• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.353-354
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• 2006

The automatic inspection system is developed for the formed end part of automotive fuel pipe. The developed system has functions of outer diameter and formed end length measurement by LVDT(linear variable differential transformer) together with burr cleaning of automotive fuel pipe. The measured data are managed and controlled in real time by embedded SPC(statistical process control) program. The system is composed of mechanical part, electronic part and developed software system. These three parts operate automatically by mutual communication with each other. The developed system showed good results in finding inferior goods and efficiency improvement of the fuel pipe production line. It also eliminated the unreliable manual inspection processes and improved the confidence of product quality.

• 상하수도학회지
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• 제30권6호
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• pp.725-736
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• 2016

There is a growing concern on the improvement of water distribution pipeline for multi-regional water supply system in Korea along with its aging infrastructure. Rehabilitation of large diameter pipeline is more efficient in cost and time compared to replacement with trenching. The procedure for rehabilitation are diagnosis, cleaning, spraying coating material, and final inspection. The internal state of pipeline was carefully diagnosed and got C grade, which required rehabilitation. We found that 17,274,787,000 Korean won could be saved after pipe surface coating because of increased C coefficient of Hazen-Williams equation. Optimal coating material was D polyurea. We also found optimal distance between spraying nozzle and pipe wall to be 70 - 80 cm, which were critical factors for coating quality. This study also illustrated the time for spray drying to be more than 30 min. These results could be used in the quality control process during rehabilitation of aged pipelines.

• 한국기계가공학회지
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• 제14권5호
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• pp.1-7
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• 2015

Cleaning by injecting dry ice and water is a generally adopted trend these days to clean molds (injection, diecasting foundry, press, rubber mold, etc). This cleaning method is performed manually, or by installing multiple high pressure spray nozzles. We have manufactured a turbine cleaning module device that is able to clean diecasting modules at any position and angle in the space by mounting an articulated robot instead of the existing pipe type injection nozzle, to minimize lead time and enhance working yield of the cleaning process. In this paper, we analyzed process factors that are required to design the turbine module by reviewing number of revolution, and results according to different blade angles and thicknesses of the mold release injection turbine module, using computational fiuid dynamics (CFD).

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.1173-1178
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• 2007

The robot for narrow space is used in searching, investigating or cleaning. Up to now variety of researches on in-pipe robots have been introduced. However it is still hard to overcome vertical or curved passage. In most cases of narrow space robots are able to travel just aimed diameter which was selected when those are developed. Also, a large percentage of robots are not able to detect the configuration of pipe or circumstance. In this paper we present a robot called PAROYSⅡ for narrow space with vertical and curved passage. This proposed robot is not affected at all to variance of pipes, vertical or horizontal passages, curved pipes, projecting parts and parallel planes. In addition to that, it will perceive the internal configuration of pipe and terrain, which will be not only available to control navigating scheme by itself, but also mappable about the passage which the robot traveled. Core points in the design and structure are introduced and preliminary verification is given.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2014년도 추계학술대회 논문집
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• pp.129-130
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• 2014

본 논문은 배관 청소에 최적화된 PWMC 기반 청소로봇 개발을 제안한다. 제안하는 배관 청소로봇은 최적화된 배관 청소 환경을 제공하기 위하여 배관 요소를 분석하여 이에 따른 모터, 조인트, 솔, 스프링 등을 설계하였다. 설계를 통하여 개발된 청소로봇은 조정에 따라 지름 200~300mm의 좁은 배관에서 PWMC 를 통하여 속도를 제어하여 자동 청소가 가능하다. 또한 개발된 청소로봇은 6.8kg로 기존 배관 청소 기계를 50%이상 경량화 하여 휴대성과 간편한 조작에 따른 편의성을 제공하며, 기존의 장비에 대한 소모성을 낮추고 무게의 경량화 및 동작 자동화에 초점을 두었다.

• 한국반도체및디스플레이장비학회:학술대회논문집
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• 한국반도체및디스플레이장비학회 2007년도 춘계학술대회
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• pp.128-131
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• 2007

As the minimum feature size decrease, control of contamination by nanoparticles is getting more attention in semiconductor process. Cleaning technology which removes nanoparticles is essential to increase yield. A reference wafer on which particles with known size and number are deposited is needed to evaluate the cleaning process. We simulated particle trajectories in the chamber by using FLUENT. Charged monodisperse particles are generated using scanning mobility particle sizer (SMPS) and deposited on the wafer by electrostatic force. The experimental results agreed with the simulation results well. We calculate the particles loss in pipe flow theoretically and compare with the experimental results.

• 한국생산제조학회지
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• 제20권1호
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• pp.13-16
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• 2011

It is a tendency where the number of the restaurant is increasing recently with advancement of the food service industry. In comparison, Noxiousness fine MIST and the removal are passively done in about offensive odor which occurs meat products processing as emitting like that in the atmosphere. Because adherence lamination in the exhaustion line pipe has need of a periodic cleaning and change, it must discontinue the business of long time. In this paper, The technique development on fine MIST, dust of offensive odor and filtering which occur meat products processing prevents adherence/lamination of fine MIST in exhaustion line pipe. And the source prevents the environmental matter which is emitted in the atmosphere under maximizing boil offensive odor and the filtering effect of noxiousness MIST.

• 한국수자원학회논문집
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• 제32권4호
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• pp.469-478
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• 1999

한수관내 침전물의 퇴적을 방지하기 위하여는 최저유속과 에너지경사, 관경을 산정하여 제시하여야 되는데 이들 수치를 바로 결정하는 양해법 산정식들을 개발하였다. 이를 위하여 토사의 임계전단력과 상용관 마찰계수 산정을 위하여 지수형 산정식들을 도입하였으며, 이들 지수형 산정식들은 기존 실험관측자료를 이용하여 개발되었다. 제시된 수치들의 적합성을 판별하기 위하여 여러 예들을 본 연구에서 개발된 산정식들을 적용하여 검토하였다.

• 설비공학논문집
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• 제19권11호
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• pp.789-796
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• 2007

It has been noted, in case of the apartments in collective form, the drainage noise from cleaning of toilet causes many problems in the basement and adjacent rooms, mainly hampering the pleasant housing environment. The problems are increasingly raised by civil complaints with the public offices. Therefore, if the drainage noise generates when wash out of toilet bowl is grasped how the characteristics change according to the sorts of drainpipe, it is considered that the establishment of an effective sound insulation countermeasure could be possible when a civil petition against the drainage noise of apartment house is submitted hereafter. On such viewpoint, this study measured and analyzed the characteristics of drainage noise per the type of drainage pipe, according to KS A ISO $1996-1{\sim}3$, with the horizontal branch pipe and riser pipes in the drainage noise experiment chamber which has the characteristics of the anechoic room. In the result, the pipe type with excellent noise reduction function. The result of this study is considered to become available as fundamental data, to take actions on reduction of drainage noise of the ceiling piping method.

• 월간 기계설비
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• 9호통권194호
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• pp.87-88
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• 2006

최근 삶의 질이 향상됨에 따라 쾌적한 환경 추구와 WellBeing 문제가 사회 이슈로 부각되면서 생산라인 및 위생배관에 대한 관심이 높아지고 있다. 그 중에서도 특히 우리가 먹고 마시는 공기와 물은 물론 냉난방과 각종 액체, 가스 통신선 등이 전달되는 통로인 Pipeline 속의 청결은 인체의 건강에 직접적인 영향을 미치므로 더욱 세심한 주의가 요구되고 있다. 조은 시스템은 최근 생산라인 및 건축물 배관 등의 파이프라인을 신개념으로 클리닝하는 시스템을 한국에 도입시켜 파이프클리닝에 새로운 바람이 불 것으로 예상 된다.