• 한국정밀공학회지
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• 제31권4호
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• pp.297-301
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• 2014

The biggest factors, which lower the machining accuracy of machine, are thermal deformation and chatter vibration. In this article, we introduce the development case of a device and technology that can automatically compensate thermal deformation errors of machine during long-time processing on the machine tool's CNC (Computerized Numerical Controller) in real time. In machine processing, the data acquisition of temperature signal in real time and auto-compensation of the machine origin of machine tools depending on thermal deformation have significant influence on improving the machining accuracy and the rate of operation. Thus, we attempts to introduce the related contents of the development we have made in this article : The development of a device that embedded the acquisition part of temperature data, linear regression to get compensation value, compensation model of neural network and a system that compensates the machine origin of machine tool automatically during manufacturing process on the CNC.

• 한국산업융합학회 논문집
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• 제6권4호
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• pp.413-420
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• 2003

We can take 'Profit security', in the field Process improvement activity and man-power upgrade in the learning of organization activity or upgrading ability of each peoples. After Tayler System(Scientific Management in1911) and Ford System(Conveyor system in 1913), Toyota System(Ohno's TPS; Toyota Production System around 1980) which was developed by Toyota in Japan in the third productive revolution. This thesis study on the focus of 2 successful examples(P and S companies in Seong-Seo industrial complex Tae-Gu city) which introduce Toyota system can apply to VM(Visual Management), 3jeong(Right Products Right Quantity, Right Box and Right Position)5S(Seiri, Seiton, Seisoh Seiketsu, Sitsuke), JIT(Just In Time), KAIZEN(Improvement), KANBAN System(Logistic) and output of Factory. For examples P company obtained a lot of results(productivity increase 19%, Quality up 46%-36ppm, storage decrease 25% per year), S company obtained a lot of results(productivity increase 20%, Quality up 40%, storage decrease 33% per year, 2600 improvements in 2002. In conclusion Korean KANBAN system (modified Toyota System) is similar to exchange of work as Korean traditional system in agriculture as like dure 'PUMASHI' SANGBU-SANJO) that's autonomous management systems. In conclusion Korea KANBAN system needs apply to not only all the manufacturing industry but also the various fields of industry.

• 농촌계획
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• 제10권2호
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• pp.1-6
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• 2004

This study tried to construct a direction in regional planning concerning the structural relationship between the ratio of aged population and the industrial characteristics. We investigated this structural relationship incorporating the aged population index and the number of classified companies. We applied diverse statistical analyses to understand the relationship. We classified the number of companies to reflect regional industrial characteristics using the principal component analysis. We applied a multiple regression model to understand the relationship between these two indices. The aged population index represents the degree of being old divided by the ratio of juvenile population and aged population. We found that such industries as manufacturing, service, and conveyance increase the ratio of juvenile population. However, industries such as tourism, waterworks, forestry, agriculture and etc. have a positive effect on the aged population index. In addition to these findings, we believe that the efficacy of this study is the possibility that can be used as the basic data when central or local autonomous entities need to adopt rural development planning.

• Journal of Astronomy and Space Sciences
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• 제17권2호
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• pp.211-220
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• 2000

Korea Astronomy Observatory(KAO) is working to retrofit its 1m robotic telescope in collaboration with a company (ACE, Astronomical Consultants & Equipment). The telescope system is being totally refurbished to make a fully automatic telescope which can operate in both interactive and fully autonomous robotic modes. Progress has been made in design and manufacturing of the telescope mount, mechanics, and optical performance system tests are being made for re-configured primary and secondary mirrors. The optical system is designed to collect 80% incident light within 0.5 arcsec with f/7.5 Ritchey-Chretien design. The telescope mount is an equatorial fork with a friction drive system. The design allows fully programmable tracking speeds with typical range of 15 arcsec/sec with accuracy of $\pm5$ arcsec/hour. The mount system has integral pointing model software to correct for refraction, and all mechanical errors and misalignments. The pointing model will permit positioning to better than 30 arcsec RMS within $75^{\circ}$ from zenith and 45 arcsec RMS elsewhere on the sky. The software is designed for interactive, remote and robotic modes of operation. In interactive and remote mode the user can manually enter coordinates or retrieve them from a computer file. In robotic mode the telescope controller downloads the coordinates in the order determined by the scheduler. The telescope will be equipped with a CCD camera and will be accessible via the internet.

• 한국정밀공학회지
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• 제28권4호
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• pp.436-445
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• 2011

As automation systems become intelligent and autonomous for productibility, industrial networks (fieldbuses) and network-based devices are essential components of intelligent manufacturing systems. However, there are obstacles for the wide acceptance of the network-based devices such as smart sensor and network-based actuator. First, there exist numerous fieldbus protocols that a network-based device should be able to support. Second, the whole network-based device has to be replaced when only the sensor of the module fails. In order to overcome these obstacles, a smart sensor/actuator is implemented as two units; one responsible for network communication and the other for sensor/actuator operations using IEEE 1451.0 standard. This paper presents a structure of the 1451.0-based smart sensor with multiple connectivity function designed by CANopen.

• 대한기계학회논문집A
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• 제41권6호
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• pp.533-541
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• 2017

최근 컴퓨터 및 통신기술의 적극적인 결합에 따른 생산 시스템의 자동화 및 지능화가 급속하게 진행됨에 따라, 자동화 시스템의 핵심 요소 중 하나인 스마트 센서를 내장한 필드 장치들의 수도 급격하게 증가하고 있으며 이들을 통합 관리할 필요성도 높아지고 있다. 본 논문에서는 엔코더의 위치 데이터 센싱 기능과 CANopen 프로토콜을 결합한 스마트 엔코더 구조를 제안하고, 복수 개의 엔코더를 CAN 네트워크를 통해 동시에 관리, 모니터링할 수 있는 시스템 구조를 설계, 구현하였다. 구현한 시스템의 성능과 기능적 동작은 상용 엔코더와의 비교 실험과 CANopen 호환성 테스트를 이용하여 검증하였다.

• 한국IT서비스학회:학술대회논문집
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• 한국IT서비스학회 2008년도 추계학술대회
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• pp.543-546
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• 2008

국내 50인 이상, 매출 100억이상 규모의 중소제조업을 위한 생산정보화는 그간 정부의 정보화 지원사업의 지원으로 중소제조업에서 평균 생산성 22%이상의 성과를 달성하였다. 그러나, 50인이하, 매출 100억 미만의 국내제조업은 약 20만개 이상이 되고 있으나, 정부에서 지원하고 있는 정보화지원사업의 혜택을 받지 못하고 있다. 그간 ERP, SCM 등과 같은 기업정보화의 경우 ASP (Application Service Provider)모델을 개발하여 적용을 시도하여 보았으나 활성화되지 못했고 생산자원 4M (Man, Machine Material & Method)정보를 실시간 처리가 요구되는 생산정보화의 경우에는 기술적 문제로 인하여 적용 시도조차 할 수 없었다. 최근 RFID/USN, 개방형 임베디드, 모바일, 차세대 인터넷 및 SOA (Service Oriented Architecture)기술의 급속한 발전으로 전세계 산재되어 있는 복수 공장의 생산자원을 중앙에서 서비스기반으로 중앙관리가 가능하게 되었다. 본 논문에서는 50인 이하, 매출 100억 미만의 군소제조업의 생산자원 4M을 유무선 센서 기술을 통하여 자율 재구성 능력 (Autonomous Reconfigurable) 기반의 원격관리가 가능한 핵심기능의 소개와 복수 공장의 다양한 생산정보화 애플리케이션을 단일 표준 플랫폼으로 구현할 수 있는 적용 모델에 대하여 설명한다.

• Restorative Dentistry and Endodontics
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• 제45권2호
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• pp.15.1-15.7
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• 2020

This clinical report describes designing and fabricating a single-retainer resin-bonded fixed dental prosthesis with a chair-side computer-aided design/computer-aided manufacturing system. The whole procedure, from tooth extraction to final placement of the prosthesis, was completed in one day, and a single clinic visit. No clinical complications were found at the 2-year follow-up after placement of the restoration, and satisfactory functional and esthetic results were achieved.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 추계학술대회
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• pp.254-255
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• 2016

현대 과학 기술이 발전함에 따라 인간은 편리함을 추구하게 되었고 사람이 기계를 제어 하지 않는 그런 시대가 도래 했다. 이러한 무인 이동체는 자동차, 항공, 선박 등 다양한 곳에서 사용되고 있고 또한 연구되고 있다. 그러나 무인 이동체는 중요한 장점이자 단점이 사람이 제어하지 않는 것이고, 이는 무인 이동체가 주행 중에 장애물과 충돌을 할 가능성이 높다는 것을 의미했다. 이 시스템에서는 퍼지 제어, 영상 기반 인식, 센서 인식을 통해 충돌 회피 시스템을 만들 것이며, 이 논문을 통해 충돌 회피에 있어 더 나아진 효과를 기대 한다.

• 전자통신동향분석
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• 제36권3호
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• pp.12-22
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• 2021

Since the technical realization of self-aligned planar complementary metal-oxide-semiconductor field-effect transistors in 1960s, semiconductor manufacturing has aggressively pursued scaling that fruitfully resulted in tremendous advancement in device performances and realization of features sizes smaller than 10 nm. Due to many intrinsic material and technical obstacles, continuing the scaling progress of semiconductor devices has become increasingly arduous. As an effort to circumvent the areal limit, stacking devices in a three-dimensional fashion has been suggested. This approach is commonly called monolithic three-dimensional (M3D) integration. In this work, we examined technical issues that need to be addressed and overcome to fully realize energy efficiency, short latency and cost competency. Full-fledged M3D technologies are expected to contribute to various new fields of artificial intelligence, autonomous gadgets and unknowns, which are to be discovered.