LED 융합조명의 자동화 조립 시스템에서 전자동 매거진 피더에 관한 구조해석과 동특성 분석

추세웅(Se-Woong Choo),정상화(Sang-Hwa Jeong) 한국기계가공학회 2018 한국기계가공학회지 Vol.17 No.1

In the general manual feeder of an LED lighting assembly system, many workers are needed to supply parts to the main conveyor. The automatic feeder for modern automation lighting assembly systems consists of a completely automated feeding system and a magazine system that supplies the parts automatically. A standardized LED panel and diffusion cover is stacked in the cartridge of the magazine system. The structural safety of the automatic feeding system with regard to handling the load from the panels and covers stored in the cartridge should be guaranteed. LED convergency lighting modules are assembled using two LED panels and one diffusion cover in an automatic feeder. In this study, the structural safety and fatigue life of the automatic feeder and magazine were analyzed by considering the load generated in the automatically assembled LED convergency lighting system. In addition, the dynamic behavior of each auto-feeding system and magazine delivery system was visualized, and the working process was evaluated via dynamic simulation using a virtual engineering method. A tack time table for automatic feeding systems was derived by developing a virtual prototype.

Automatic submerging and surfacing performances of model submersible fish cage system operated by air control

Kim, Tae Ho,Yang, Kyong Uk,Hwang, Kyu Serk,Jang, Duck Jong,Hur, Jung Gyu Elsevier 2011 Aquacultural engineering Vol.45 No.2

<P><B>Highlights</B></P><P>► We conducted model experiments on automatic submersible fish cage system by air control. ► The algorithm and program required to control the submersible fish cage system were developed. ► The cage was automatically submerged to the target water level and surfaced to the original location. ► The algorithm and controller was useful to the auto submerging and surfacing of the cage.</P> <P><B>Abstract</B></P><P>An automatic, submersible fish cage system using air control was developed and a set of model experiments were conducted to examine the automatic submerging characteristics of the cage. The components of the fish cage consist of a rigid frame assembly with 6 variable ballast tanks and 6 fixed ballast tanks. The variable ballast tanks were used to change the buoyancy characteristics of the system by air control so that the fish cage can either be placed at the surface or submerged. The cage is free to move vertically within a water column by adjusting the weight and the buoyancy with an air control system. The model of this system, with dimensions of 2.20m in diameter and length and 1.04m in net cage depth, was constructed to be 1/10 the size of the full-scale system. In the model experiments, the submerging and surfacing characteristics of the cage were regulated with measurements from a water-pressure gauge and a gyroscope incorporated into the automatic control system. Model tests were performed in a still water tank and a large wave tank to develop the algorithm required to control the cage system and to verify the ability of the automatic submersion mechanism to function. The control system was designed so that when the variable ballast tanks were flooded with water, the model descended. To raise the system, compressed air is injected into the tanks by opening the main evacuation valve on the manifold. After the required amount of compressed air is supplied, the main evacuation valves can be shut and as a result, the fish cage becomes buoyant. Measured performance results in a still water tank are then compared with calculations from a previously developed numerical technique. The submerging and surfacing characteristics of the fish cage were relatively similar to the measurements obtained with the physical model experiments using air control. The cage was submerged to a target depth when incidence wave heights were higher than the critical wave height and raised when little wave actions were detected in a wave tank. On the other hand, the cage was placed at the surface when incidence wave heights were the same as the critical wave height or lower.</P>

빌딩 자동제어 시스템의 무선화에 관한 연구

여동환(Dong Hwan Yeo),조형동(Hyoung Dong Jo) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6

The wireless communication system applied in the building automatic control system has been studied by reflecting the recent evolution of the automatic building control system from the wired system to the wireless system. The wired system applied in the existing building automatic control system is compared by the latest wireless system, and quantitatively analyzed the advantages gained by applying the wireless system with examples of actual field application. This wireless communication system will be able to contribute to the development of building automatic control systems that apply wireless systems in the future by analyzing the performance and stability of the wireless system and deriving the necessary items in the field.

무인교통단속장비 속도정확도 자동진단 시스템 개발

소형준 ( So Hyung-jun ),박길수 ( Park Kil-soo ) 한국도로교통공단 2014 교통안전연구 Vol.33 No.-

무인교통단속장비는 교통사고 감소 뿐만 아니라 교통법규 준수율 향상 등 교통안전에 미치는 영향력이 상당하며, 투자대비 사망자 감소와 교통사고 피해 감소 기여도가 큰 것으로 평가받고 있다. 이러한 무인교통단속장비의 기능과 성능이 안정적이고 정상적으로 발휘 되도록 하기 위해서는 지속적인 유지관리가 필요하다. 특히, 속도 정확도 신뢰성은 반드시 확보되어야 한다. 무인교통단속장비의 점검을 위한 다양한 방법들이 제시되고 있으나, 설치 여건 상 교량부, 고가도로, 중앙분리대 등에 설치되어 점검자의 접근이 어려우며 안전이 위협받고 있는 실정이다. 따라서, 본 연구에서는 루프검지기에서 발생하는 자기장과 주파수를 측정하여 루프검지기 상태를 파악 할 수 있는 센서를 개발하고, 차량에 탑재하여 주행 중 루프검지기 속도정확도를 점검할 수 있는 자동진단 시스템을 개발하였다. 또한, KOLAS 국가 공인검사기관에서 사용되는 검사장비와 비교검증을 실시하였다. 그 결과, 개발된 시스템은 실무에 효과적으로 적용될 수 있을 것으로 검토되었다. It is evaluated that the Automatic Traffic Enforcement System has considerable influence on the traffic safety including the increase of traffic rules’ observation rate as well as reduction of car accidents, and is significantly contributing in reducing the number of dead people and the damages resulting from car accidents comparing against the investment on the system. In order that such automatic traffic enforcement system’s function and performance can be worked stably and normally, the system requires the continual maintenance. Especially, the reliability on speed accuracy should absolutely be secured. In real, though there have been suggested various ways for checking such automatic traffic enforcement system, but an inspector is hard in approaching to such a system and his safety is endangered because the system is usually installed on a bridge, a high-level road or a central strip, and others because its installment conditions. Therefore this study measured the magnetic field and the frequency generated from a loop detector and developed a sensor to recognize the loop detector’s condition, and also developed an automatic diagnosis system which can be mounted on a vehicle and check the loop detector’s speed accuracy during the vehicle’s driving condition. And this study comparatively verified this system with the test being used by KOLAS, a national authorized test institution, and as the result from that, it was considered that this developed system would be effectively applied to practices.

스마트 축사 환경을 위한 IoT 기반 윈치 커튼 자동 제어 시스템 설계에 관한 연구

곽표성(Pyo-Sung Gwak),박의준(Eui-Jun Park),송제호(Je-Ho Song) 한국산학기술학회 2023 한국산학기술학회논문지 Vol.24 No.10

본 논문에서는 축사 내 가축의 환경 개선을 위한 IoT 기반 윈치 커튼 자동 제어 시스템의 설계에 관한 연구를 제안한다. 윈치 커튼 자동 제어 시스템은 실시간으로 축사 내부의 환경 데이터를 수집하여 온도, 습도, 강수 여부 등을 모니터링하고, 이를 기반으로 축사의 윈치 커튼을 자동으로 개폐하여 가축의 생산성을 증대하고 건강 상태를 개선하고자 하였다. 또한, 모터의 과부하와 같은 위험 상황 시 이를 감지하여 시스템을 자동으로 정지하고 경보를 울려 사용자가 신속하게 대응이 가능하도록 하였다. 윈치 커튼 자동 제어 시스템의 구현을 위해 모터 제어, 통신, 디스플레이, 키보드 회로를 설계하고 PCB를 제작하였다. 이후, 윈치 커튼 자동 제어 시스템의 성능 검증을 위하여 시험을 실시하였으며 과부하 상황에서의 정지 동작 시간은 0.096 sec, 퓨즈 단선 검출 시간은 3.39 sec로 목표치를 달성하였다. 또한, 키패드를 통해 시스템을 조작하고 디스플레이가 안정적으로 작동하는 것을 확인하였다. 이를 통하여 윈치 커튼 자동 제어 시스템의 안전성과 기능성을 검증하였으며, 이러한 IoT 기반 윈치 커튼 자동 제어 시스템이 축사 내 가축의 생산성 향상과 건강 유지에 도움을 줄 수 있을 것으로 기대된다. In this paper, we propose a study on the design of an IoT-based automatic winch curtain control system for improving the environment of a livestock barn. The w automatic inch curtain control system collects environmental data inside the livestock barn in real time to monitor temperature, humidity, and precipitation status. Based on this, it automatically opens and closes the winch curtain of the livestock barn to enhance livestock productivity and improve their health. In addition, it detects dangerous situations such as motor overload, automatically stops the system, and sounds an alarm, allowing users to respond quickly. To implement the automatic winch curtain control system, motor control, communication, display, and keyboard circuits were designed, and a PCB was manufactured. Afterwards, tests were conducted to verify the performance of the automatic winch curtain control system. The stop operation time in overload situations was 0.096 s, and the fuse blowing detection time was 3.39 s, achieving the target values. Additionally, the system was operated using a keypad, and the display was confirmed to operate stably. Through these tests, the safety and functionality of the automatic winch curtain control system were verified. It is expected that this IoT-based automatic winch curtain control system will help improve the productivity and maintain the health of livestock in livestock barns.

Estimation of Flow Rate in Automatic Pouring System with Real Ladle Used in Industry

Yoshiyuki Noda,Kazuhiko Terashima 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8

This paper gives a method for estimating flow rate of an outflow liquid from tilting-ladle type automatic pouring system used in casting industry. In order to precisely pour molten metal into the mold, controlling flow rate of liquid flowing out of the ladle is absolutely necessary. However, it is difficult to directly measure the flow rate by using a conventional flow meter, because the flow meter is damaged by the molten metal. Therefore, in this study, we used a soft sensing technique as part of the flow rate estimation system. In this approach, the pouring model is generalized to meet the ladle with diversity-shape. Then, the proposed model is incorporated in an Extended Kalman Filter for estimating the flow rate. The proposed system enables to apply the automatic pouring system with real ladle which has complicated shapes. The effectiveness of the proposed flow rate estimation system is demonstrated through experiments.

방공무기 차량의 자동 엔진시동장치 적용성에 관한 연구

임상진,황부일,이동건 한국기계기술학회 2019 한국기계기술학회지 Vol.21 No.5

In case vehicle system has low travel distance and short duration of engine operation, this can be relatively susceptible to engine scuffing related problem. Users also experience inconvenience in system maintenance that they have to manually start engine periodically in cold night during winter. In order to solve such problems and improve system's life cycle, the automatic engine start system is developed. In order to develop the automatic engine start sytem for air defense system BIHO, two types of engine start sytem and the engine sub system are studied and four steps to start and control the automatic engine start system is suggested. The prototype of automatic engine start system was tested for the single assembly and vehicle-installed test and all requirement of the system was madeto prove its possible application.

Design and Implementation of the Automatic cable assembly test system that can test cable assembly effectively

Ki-Mang Jang(장기만) 한국컴퓨터정보학회 2018 韓國컴퓨터情報學會論文誌 Vol.23 No.7

In this paper, we propose the principles and design details of Automatic cable assembly test system and show its utility. Testing the cable assembly is required periodically or non-periodically in the system that the cable assembly performance is quite important like military equipment. There are several weaknesses when humans test the cable assembly manually. It not only takes much time but also could happen human error. To improve these disadvantages, I developed Automatic cable assembly test system. The system can be implemented by building switching control system that connect and disconnect the cable assembly and measuring devices. Through the result of the cable assembly test with this test system, we show this system makes test time short and improves of test reliability as compared with manual test.

Development of a Water-Spraying Type Automatic Glochids Removal System for Cactus (Opuntia humifusa) Stem

( Ik Joo Jang ),( Yu Shin Ha ),( Tusan Park ) 한국농업기계학회 2016 바이오시스템공학 Vol.41 No.4

A water-spraying type automatic glochids removal system for cactus (Opuntia humifusa) stem was developed, and its performance was evaluated. The system was developed to reduce intensive human labor in removing glochids from cactus stem skin without inducing damage prior to further processing into value-added products. Methods: The developed system consists of conveyor and water-spraying systems. The conveyor system delivers cactus stems through water-spraying compartments and finally to a collecting box. In order to remove the glochids, rotating nozzles spray water over all areas (i.e., front and back faces and sides) of the cactus skin under controlled water pressure. Operating conditions such as conveyor speed, water pressure, angle of water-spraying nozzles, distance between conveyor belt and rotating nozzles, and angle of cactus flipping slide were adopted from our previous study and applied on the system design and manufacturing. The performance of glochids removal was evaluated by counting the number of glochids on the cactus stem before and after processing on the system. Results: The developed system performed efficiently and effectively under the pre-studied operating conditions except for the angle of cactus flipping slide. The new system had a glochids removal ratio of 94.1% without damaging the cactus skin. Considering the original number (approximately 30.60) of glochids, the remaining number was low (1.4), and most of them were found at the side edge of the cactus stem. This system can remove glochids from 360 cactus stems in 1 hr regardless of cactus size. Conclusions: The performance of the new system in glochids removal without damaging cactus skin is superior to any other existing device (i.e., brush type, rubber-friction type, and agitation type). The system is expected to be applied in cactus (O. humifusa) processing facilities.

항공 우주 해상 : ADS-B 서버 시스템의 설계 및 구현

조태환 ( Taehwan Cho ),김강희 ( Kanghee Kim ),김진혁 ( Jinhyuk Kim ),최상방 ( Sangbang Choi ) 한국항행학회 2015 韓國航行學會論文誌 Vol.19 No.3

ASBU (aviation system block upgrade)의 핵심 시스템 중 하나인 ADS-B (automatic dependent surveillance - broadcast) 시스템을 설계하고 구현하였다. ADS-B 시스템은 4개의 블록과 10개의 유닛으로 구성되어 있으며, 구현된 ADS-B 시스템에 필터링 알고리즘을 적용하였다. 구현된 ADS-B 시스템의 성능평가를 위해 실제 항공기 데이터를 이용하였으며, 신뢰도가 확보된 레이더 데이터와 비교하였다. 또한 필터링 알고리즘을 적용한 ADS-B 데이터와 기존의 ADS-B 데이터를 항공기 선회, 이륙, 착륙, 순항 등 다양한 상황에서 비교하였다. 성능평가 결과, 구현된 ADS-B 데이터와 레이더 데이터 간의 항공기 위치 차이는 99.57 m이고, 필터링 알고리즘을 적용한 ADS-B 데이터와 기존의 ADS-B 데이터 간의 항공기 위치 차이는 평균 8.02 m로 나타났다. The automatic dependent surveillance - broadcast (ADS-B) system which is a core system of aviation system block upgrade is designed and implemented. The ADS-B system consists of the 4 blocks and 10 units, and filtering algorithm is applied to the implemented ADS-B system. To evaluate a performance of the implemented ADS-B system, real aircraft position data is used and compared reliable radar data. The comparison results show that average position difference of 99.57 m. In addition, comparisons of aircraft position data between the implemented ADS-B system employing filtering algorithm and the conventional ADS-B system under various situations are carried out, such as aircraft turning, taking off, landing, and cruising. The comparison results show that average position difference of 8.02 m.