• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• 2006.11a
• /
• pp.669-673
• /
• 2006

Field works are decreasing gradually since advancement of industrial robots. Tunnel cleaning is a dangerous field work which can be solved only by introducingadvanced tunnel cleaning automation equipment. Industrial robots work tirelessly night and day without a loss in performance. Consequently, greatly reduce the costs of manufactured goods.So far only 200 construction robots are invented. Robots used for tunnel cleaning are not of high standard they always need additional workers for job to be done. Robots offer specific benefits to workers, industries and countries. If introduced correctly for tunnel cleaning, industrial robots can improve the quality of life by freeing workers from dirty, boring, dangerous and heavy labor. Development of advanced tunnel cleaning automation equipment is a must to overcome above issues. The benefits of robots to industry include improved management control, productivity and consistently high quality products. This research is a study on tunnel cleaning automation equipment and introducing advanced tunnel cleaning automation equipment.

• Proceedings of the KIPE Conference
• /
• 2014.11a
• /
• pp.129-130
• /
• 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.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.21 no.12
• /
• pp.612-618
• /
• 2020

In recent years, the demand for external window cleaning has increased, but the process is a very dangerous manpower-dependent operation. In addition, it is difficult to clean at the desired frequency in a business that values cleanliness. Therefore, there is a need to automate this work. This paper presents the concept of a device that can be attached to a specific window and clean the window continuously. The economic feasibility of this device was analyzed. The estimated manufacturing cost of the equipment was approximately 10 million won, but the possible investment cost was at least 9.8 million won for five years of endurance and 103 million won for 10 years of endurance. Therefore, the expected savings well exceed the equipment cost, and it was evaluated as having economic feasibility. Since this study analyzed only quantitative indicators, the expected cost reduction due to a reduction in safety accidents, productivity improvement, construction time reduction, and quality improvement was not considered. Therefore, it is expected that the calculated economic feasibility will be more accurate if the cost reduction effect by the automation equipment is calculated by adding the expected values not considered in this study.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2013.10a
• /
• pp.911-913
• /
• 2013

In this paper, we present the sweeping machine with cyclone type dust collector for cleaning shipment exterior wall. Important cyclone characteristics such as the collection efficiency, pressure and velocity fields have been discussed and compared with the experimental data. The purpose of this study is to introduce the mechanism design of the high efficiency sweeping machine using the cyclone dust collector. Generally, the increase of inlet velocity of air in a cyclone dust collector improves the separation efficiency, while it results in increasing in the pressure losses nonlinearly.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2010.07a
• /
• pp.293-296
• /
• 2010

현재 지능형 서비스로봇이 활성화되고 있으며 지능형 로봇 분야에서 청소로봇은 개인생활의 본질적인 운동성을 보조하며 인간과 공생의 형태를 지원하는 로봇으로 성장하고 있다. 청소로봇은 가정에서 다양한 서비스를 제공하기 위하여 가정환경과 적절한 상호작용은 필수적이다. 따라서 로봇이 외부의 서버와 협동을 통한 원격제어는 필수적이라 할 수 있다. 현재 지도 작성이 가능한 청소로봇은 바닥에 센서를 부착하거나 작업환경에 카메라 및 기타 많은 장치를 구축하므로 고가의 장비로 분류되어 일반적으로 활용지 못하고 있다. 본 연구에서는 청소로봇의 효율적인 제어를 위하여 작업환경에서 로봇의 궤적과 센서정보를 원격으로 서버에 전달하고 서버는 이러한 정보를 바탕으로 지도를 작성하고 최적의 작업을 수행할 수 있는 알고리즘을 연산하여 로봇에 전달할 수 있는 방법을 연구하였다. 이는 로봇이 지도 작성을 위한 연산 과정을 줄이므로 수행 시간을 단축하고 로봇에 주어지는 부하를 줄일 수 있다. 또한 원격으로 제어를 수행하므로 무선통신이 가능한 각종 디바이스와 상호 연동할 수 있는 체계를 만들어 유비쿼터스 환경을 구축할 수 있는 계기를 만들므로 청소로봇의 성능이 향상될 수 있음을 보인다. 본 연구에서는 청소로봇을 제작하고 시뮬레이션과 실험을 통하여 전체적으로 주어진 작업을 효율적으로 수행할 수 있음을 보여준다.

• Journal of the Korea Society of Computer and Information
• /
• v.27 no.11
• /
• pp.115-121
• /
• 2022

In surface mount technology (SMT), the screen printer, which is an equipment for applying solder cream, has a lot of poor coating as the pad becomes smaller. To solve this problem, a jet printer is being used recently. However, if the nozzle at the end of the valve applied to the jet printer head is not cleaned, solder cream remains or an error occurs. To prevent this, the nozzles should be cleaned periodically. In this paper, a more stable cleaning method than the existing technology is presented for the stable application of solder cream on a jet printer. In this method, cut a 35mm wide mujin cloth, wrap it in a roll, and rotate it with a DC geared motor on the other side to clean it. As a result, it was confirmed that the solder paste was not left on the nozzle surface and was well wiped when cleaning with about 2,000 dotting cycles.

• Proceedings of the Korean Information Science Society Conference
• /
• 2008.06d
• /
• pp.424-427
• /
• 2008

최근 산업용 로봇에서부터 청소 로봇과 지능형 서비스 로봇에 이르기까지 주행 기능을 갖고 있지만, 제한된 상황에서의 단순한 주행 기능이 거의 대부분이다. 로봇이 복잡한 환경에서 자율 주행 하기 위해서는 로봇의 위치인식이 되어야 가능하다. 지금까지 많은 기술들이 나와 있지만 비교적 고가의 장비로 구현되어야 한다는 단점을 가지고 있다. 따라서 본 논문에서는 IEEE 802.15.4a 기반에 CSS (Chirp Spread Spectrum) 방식의 RTLS를 로봇 위치추적에 사용함으로 낮은 가격에 로봇의 위치 추적이 가능한 방법을 제안한다. 이를 위해 RTLS 모듈을 제작하였고, 로봇의 위치제어에 사용하였다. RTLS를 적용한 로봇은 비용적인 측면에서 비교적 낮은 가격에 로봇의 현재 위치를 얻을 수 있는 장점을 가지며, 충돌감지 센서와 같은 센서를 통해 간편하게 지도를 작성할 수 있다는 장점이 있다. 또 앞으로 여러 대의 로봇을 동시에 사용하는 환경에서도 각각의 로봇이 위치를 인식하기 위해 드는 비용을 줄임으로 실제 저가의 로봇에 적용 가능할 것이다.

• Product Safety
• /
• s.246
• /
• pp.44-47
• /
• 2014

(주)대신전기산업은 인천광역시 남동구 간석동에 위치한 주방기구 전문제조업체로써 최신형 NCT 등 장비를 보유하고 자외선 살균소독기를 비롯하여 전기식소독고, 전기온장고, 전기튀김기, 칼도마소독기, 피자오븐, 장화건조기, 핫바, 식판 및 접시건조기, 장갑소독기, 우|생복건조기, 행주건조기, 수저소독고, 청소도구함 등을 생산 판매하고 있으며 제약회사와 음료회사에 쌍화탕 등 건강음료 보관 온장고를 납품하여 좋은 반응을 얻고 있다. 또한, 전 품목을 소비자가 원하는 대로 주문생산도 가능하며, 소비자의 불편을 최대한 해소하기 위하여 부산, 대구, 광주, 제주에 지사 겸 대리점을 두어 A/S를 신속히 처리하기 위해 노력하고 있다. 이번 제품안전 6월호에서는 전 직원이 한 마음으로 품질개발과 신제품개발에 노력을 다하여 주방의 위생과 환경 개선에 최선을 다하고 있는 (주)대신전기산업을 방문해 보았다.

• The Journal of Engineering Geology
• /
• v.24 no.2
• /
• pp.283-295
• /
• 2014

Groundwater monitoring wells are important to maintain their performance for long term monitoring. The monitoring wells with extensive internal incrustation by clay adsorption were selected for this study. The performance of these monitoring wells was improved by pump washing, tube replacements for dedicated samplers, and well surging. After each improvement, the Mg, Mn, and Zn concentrations were increased. The results show that under these conditions, the monitoring wells must be carefully inspected at least once a year. Even in the case of no abnormal phenomenon like as internal incrustation, the monitoring wells need to be serviced at least once every four to five years to guarantee that they are effectively monitoring groundwater quality.

• Journal of Nutrition and Health
• /
• v.56 no.5
• /
• pp.554-572
• /
• 2023

Purpose: The purpose of the study was to analyze the priorities for educational content regarding precautions to be taken to prevent safety accidents for employees in school foodservice using the Borich priority formula and the Locus for Focus model. Methods: A survey was conducted in February 2019 on 194 employees in elementary school and 122 employees in middle- and high school foodservice in the Jeonbuk area. Demographic characteristics, status of safety accidents, safety education, and their importance and performance levels were assessed using a self-administered questionnaire. The priorities for the educational content on precautions to prevent safety accidents were based on a 3-step analysis method, including the paired sample t-test, Borich priority formula, and the Locus for Focus Model. Results: The average perceived importance of the precautions to be taken against safety accidents of employees in elementary-, middle-, and high schools was higher compared to the average performance of the employees (p < 0.001). The top priority for elementary school employees was caution against falls during the cleaning of the gas hood and the trench in the kitchen. In addition, 'awareness of chemical signs' was added as one of the top priorities of middle- and high school employees. The second highest priority items were 'do stretching', 'safely adjusting workbench height', 'keeping the right attitude', 'using assistive devices when moving heavy things', and 'checking the material safety data sheet', which were the same for all elementary, middle- and high school employees. Conclusion: Thus, to improve the educational preparedness of employees in the area of safety precautions, eight safety/accident prevention items should be included in the safety education program.