• Korean Journal of Construction Engineering and Management
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• v.23 no.4
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• pp.65-77
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• 2022

Schedule management is one of pivotal project success factors during construction projects. However, there are many difficulties in rapid scheduling and controlling since the existing planning techniques require considerable amount of manual work and manager's judgment in a construction project. This research aims to propose a new scheduling method and algorithm for automating and visualizing the planning process, which is called Countable-grid scheduling method. In this method, if the scope of work is defined via a visualized tool, the schedule plan is created automatically according to the productivity and workable conditions of each activity. The location of the work for each date can be visualized in grid-based approach. Moreover, the work schedule can be updated automatically according to the progress. The industrial applicability of the proposed method was verified in construction projects via case study with sample data. This research can contribute to the construction industry by automating the construction schedule management process.

• 기계와재료
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• v.22 no.4
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• pp.76-83
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• 2010

로봇의 발전 동향을 살펴보면, 기존의 위치 기반제어를 통하여 단순반복 재생 하는 로봇에서 인간과 로봇이 협력할 수 있는 로봇으로 그리고 궁극적으로는 독자적인 작업지능을 갖고서 독립적으로 운용되거나 인간과 공존할 수 있는 로봇으로 개발되어 나아갈 것으로 예상된다. 다만 현재까지의 로봇 기술로는 로봇 독자적으로 완전한 작업지능을 구현하기가 힘들기 때문에 그 중간 단계로써 사람과의 협력 작업을 구현하고 하는 것이다. 이처럼 인간-로봇 협업 기술은 인간의 지능과 로봇의 성능을 결합하여 고도의 작업을 구현할 수 있는 기술로써 로봇의 사용법을 모르는 현장 작업자도 로봇의 말단부를 잡고 손쉽게 로봇에 명령을 지시할 수 있다. 따라서 로봇의 응용 범위가 매우 다양해지고, 특히 로봇 전문인력이 없고 다품종 변량 생산을 주로 하는 중소기업에서의 로봇 활용을 촉진시켜 작업 환경 개선과 생산성 향상이 가능해진다. 또한 제조업용 로봇 분야에서 뿐만 아니라 범용성이 강한 기술로 개인서비스 로봇에서부터 국방, 건설, 의료 등 전문 서비스 로봇에 이르기 까지 폭넓게 적용될 수 있다. 이러한 인간-로봇 협업을 위해 필요한 기술들로는 경량형 로봇팔 기술, 인간-로봇 협조 제어 기술, 인간-로봇 안전 기술, 작업자 편이를 위한 인터페이스 기술 등이 포함되며 향후 기술의 발전에 따라 그 파급효과가 극대화될 것으로 기대된다.

• Korean Journal of Construction Engineering and Management
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• v.7 no.5
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• pp.149-158
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• 2006

Current removing process is labor intensive and time consuming, employing a conventional grinding type manual machine. This manual tasks trigger various dangers such as unexpected traffic accidents or explosions of propane gas used for finalizing removing process, leading to health damage and environment pollution by dusts and noxious gases. Accordingly, it is necessity for the development of new alternative equipment. In this paper, we have developed a prototype equipment for road stripe removing made up with a high-pressure water-jet system as a mobile type system. The following shows the results. First, an analysis of the current road stripe removal process showed that it can be divided into a) preparation, b) removal and c) ground finishing. It also showed that the b) removal process requires equipment which can cover the whole process. Second, the study compared between the productivity of the developed equipment and conventional methods, and it obtained 280% productivity improvement compared to the conventional equipment.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.8
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• pp.3660-3669
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• 2011

Demands for systemized management of workers' safety systemically in construction sites have been increased. Industrial accidents at work places are often happened by risk factors of construction sites, and also it brings a lot of loss as the correct direction for workers about locations to work is not delivered properly. In this paper, a safety supervision system for construction sites is designed and implemented to figure out the location of workers accurately and to provide the information about the status of works and workers in real-time by personal device which is based on RFID. The system designed in this paper achieved high performance in its function and efficiency through a performance test, compared with existing analogous systems.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.4D
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• pp.433-442
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• 2010

Recent decrease in the availability of experienced skilled labor and a corresponding lack of new entrants has required the need for automating many of the construction equipment used in the construction industry. In particular, excavators are widely used throughout earthwork operations and automating its tasks enables work to be performed with higher productivity and safety. This paper introduces an optimal path generation method which is one of the core technologies required to make "Intelligent" excavators a reality. The method divides a given earthwork area into unit cells, identifies networks created by linking these cells, and identifies the optimal path an excavator should follow to minimize its total transportation costs. In addition, the method also accounts for drainage direction and path continuity to ensure that the generated path considers site specific conditions.

• 월간 기계설비
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• s.57
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• pp.39-47
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• 1995

건설산업은 한정된 공간에 많은 인력과 장비가 동시에 투입될 뿐만 아니라 대부분의 작업이 고층 또는 지하 등 취약한 장소에서 이루어지고 있어 사망 등 증대재해가 빈발하여 막대한 인명피해와 경제적 손실이 발생하고 있다. 지난해 건설재해로 인한 사망자수는 11월말까지 총 산재사망자 2천3백18명중 6백22명으로 나타나 건설업은 제조업과 함께 산재다발산업으로 인식되고 있으며, 특히 전문건설은 건설현장의 최일선에서 재해위험에 전면노출되어 있는 점을 감안할 때 보다 많은 시간과 경비를 투자하여 반복교육을 실시함으로써 근로자 스스로가 안전수칙을 준수하고 게을리 하지 않도록 유도해 나가야 하겠다.

• Tunnel and Underground Space
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• v.32 no.5
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• pp.298-311
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• 2022

Some problems, such as aging workers, a decreased population due to a low birth rate, and shortage of skilled workers, are rising in construction sites. Therefore research for smart construction technology that can be improved for productivity, safety, and quality has been recently developed with government support by replacing traditional construction technology with advanced digital technology. In particular, the motor grader that mainly performs road surface flattening is a construction machine that requires the application of automation technology for repetitive construction. It is predicted that the construction period will be shortened if the construction automation technology such as trajectory tracking, automation work, and remote control technology is applied. In this study, we introduce the hardware and software architecture of the smart motor grader to apply unmanned and automation technology and then analyze the traditional earthwork method of the motor grader. We suggested the application plans for the path pattern and blade control method of the smart motor grader based on this. In addition, we verified the performance of waypoint-based path-following depending on scenarios and the blade control's performance through tests.

• Journal of the Korean Association of Geographic Information Studies
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• v.12 no.4
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• pp.48-58
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• 2009

In recent years, construction worker safety in construction site is important. Especially, the frequent collapse accidents have happened in tunnels, utility tunnel and underground structure, so that the importance of worker safety is greatly emphasized. It is difficult to communicate with other workers in underground space, using the current cable or wireless communicator. When the accident is occurred, it can't rescue workers. This is the reason that it has a deficiency to find a location of survivor and communicate rescure crew and field workers. In this paper we extract the optimal technical factors of USFSS(Underground Structure Field Support System) based on integrated technique of wireless communication and location awareness. And USFSS developed in this study is suited for bad environment of underground structure construction and able to track 3D position of laborer and communicate mutually.

• Journal of the Korea Institute of Building Construction
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• v.15 no.6
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• pp.621-629
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• 2015

Construction worker safety and safety training continue to be main issues in the construction industry. In order to promote safety awareness among workers, it is imperative to develop a more effective and efficient safety training. This study compared two methods in construction worker safety training: 1) a conventional lecture and 2) 3D simulation through Building Information Modeling. Both training methods included the same contents, a selection of safety standard and guide suggested by Occupational Safety and Health Agency and the Korea Occupational Safety and Health Agency; the contents were then produced into two types of training methods. A survey was conducted targeting on safety managers, in which the managers evaluated lifelikeness, active learning and enjoyment that each of training methods can promote. The results of the survey showed that innovative method using 3D simulation was more effective than conventional lecture method in terms of its lifelikeness, active learning and enjoyment. This study will provide implications that innovative method using the virtual reality is more effective than conventional lecture method.

• Journal of the Institute of Convergence Signal Processing
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• v.20 no.2
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• pp.91-98
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• 2019

Accidents of worker that occur in isolated places are difficult to rescue, unlike general construction accidents. There is a problem of communication limitation when an accident occurs in an isolated place. Also, it is difficult to search the accident place due to the absence of CCTV. In order to solve these problems, this paper proposes a device that combines IoT technology with a safety helmet, which must be worn in the workplace. The proposed device additionally designs and implements a real-time PPG(Photoplethysmography) sensor, body temperature sensor, accelerometer sensor and a camera sensor on the helmet. The proposed helmet system allows the user and the control center to monitor the state of the worker. In addition, when an abnormal biological signal or fall occurs to the worker, the image is transmitted to the control center. By using the proposed system, it is possible to check the status of the worker in real time, so that it has an advantage that it can cope with the accident quickly.