintenance method through monitoring the deviation and height of contact wire after installing inspection system on the top of train which operates in the metropolitan area. Inspection errors were decreased by virtually monitoring the video of faulty facilities. Also those facilities were identified through the impact sound analysis and tests at the main catenary section.

Case Study of Safety Management at Small Industry Handling Hazardous Chemicals (유해화학물 취급 중소기업 시설 관리실태 현황 및 개선방안)

  • Song, Eunhee;Lee, Donghoon;Cho, Youngho;Kwak, Dongho;Park, Kyoshik
    • Journal of the Korean Institute of Gas
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    • v.21 no.4
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    • pp.21-29
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    • 2017
  • Small and medium industry facility handling hazardous chemicals was inspected and summarized. The inspection results were summarized in four categories such as hazards to process, storage, workers, and the others. The result was applied to further improvement of the facility. In conclusion, the industry intented to satisfy minimum requirement of regulation and they do not pay attention to keep maintaining the facility in integrity condition.

A report on the preparation of signaling equipment procedures for the periodic inspection (신호설비 정기검사 절차서 작성에 대한 보고)

  • Ko, Yang-Ok;Seo, Moon-Seog
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.623-629
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    • 2008
  • A periodic inspection for facilities in operation is an inspection that is carried out regularly, in which inspection cycles are drawn up, and it is a series of tests to determine if the condition of all the equipment is maintained, and to identify whether they are to be used or replaced. Reliability should be enhanced, without a breakdown, by preliminary inspection and regular checks for each equipment item installed for equipment maintenance. It was noticed that there was a slight difference for the same facility, and for each organization in terms of inspection cycles and methods while preparing procedures of periodic inspection checklist, inspection methods and cycles for a related organization. Therefore, this paper reviews the optimal methods of inspection procedures for Seoul Metro.

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Establishing Unmanned Aircraft System(UAS)-based Facility Condition Monitoring Process through Benchmarking Analysis (벤치마킹 분석을 통한 무인항공시스템 기반 시설물 상태 모니터링 프로세스 수립 연구)

  • Kwon, Jin-Hyeok;Kim, Sungjin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2022.11a
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    • pp.101-102
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    • 2022
  • The current facility condition monitoring has disadvantages such as a slow inspection cycle, a risk of human casualties, and the need for a lot of time and money as the size of the structure is larger, because human access is required with limited use. Drones can reduce the risk of human casualties due to their good accessibility, and can compensate for the shortcomings of the current method by enabling monitoring on a wide scale. The goal of this study is to provide the current domestic monitoring process through benchmarking according to the recent research case of the US Department of Transportation (DOT) to suggest a process suitable for the domestic situation and the direction of future improvement measures.

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