• 한국산업융합학회 논문집
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• 제6권4호
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• pp.299-305
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• 2003

This research is for the relationship with heat treatment cooling temprature and the characteristic of Mechanical properties of Boron-Addition-Steel, the main material and SM25C steel, the sub material, structure viewing fractography, hardness test, tensite test and are carried out after the manufacturing small-specimen treated with heat of $750^{\circ}C$, $850^{\circ}C$, $1050^{\circ}C$. The influence to the Mechanical properties accompanied by AISI51B20, Boron-Addition-steel shows the following result. 1. The influenc of heat treatment by the content of cabon-steel is dominant. Addition of boron result is Strengthening structure effectively by segregation and improving over all mechanical characters such as good. it results from the increase of temacity by the stability of inter granular with improvement of harden-ability. 2. Boron-Addition-Steel exist in the from of martensite structure accompanied by the ferrite precipitition centering around grain boundary, and is improved to Hv 200. 3. The height of harden-ability and fatigue stress the influence of heat results from crystal structure of martensite by difference of strength level in the structure of ferrite and doesn't have am effect on sensibility of temperature, and turns out to defend on production and growth of Matrix-structure-factor.

• 실천공학교육논문지
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• 제6권1호
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• pp.9-14
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• 2014

본 연구에서는 실천 공학적 적용의 하나의 사례연구를 소개하고자 한다. 연구 주제는 약품 공급기이고, 이 장치는 PLC, DC 모터, 스위치, 포토 센서 등으로 구성 된다. 이 기기의 설계 및 제작을 위하여 대학에서 재학 기간 동안 학습한 많은 교과 내용들을 직접 실습하고 구성한다. 특히, 하드웨어와 소프트웨어의 모든 부분을 직접 구성해 봄으로써 단순히 내부 프로세스만이 아니라 자판기의 기계적 메커니즘까지 이해해 볼 수 있도록 한다. 기업의 다른 자판기 제품보다 공급 완성도를 높이기 위하여 사용자 맞춤 공급이나 정확한 카운팅 등 추가 아이디어를 제안한다. 일상 생활에서 편리하게 사용되어질 수 있는 약품 공급기를 간단하게 나마 실제로 구현해 봄으로써 학생들은 창의력과 적응성을 키울 수 있을 뿐만 아니라, 이 연구를 통하여 습득한 기술들이 필요 시에 관련 산업에 적용되어질 수 있다.

• 한국산업융합학회 논문집
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• 제13권4호
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• pp.211-217
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• 2010

As the vehicle components are various, we confront unexpected problems in the development and application of them. also warranty expenses occur in the result of unconfirmed warranty.in this paper, to solve the problems of disconnection of damper Strut cable, we applied the optimum conditions through taguchi method for improvement of durability. and we made standard of reliability by weibull analysis of the field data. we acquired reliability standard by correlation with lab data and confirmed improved components satisfying the target of reliability. The analysis of reliability by field data is very useful and we need to apply this method to other components, the correlation between field data and Lab Test has influence on satisfying the target of reliability.this method would be utilized for current mass production components and upcoming developed components. the reliability of durability should be continuously used in the basis of primary technique in cope with competitive automotive companies.

• 한국산업융합학회 논문집
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• 제17권4호
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• pp.227-233
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• 2014

Information presented in this study is intended to inform candidates as they prepare to design and structure the floatovoltaics solar power system. A developed floatovoltaics solar power generation results from the combination of PV plant technology and PV floating technology. This floating-based PV system is a new concept for PV development. The PV floating technology opens new opportunities to give value to unused areas so far while preserving valuable land for more adapted activities. Therefore the land-use conflicts are avoided and the environmental impact is minimized. Therefore the technology offers an interesting opportunity to regions facing on drought during summer time without any negative impact to the eco-system. This study describe the basic components of a floatovoltaics solar power system. A typical system consist of floating system and solar modules, a control device, rechargeable batteries, a load or device and the associated electrical connections. The floating system is specifically designed to keep all metallic components above water leaving only 100% recyclable, closed cell foam filled HDPE plastic floats in contact with the water. As the first case that can maximize the power generation efficiency of PV internationally, it is expected that this study will be utilized as a primary guide for future development of floating type PV system.

• 한국산업융합학회 논문집
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• 제22권4호
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• pp.427-433
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• 2019

This paper propose a fuzzy inference model for map building and navigation for a mobile robot with an active camera, which is intelligently navigating to the goal location in unknown environments using sensor fusion, based on situational command using an active camera sensor. Active cameras provide a mobile robot with the capability to estimate and track feature images over a hallway field of view. In this paper, instead of using "physical sensor fusion" method which generates the trajectory of a robot based upon the environment model and sensory data. Command fusion method is used to govern the robot navigation. The navigation strategy is based on the combination of fuzzy rules tuned for both goal-approach and obstacle-avoidance. To identify the environments, a command fusion technique is introduced, where the sensory data of active camera sensor for navigation experiments are fused into the identification process. Navigation performance improves on that achieved using fuzzy inference alone and shows significant advantages over command fusion techniques. Experimental evidences are provided, demonstrating that the proposed method can be reliably used over a wide range of relative positions between the active camera and the feature images.

• 한국산업융합학회 논문집
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• 제22권1호
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• pp.39-45
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• 2019

We propose an active color model based method for tracking motions of multiple human using a networked multiple-camera system in IoT space as a human-robot coexistent system. An IoT space is a space where many intelligent devices, such as computers and sensors(color CCD cameras for example), are distributed. Human beings can be a part of IoT space as well. One of the main goals of IoT space is to assist humans and to do different services for them. In order to be capable of doing that, IoT space must be able to do different human related tasks. One of them is to identify and track multiple objects seamlessly. In the environment where many camera modules are distributed on network, it is important to identify object in order to track it, because different cameras may be needed as object moves throughout the space and IoT space should determine the appropriate one. This paper describes appearance based unknown object tracking with the distributed vision system in IoT space. First, we discuss how object color information is obtained and how the color appearance based model is constructed from this data. Then, we discuss the global color model based on the local color information. The process of learning within global model and the experimental results are also presented.

• 한국가스학회지
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• 제17권6호
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• pp.52-57
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• 2013

본 연구에서는 안전모 쉘 구조물의 정상부에 돌출부를 설치한 경우와 설치하지 않은 경우에 대해, 안전모의 두께와 하중면적을 변수로 변형률 에너지 밀도, 응력, 변위거동을 유한요소법으로 해석하였다. 변형률 에너지 밀도는 안전모로 전달되는 충격에너지 전달을 흡수하는 성능을 나타내는 변수로 안전모의 안전성을 고찰하는 중요한 요소 중의 하나이다. 유한요소 해석 결과에 의하면, 4,540N의 충격력이 안전모의 정상부 표면에 가해질 때 충격하중을 받는 하중면적이 증가할수록 최대응력은 선형적으로 줄어든다. 그러나, 최대 변형률 에너지 밀도는 하중면적이 증가할수록 커지는 것으로 나타났다. 변형률 에너지 밀도가 줄어들면, 안전모 착용자의 머리와 목 부분으로 전달되는 충격력은 줄어드는 것으로 나타났으며, 이것은 안전모의 충격에너지 흡수 안전성을 약화시키는 요인이 될 수 있다. 따라서, 안전모의 안전한 설계를 위해서는 정상부에 돌출 구조물을 설치하는 것이 좋지만, 이러한 수정 안전모는 충격에너지 흡수성능 측면에서는 불리함을 알 수 있다.

• 한국산학기술학회논문지
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• 제13권6호
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• pp.2472-2478
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• 2012

본 연구는 반도체 산업에서 반도체장비 유지보수에 사용되어지는 반도체장비 유지보수 분야의 전문기술인력을 효과적으로 양성할 수 있는 반도체장비 유지보수의 자격종목을 개발하고자 하는데 그 목적이 있다. 연구의 목적을 달성하기 위하여 반도체장비 유지보수 분야의 국내외 실태 조사, 문헌조사를 통하여 반도체장비 유지보수 관련 교육훈련기관 및 검정 수요 예상 인력을 파악했으며, 유사자격제도(전자부품장착기능사, 전자부품장착산업기사, 생산자동화기능사, 생산자동화산업기사)를 분석하였고, 직무분석을 통하여 반도체장비유지보수기능사의 직무 및 교육내용을 분석하였다. 또한 반도체장비 유지보수 자격종목 신설에 대한 설문조사를 실시했으며, 반도체장비유지보수기능사 자격종목의 출제기준 및 채점 방법을 제시했고, 필기시험과 실기시험에 대한 모의 검정시험도 실시하였다. 이러한 결과를 토대로 반도체장비유지보수기능사에 대한 교육프로그램을 만들었으며, 자격검정을 실시할 수 있는 출제기준을 제시하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1994년도 Proceedings of the Korea Automatic Control Conference, 9th (KACC) ; Taejeon, Korea; 17-20 Oct. 1994
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• pp.477-482
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• 1994

As the need for switchover to FA and for rationalization increases in the industrial world, educational courses in schools are more and more taking up the subjects of electronic machines, mechatronics and systems, etc., subjects which are a fusion of the previous subjects of electricity, electronics and machines. At our junior college, a control engineering course was inaugurated in 1974 prior to any other schools that offered such courses. As automation progressed, the use of industrial robots spread rapidly. The year of 1980 is regarded as the first year that the use of industrial robots become widespread. Responding to the current requests, a one-year research course was added to the control engineering course in 1983. Moreover, a robot engineering course was newly established in 1984, in which mechatronics and industrial robotics were instructed intensively in high efficiency. As a teaching aid, an air robot system which was based particularly on the FMS model and possessed pattern recognition capabilities was completed in 1982. This system has been used since then as the nucleus for hands-on training with robots and systems. As more and more intelligent machines and artificial intelligence become widespread in industry, these subjects are taking on greater importance and greater sophistication in the education offered by this department. Educational institutions are seeking to provide facilities and curricula which will meet the technological needs of this age. Our college is not an institution at the graduate school level, but rather a school which is at the more practical junior college level. An outline of the facilities introduced at our school is presented and the results of utilizing it in industrial robot engineering education is reported.

• 동의생리병리학회지
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• 제20권2호
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• pp.328-332
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• 2006

This study aims to provide definitions and standardization for necessities that elderly people can use conveniently and properly in their daily lives and classify necessities for different purposes. First, standard terminologies were defined by reviewing the literature and the relevant laws related to daily necessities for the elders. Secondly, a concept for necessities for the elders was also defined through consultation with experts. Lastly, the elderly's necessities were selected and classified. The elderly's necessities are defined as aids that ordinary elderly people in normal aging process need for the purpose of the convenience of life and aids they wear or use to maintain or improve their health. In this study, the elderly's necessities are divided into three categories: necessities of health, necessities of Oriental medical aids and necessities of daily living. Each category is further classified as follows: Necessities of health include aids for personal medical treatment, aids for personal care and protection and aids for recreation. Necessities of Oriental medical aids include aids for personal medical treatment, aids for personal care and protection and others. Necessities of daily living include aids for personal care and protection, aids for personal mobility, aids for housekeeping, furnishings, aids for communication, information and signalling, aids for handling products and goods and aids for recreation. The classification of the elderly's necessities in this study can be used as basic information for further studies of demand for necessities for the elderly. The results will lay the foundation for a standardization system for the elderly's necessities and the development of silver industry.