• 월간산업보건
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• s.270
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• pp.70-70
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• 2010

산업안전보건법 제43조에 따라 건강진단기관이 작성하여 사업주에게 제공하는 건강진단결과표 중 사후관리소견서(2면)에 기재되는 내용이 근로자의 개인정보에 해당되기 때문에 이를 기재하는 행위는 개인정보보호 관련법령에 위반된다는 일부 주장에 대하여 고용노동부가 개인정보보호관련 법률을 담당하는 행정안전부에 당해 사항의 법령 위반여부에 대한 유권해석을 질의한 바, 산업안전보건법에 의한 사후관리소견서상에 개인정보를 기재하는 것과 이상소견이 있는 지에 대한 검진결과 수치를 기재하는 것 모두 개인정보보호 관련법령에 위반하지 않는다는 내용이 회신되어 이를 안내하오니 업무에 참고하시기 바랍니다.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.11 no.3
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• pp.104-109
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• 2012

Recently, the deburring process which is last process of manufacture is one of the important process for complete product. The manual deburring process can cause not only higher error rate but also irregular shape and quality of product. Therefore, Shape Guided Automatic Deburring Machine has been developed to resolve the above problems. But the Shape Guided Automatic Deburring Machine have been applied only to produce a circular product. Therefore, this machine is difficult to apply to products of various shapes. To solve this problem, we would like to develop Generalized Shape Guided Automatic Deburring Machine applicable to various shapes. To this end, we have done the modeling and design using CATIA program and have performed machine simulation.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.1003-1005
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• 2022

코로나-19의 여파와 기술의 발전으로 비대면 거래가 증가하고 있는 추세다. 비대면 거래가 증가하면서 무인점포도 늘어나고 있고, 늘어남에 따라서 시각장애인들은 무인점포를 이용하는데 어려움을 겪고 있다. 본 논문에서는 자율주행 로봇에 음성인식 기술과 딥러닝 기술을 적용하여 시각장애인에게 도움을 줄 수 있도록 ICT융합 로봇을 구현하였다. 무인점포 뿐만이 아니라 안내가 필요한 다양한 장소에서도 적용될 수 있을 것으로 기대한다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.1A
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• pp.45-52
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• 2010

This study pointed on the dynamic impact of AGT (Automated Guide-way Transit) bridge, due to concrete rail prominence. An experiment was done with 30 m P.S.C. bridge in AGT test line in Kyungsan. An artificial prominence with 10 mm hight, was installed at the mid span of concrete rail. And computer simulation was executed for the artificial prominence. As an experiment result, in the case of with prominence, bridge acceleration responses are increased 50% at the speed range of 20 km/h-60 km/h, and bridge displacement responses increased slightly. With these results, the prominence of concrete rail can be induce excess impact and vibration. And the computer program simulated much the same as experiments. So this program can be used for AGT bridge design and formulate the standard of concrete rail management.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.31 no.12
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• pp.1173-1179
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• 2007

In recent years, research to machine large-surface micro-features has become important because of the light guide panel of a large-scale liquid crystal display and the bipolar plate of a high-capacity proton exchange membrane fuel cell. In this study, in order to realize the systematic design technology and performance improvements of an ultra-precision machine for machining the large-surface micro-features, a structural characteristic analysis was performed using its virtual prototype. The prototype consisted of gantry-type frame, hydrostatic feed mechanisms, linear motors, brushless DC servo motor, counterbalance mechanism, and so on. The loop stiffness was estimated from the relative displacement between the tool post and C-axis table, which was caused by a cutting force. Especially, the causes of structural stiffness deterioration were identified through the structural deformation analysis of sub-models.

• Journal of the Korean Society for Precision Engineering
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• v.19 no.5
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• pp.139-148
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• 2002

Motion errors of linear motion guideway are analyzed theoretically in this paper. For the analysis, an new algorithm predicting motion errors of bearing and guideway is proposed using the Hertz's elastic deformation theory. Accuracy averaging effect can be calculated quantitatively by analyzing relationship between motion errors of guideway and spatial frequency of rail form error. Influences of design parameters on the motion errors including the number of balls, preload, ball diameter, bearing length and the number of bearings are analyzed. As it is difficult to measure the rail form error, experimental results are compared with results analyzed by the equivalent analysis method which evaluate the motion errors of guideway using the measured errors of bearing. From the experimental results, it is confirmed that the proposed analysis method it effective lo analyze the motion errors of linear motion bearing and guideway.

• Journal of Aerospace System Engineering
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• v.10 no.4
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• pp.11-16
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• 2016

In this paper, an experimental study on the aerodynamic characteristics of a variable span wing flying inside a channel guideway is accomplished using wind tunnel testing. A variable span wing with a NACA 0012 airfoil section was fabricated and actuated using a linear servo motor. The aerodynamic effects of 1) wing aspect ratio, 2) ground effect, and 3) the gap between the wingtip and the wing fence were investigated. It was found that both ground effect and wing fence gap increased lift. Also, the wing fence gap does not significantly affect drag. Therefore, it was found that a variable span mechanism can be used as an effective high lift device when flap use is limited.

• Vending industry
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• v.11 no.1
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• pp.64-65
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• 2012

얼마전 한국자동판매기공협협회(이하:협회)에서는 유니세프에 국내 자판기 운영업체들이 어떻게 하면 기부관련 협약 체결을 할 수 있는지를 물었다. 취지를 요약하자면 "자판기 모금을 통해 착한 일을 해보고 싶어 하는 곳이 많다. 유니세프에 수익금의 일부를 기부하는 것에 관심을 갖는 곳이 있는데 어떻게 하면 참여를 할 수 있는가? 협회 차원에서 그 방법을 안내하고 싶다"는 내용이었다. 반응은 의외였다. 별로 자판기 업계가 유니세프 기부에 참여하는 것을 반기지 않았다. 좋은 일에 기부하고자 하는 선의를 무시하는 것 같아 꼬치꼬치 이유를 물었다. 유니세프 관계자는 "자판기 운영자와 협약을 맺으면 '이 자판기 수익금 중 일부(%)는 유니세프를 통해 불우한 지구촌 어린이들에게 지원됩니다'라는 문구를 사용하게 된다"고 밝히며 "그런데 그동안 기부에 참여 한다고 해놓고 문구만 사용하고 기부금은 입금하지 않는 업체가 많았다"고 말했다. 문제는 그렇게 해도 유니세프가 일일이 단속 할 수 없는 현실이라는 점. 그렇기 때문에 솔직히 자판기 운영업체가 참여를 한다고 해도 못 미더운 심정이라고 밝혔다. 아울러 이 관계자는 "협회를 통해 많은 업체가 참여할 경우 자판기를 통한 기부확산이라는 점은 긍정적이지만 염려되는 면이 있는 것이 사실이다"면서 "솔직히 협회차원에서 나서서 협약 안내를 하지 않았으면 한다"입장을 밝혔다. 부아가 치밀었지만 현실이 잘못되어 있는 점은 어쩔 수 없는 일이다. 유니세프 쪽에서 자판기 분야의 참여업체가 선례가 오죽 좋지 않았으면 그런 입장을 표명했을까?

• Transactions of the Korean Society of Mechanical Engineers A
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• v.28 no.7
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• pp.896-903
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• 2004

This paper proposes the structural characteristic analysis and evaluation on the hydrostatic guide way and feeding system of a high-precision centerless grinder for machining ferrules. In order to realize the required accuracy of ferrules with sub-micron order, the axial stiffness and motion accuracy of feeding system have to become higher level than those of existing centerless grinders. Under these points of view, the physical prototype of feeding system composed of steel bed, hydrostatic guide way and ballscrew feeding mechanism is designed and manufactured for trial. Experimental results show that the axial and vertical stiffnesses of the physical prototype are very low as compared with those design values. In this paper, to reveal the cause of these stiffness difference, the structural deformations on the virtual prototype of feeding system are analyzed based on the finite element method under experimental conditions. The simulated results illustrate that the deformation of front ballscrew support-bearing bracket is the main cause of reduction in the axial stiffness of feeding system, and the deflection of bed structure and the bending deformation of hydrostatic guide rails are the main causes of reduction in the vertical stiffness of feeding system.

• Proceedings of the KSME Conference
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• 2004.04a
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• pp.1975-1980
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• 2004

The three-dimensional flow in a turbine nozzle guide vane passage causes large secondary loss through the passage and increased heat transfer on the blade surface. In order to reduce or control these secondary flows, a linear cascade with a contoured endwall configuration was used and changes in the three-dimensional flow field were analyzed and discussed. Measurements of secondary flow velocity and total pressure loss within the passage have been performed by means of five-hole probes. The investigation was carried out at fixed exit Reynolds number of $4.0{\times}10^5$. The objective of this study is to document the development of the three-dimensional flow in a turbine nozzle guide vane cascade with modified endwall. The results show that the development of passage vortex and cross flow in the cascade composed of one flat and one contoured endwalls are affected by the flow acceleration which occurs in contoured endwall side. The overall loss is reduced near the flat endwall rather than contoured endwall.