• Archives of design research
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• v.16 no.4
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• pp.277-288
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• 2003

By the needs for design, the leading construction equipment manufacturers have performed the product design newly setting up the design teams of late, but the actual level of designing is just as much as copying without systematic process, Therefore the various studies are needed to set up the differentiated design method targeted only for construction equipment and solving the current problems. In this paper, 1 am going to suggest a basic material as well as a cornerstone predicting future design trend in the construction equipment design field through the study of design transition.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.41 no.4
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• pp.441-447
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• 2021

Construction sites are complex and dangerous because heavy equipment and workers perform various operations simultaneously within limited working areas. Solitary works of heavy equipment in complex job sites can cause fatal accidents, and thus they should interact with spotters and obtain information about surrounding environments during operations. Recently, many computer vision technologies have been developed to automatically monitor construction equipment and detect their interactions with other resources. However, previous methods did not take into account the interactions between equipment and spotters, which is crucial for identifying solitary works of heavy equipment. To address the drawback, this research develops a computer vision-based solitary work detection model that considers interactive operations between heavy equipment and spotters. To validate the proposed model, the research team performed experiments using image data collected from actual construction sites. The results showed that the model was able to detect workers and equipment with 83.4 % accuracy, classify workers and spotters with 84.2 % accuracy, and analyze the equipment-to-spotter interactions with 95.1 % accuracy. The findings of this study can be used to automate manual operation monitoring of heavy equipment and reduce the time and costs required for on-site safety management.

• Korean Journal of Construction Engineering and Management
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• v.17 no.3
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• pp.143-155
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• 2016

Recently, the interest on applying AVM(Around View Monitoring) systems in construction equipments have been increasing due to the demand for better control, work efficiency and safety. Most of the existing AVM systems have been developed focusing on the application in automobiles and only several AVM systems have been developed for construction equipments. However, the original technology of AVM remained the same as in the automobiles that failed to consider the main properties of construction equipments and suggest appropriate range of AVM display (Top-view). Therefore, the purpose of this study is to suggest a pilot type of AVM system for construction equipment. Accordingly, literature review, deduction of main consideration factors, selection of sensors, system design, algorithm development of a pilot type of AVM system for construction equipment have been conducted. A laboratory experiment has also been conducted for the deduction of further improvements. As a result, a minimum image refresh rate of 20 fps has been achieved that clearly reflects the actual situation of the equipment and also, the actual motions of Boom, Arm, Bucket have been displayed appropriately on the AVM system based on the angle data collected by sensors. However, the experiment results have also shown that the following tasks still remain for future work: 1)Improvement of AVM image interpolation, 2)Development of calibration module for variety construction equipment.

• Proceedings of the Korea Society of Design Studies Conference
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• 1999.05a
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• pp.76-77
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• 1999

대중적 건설중장비로서의 유압굴삭기는 1990년대 이후로 탈산업화(post-industrialization)의 영향을 받아, 형태나 색채에 있어서 변화를 시작한다. 이는 일반 소비재 분야에 비하여 다소 늦은 편이라 할 수 있다. 그 이유는 건설중장비 특성상 제한된 사용 충과 사용환경으로 인한 제품개발기간(PDT)과 제품수명주기(PLC)가 길고, 제품개발 비용이 상대적으로 거대하기 때문이다.(중략)

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.4D
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• pp.357-366
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• 2012

Construction equipment has applied to depreciation over the years, however, the price index for construction equipment is not properly reflected in existing quantity per unit and the local tax law. Thus, this study shows the analysis of the corporate tax law, the local tax law and business accounting standards, characteristics of the domestic depreciation system and depreciation methods, and the capital recovery factor of construction equipment applying the theory for economic efficiency. It also presents cases of depreciation on the basis of quantity per unit and tax law using straight-line depreciation method and declining balance method. It is proposed that the relations of the application system of permissible period for construction equipment and the existing system be explained and the application system of permissible period for construction equipment be imposed. Furthermore, it proposes the development of depreciation tables of construction equipment monthly expenses based on the domestic price index and applications. In addition of that, it proposes the analysis of pros and cons of the methods suggested and application limits of the study and subsequent improvement plans. This study should reflect more rational and objective reality in quantity per unit and tax law.

• Proceedings of the KIPE Conference
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• 2018.07a
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• pp.360-361
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• 2018

현재 건설 중장비에는 암전류에 의한 배터리 방전 문제가 발생하고 있고 이에 태양광 충전 시스템을 필요로 한다. 본 논문에서는 6톤급 중장비에 적용 가능한 태양광 컨버터 개발에 대한 내용을 다루며 태양전지의 용량 선정, MPPT 적합성 검토, 독립형 충전 시스템 구현, 배터리 방전 방지 기능의 실효성을 확인한다. PSIM 시뮬레이션을 통해 MPPT 및 충전 로직을 검증하고 실험을 통해 40W급 충전 시스템의 P&O 알고리즘 성능을 확인한다.

• Proceedings of the Korea Society of Design Studies Conference
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• 1998.04a
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• pp.63-65
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• 1998

• Journal of Drive and Control
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• v.7 no.2
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• pp.2-11
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• 2010

• Proceedings of the Korean Reliability Society Conference
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• 2006.05a
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• pp.263-271
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• 2006

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2013.04a
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• pp.509-513
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• 2013

There are so many types of construction equipment. Excavator is one of typical construction equipment which is working under the tough and severe environments. It's important for engineers to design CE components by the vibration durability point of view. Traditionally, two typical vibration durability methods to verify the durability of components. The first is experimental method which is using the vibration durability test bench. But experimental approach on vibration durability is needed a lot of cost and time. The second is analytical method which is using the vibration durability analysis such as Dirlik, Stainberg, Lalanne and others methodologies. The one of main advantages on vibration durability analysis can reduce the cost and time. We present a vibration durability analysis process and methodology on the guardrail system in excavator.