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양진호(Jinho Yang),손유호(Yoo Ho Son),이동건(Donggun Lee),노상도(Sang Do Noh),김현남(Hyeonnam Kim),이종수(Jong Su Lee),김영수(Young Soo Kim),원영규(Youngkyu Won) 대한산업공학회 2021 대한산업공학회지 Vol.47 No.1
With the advent of the 4th industrial revolution, manufacturing companies are facing unpredictable market changes such as sharp fluctuations in product demand and frequent launches of new products. In order to respond to this changes, order-based manufacturing companies are striving to make the manufacturing system reconfigurable and flexible. Traditional manufacturing systems are required to replace main equipment and reorganize production lines when a new product is to be released, and it incurs cost and time to produce the dedicated tools for new products. Therefore, it is necessary to fabricate a flexible jig tool that can be quickly reconfigured to cope with various products in different shapes. In this paper, as a part of constructing a reconfigurable and flexible assembly of smart factory, the flexible jig which can be applied universally to the production of various vehicle door trims in different shapes is proposed. Also, on a trial basis, it is applied to the reconfigurable and flexible assembly lines of smart factory for verifying the responsiveness of the reconfigurable jig tools to product changes.
운행 경유자동차의 입자개수(PN) 검사 타당성 검토에 관한 연구
양진호(Jinho Yang),조현우(Hyunwoo Jo),김현준(Hyunjun Kim),여운석(Unseok Yeo),이호상(Hosang Lee),이효열(Hyoyeol Lee),류익희(Ikhui Ryu) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
Ultrafine particles emitted from diesel vehicles contain heavy metals and hazardous chemicals, causing diseases such as stroke, which is more harmful to the human body. For this reason, PN regulations were introduced for vehicle sold after 2012. However, current smoke tests measuring opacity cannot be PN measured, and even if DPF is removed or damaged as diesel engines improve, it is difficult to detect defects through smoke tests. To solve this problem, we tried to examine the feasibility of PN inspection of a in used diesel vehicle. A defective DPF was installed in a vehicle with a normal DPF. And the PN, diagnostics, and the smoke concentration were measured and compared. As a result, no DPF defects could be found in the smoke test and OBD test. However, in the PN inspection, DPF defects were confirmed. Therefore, it is necessary to introduce PN inspection in Korea to detect DPF defects early and regulate ultrafine particles.
운행 휘발유 자동차 배출가스 검사방법 개선에 관한 연구
양진호(Jinho Yang),여운석(Unseok Yeo),조현우(Hyunwoo Jo),김현준(Hyunjun Kim),이호상(Hosang Lee) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
As interest in the environment increased, a law was established to diagnose emission-related parts and turn on MIL when defects are found, and applied to automobiles sold in California after 1988. However, there was a need for technology development to detect these devices because they generate a lot of emissions when they malfunction. Through this study, we wanted to examine whether OBD inspection is possible in-used vehicles. A test was conducted to analyze the correlation between the OBD test and the exhaust pipe test. A defect in OBD does not necessarily result in high emissions, but it has been shown that more emissions are generated on average. Therefore, it was confirmed that vehicles with a high possibility of generating exhaust gases can be selected through OBD inspection. OBD inspection can detect failures before exhaust gas-related parts are completely damaged, so it is necessary to introduce OBD inspection into vehicle inspection in order to detect early failure of emission-related parts.
A Nickel Nanowire Diluter Operating through the Principle of the Dielectrophoretic Attraction Force
양진호(Jinho Yang),윤현중(Hyeun Joong Yoon),양의혁(Eui-Hyeok Yang),양상식(Sang Sik Yang) 대한전기학회 2010 전기학회논문지 Vol.59 No.2
This paper presents a microfabricated nanowire diluter which dilutes the concentration of nanowires in solution instead of by the conventional centrifuge process. The device has 16 pairs of gold electrodes in a micro channel composed of a glass substrate and PDMS. We prepared nickel nanowires by the template-directed electrodeposition method using nanoporous anodized aluminum template (AAO). We injected the Dimethylformamide (DMF) solution containing nanowires into the inlet of the diluter while applying square wave voltages on the electrodes to trap the nanowires at the subsequent gold electrodes by means of dielectrophoretic attraction forces. The concentration of nanowires at the outlet of the micro channel was changed as we expected, which illustrates that the device can effectively dilute nanowires and can be applied to a controlled assembly of nanowires.
스마트시티에서 활용 가능한 LoRa기반 화재 대피 경로 안내 시스템
염진호(Jinho Yeom),조성우(Seongwoo Jo),양서린(Seorin Yang),김경백(Kyungbaek Kim) 한국정보과학회 2021 한국정보과학회 학술발표논문집 Vol.2021 No.6
최근 국내에서 스마트시티 조성이 활성화됨에 따라 이에 적합한 LoRa 통신을 중심으로 연구를 진행하였다. 본 논문에서는 현재 사용 중인 수동형 대피체계의 한계를 보완하고자 화재 상황에 따른 방향 지시 서비스를 구현하였다. 저전력 장거리 통신이 가능한 LoRa 모듈을 이용해 통신망을 구축하였다. 화재 발생 시 CSI 카메라 모듈을 이용한 YOLO 객체 탐지와 온습도 센서를 통해 건물 내부의 혼잡도와 상황을 파악한다. 이러한 데이터를 바탕으로 총 대피시간을 단축시킬 수 있는 대피알고리즘에 적용해 최적의 대피 경로를 안내하는 화재 대피 경로 안내 시스템 개발을 제안한다.