• Journal of the Korea institute for structural maintenance and inspection
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• v.24 no.1
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• pp.74-79
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• 2020

Safety inspection of cable-supported bridge has increasingly attention as many cable-supported bridges are currently constructed/operated. Whilst cables as a main component in cable-supported bridge should be inspected regularly, traditional method (visual inspection) has limitation to check the condition of cables properly due to restricted factors. It is evidently necessary to develop cable-inspection robot to overcome this concern. In this respect, the main aim in this study is to manufacture the improved robot compared with the existing robot. The improved functions of the robot in this study were that the robot can be operated in large cable diameter (greater than 200 mm) and climbing ability of the robot increases. In addition, electro-magnetic sensor as a non-destructive method in the robot was added to detect damaged cables and performance of the sensor was evaluated in indoor and field experiments. Consequently, the robot was able to move on the cable with ~0.2m/s and to detect damaged cables using the sensor. It was also confirmed that performance of the robot in field test is similar to that in indoor test.

• The Journal of the Convergence on Culture Technology
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• v.6 no.2
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• pp.55-70
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• 2020

This study aims to identify the influence of risk-inducing factors and safety inspection on the measures of reducing accidents among workers of building structures in small construction sites. The result can be summarized as follows: First, as for the influence of risk-inducing factors on human factors, preparation for work, disintegrating molds, taking follow-up measures, and keeping records, have statistically significant influences. Therefore, it can be said that safety inspection has a partial mediating effect in the relationship between risk-inducing factors and human factors. Second, as for the influence of risk-inducing factors on facility factors, preparation for work, and taking follow-up measures influenced significantly. This indicates that safety inspection has a partial mediating effect in the relationship between risk-inducing factors and facility factors. Third, as for the influence of risk-inducing factors on management factors, the installation of shores and risk assessment are found to have significant effects. This shows that safety inspection has a partial mediating effect in the relationship between risk-inducing factors and management factors. Fourth, the influence of risk-inducing factors on work factors was significant only in the installation of shores. This indicates that safety inspection has a completely mediating effect in the relationship between risk-inducing factors and work factors. Finally, in the relationship between risk-inducing factors and accident reduction measures, preparation for work, installation of shores, and taking follow-up measures showed significantly positive influences. In contrast, keeping records has a significant negative influence. Thus, safety inspection has a partial mediating effect in the relationship between risk-inducing factors and management factors.

• Korean Journal of Construction Engineering and Management
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• v.17 no.1
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• pp.110-118
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• 2016

Construction projects are getting more complex and larger-sized with a high economic growth rate and development of new construction technologies. In addition, interests and demands on standards of construction quality are further increasing. This trend requires more systematic and a higher level of construction quality management. While the government has strengthened the regulations for quality assurance, many quality problems have repeatedly occurred mainly due to lack of recognition for quality management and quality control systems. To address this issue, this paper aims to suggest quality management improvement scheme through analyzing 3,443 nonconforming items identified during inspection of 393 construction sites from March 2012 to October 2014. The quality management improvement scheme suggested in this research is expected to prevent quality problems and defects and thus improve construction performances.

• 한국IT서비스학회:학술대회논문집
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• 2010.05a
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• pp.452-457
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• 2010

정보시스템 운영은 연속성, 장애에 대한 민감성 등 정보시스템 구축과는 다른 특성을 많이 가지고 있어 감리방법에 있어서도 새로운 방법이 필요하다. 본 논문은 정량화된 운영점검표를 제시함으로써, 운영감리의 객관성과 신뢰성을 확보하고, 감리결과를 정량화하며, 타 운영사례나 과거 운영 상태와의 비교를 가능케 하여, 감리의 품질과 운영감리의 효용성 향상에 기여하고자 하였다. 시스템 운영 정보시스템 감리지침의 기본점검항목을 기준으로 13가지 기본점검항목을 도출하였고, 각 기본점검항목 별로 현재 운영상태가 어떤 수준인지를 평가할 수 있도록 하였으며, 전문가 인터뷰와 현장적용을 통하여 검증하였다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.559-564
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• 2003

Recently, quality inspection and A/S management have been considered as one of the major issues for satisfying customers, increasing competitiveness and raising image of a company in domestic construction industry. However, the qualify inspection and A/S management have not performed systematically because of insufficient field managers, the excessive amount of documents and complicated work process. The primary objective of this study is to propose a quality inspection and A/S management system using information technology which enables field managers to efficiently gather the information of defection and A/S in apartment house. It is anticipated that the effective use of the proposed system would be able to improve communication among the related participants and systematically accumulate data that might be used in similar construction projects.

• KEPCO Journal on Electric Power and Energy
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• v.4 no.2
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• pp.115-123
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• 2018

Various types of robots running on power transmission lines have been developed for the purpose of line patrol monitoring. They usually have complex mechanism to run and avoid obstacles on the power line, but nevertheless did not show satisfactory performance for going over the obstacles. Moreover, they were so heavy that they could not be easily installed on the lines. To compensate these problems, flying robots have been developed and recently, multi-copter drones with flight stability have been used in the electric power industry. The drones could be remotely controlled by human operators to monitor power distribution lines. In the case of transmission line patrol, however, transmission towers are huge and their spans are very long, and thus, it is very difficult for the pilot to control the patrol drones with the naked eye from a long distance away. This means that the risk of a drone crash onto electric power facilities always resides. In addition, there exists another danger of electromagnetic interference with the drones on autopilot waypoint tracking under ultra-high voltage environments. This paper presents a patrol monitoring plan of autopilot drones for power transmission lines and its field tests. First, the magnetic field effect on an autopilot patrol drone is investigated. Then, how to build the flight path to avoid the magnetic interference is proposed and our autopilot drone system is introduced. Finally, the effectiveness of the proposed patrol plan is confirmed through its field test results in the 154 kV, 345 kV and 765 kV transmission lines in Chungcheongnam-do.

• Korean Journal of Construction Engineering and Management
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• v.6 no.5 s.27
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• pp.148-156
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• 2005

By reviewing the existing researches of construction safety management, this study presented some problems; 1) preceding researches dealt only a formal system of safety management and did not focus on the practical safety management action, 2) there is an insufficient endeavor of utilizing the lessons teamed of successful construction sites and generalizing the success factors of safety management in the construction industry. The objective of this study is to propose and describe an effective construction safety management activity improvement reflecting success factors of the excellent construction cases and the preceding researches. To achieve this objective, the authors performed a case study of successful construction sites and proposed the major six safety activities. The author's point are illustrated through an explanation of the safety management activity improvement.

• The Safety technology
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• no.93
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• pp.20-25
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• 2005

• The Safety technology
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• no.89
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• pp.20-25
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• 2005

• The Safety technology
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• no.77
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• pp.64-67
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• 2004