• 한국포장학회지
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• 제29권3호
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• pp.211-221
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• 2023

This study was conducted as a basic study for the selection of tags suitable for logistics management in the palletized unit-load unit and the development of various technologies to activate the palletized unit-load shipment of agricultural products through local APCs. Three types of passive RFID tags of UHF 900 MHz and one type of active RFID tag of 2.4 GHz band designed and manufactured through this study were used to analyze the receiving strength according to the tag's attachment location and distance of the palletized unit-load of agricultural products. In the passive RFID tag, there was a large difference in receiving strength by the tag's attachment location and a large amount of data loss depending on the distance within 30 m, whereas, in the active RFID tag, it was superior to the passive tags in terms of both receiving strength and data loss. Therefore, active tags are desirable from the perspective of multiple identification of warehouses with large spaces in relation to the application of RFID tags for palletized unit-loads of agricultural products, but the development of low-power technologies such as software wakeup power management as well as hardware to minimize battery power consumption is necessary.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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• pp.156-158
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• 2004

Film printing companies have many problems during a printing process. Most of all, even an insect or dirt stick to the transparent film may cause severe errors until the end of printing job, which means big economic damage to the company. To prevent some insect-dots or dirt-dots, we have to Inspect the total area of film. However, it is very difficult to inspect the film in real-time due to the high-speed of printing that usually more than 150 m/min. A hardware based approach, for example DSP-based approach can be the one of solution candidates, but the total cost and the complexity increases the very high-level. In this paper, we suggest a software based approach, using MMX technology, to inspect the film in real-time. By Many real-plant experiments, we can see the suggest approach is applicable for the inspection of food packaging film in real-time.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2009년도 추계학술대회 논문집
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• pp.631-636
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• 2009

This paper presents design and analysis of ultrasonic vibrator featuring the piezoelectric actuator. After describing a geometric configuration of the proposed vibrator, an analytical model of the ultrasonic vibrator is formulated by adopting liquid film pattern theory and wave theory. The dynamic analysis and geometric optimization are then undertaken using a software ANSYS. The optimization is performed by taking the amplitude of the tip displacement as an objective function. The fluid flow characteristics of the proposed vibrator are analyzed by taking three different fluids: water, silicon oil and ethylene-glycol. This is achieved using a software FLUENT.

• 전자공학회논문지D
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• 제35D권7호
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• pp.63-71
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• 1998

Generally, electronic packaging designer uses HSPICE SOFTWARE TOOL to validate electric characteristics of traces layout before layout traces in PCB in hundreds Mb/s high speed digital circuits. We are in need of a plated through hole (PTH) model and a connector model to use HSPICE SOFTWARE TOOL. Those models have not been perfectly defined for HSPICE simulation. In this paper, we define a PTH model and a connector model for HSPICE simulation and discuss application range for these models. Th emodels are analytic models very applicable for HSPICE simulation and are used to analyze electric characteristic of the PTH and the connector in thetraces layout in high speed digital circuit.

• 한국소음진동공학회논문집
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• 제19권12호
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• pp.1289-1295
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• 2009

This paper presents design and analysis of ultrasonic vibrator featuring the piezoelectric actuator. After describing a geometric configuration of the proposed vibrator, an analytical model of the ultrasonic vibrator is formulated by adopting liquid film pattern theory and wave theory. The dynamic analysis and geometric optimization are then undertaken using a software ANSYS. The optimization is performed by taking the amplitude of the tip displacement as an objective function. The fluid flow characteristics of the proposed vibrator are analyzed by taking three different fluids: water, silicon oil and ethylene-glycol. This is achieved using a software FLUENT.

• 품질경영학회지
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• 제25권2호
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• pp.83-101
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• 1997

We have developed three evaluation checklists of educational softwares for users such as, learners, teachers and parents, not for the software develops or designers. This study has especially focused on CD-ROM titles and softwares on the internet. The followings were selected as the essential attributes that the educational softwares of high quality should possess : ease of use, technical support and interest of learning for learners, educational value and smartness for teachers, packaging integrity, investment value and childproof for parents. The evaluation checklists were developed on the basis of evaluation criteria which were concretion of the essential attributes. The validity of the evaluation checklists was supported by a theoretical study for the development of ckecklists and the actual development process. The interrater reliability and the retest reliability were confirmed by statistical methods. Thus, the developed checklists can be a useful tool to evaluate educational softwares. This study will contribute to improvement of the software quality and help users in selecting educational softwares.

• 한국시뮬레이션학회논문지
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• 제31권2호
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• pp.1-10
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• 2022

포장용 플라스틱 제조산업은 중국에서 오랫동안 발전해 왔지만, 대부분이 중소기업으로 자 기업의 상황에 맞는 적절한 운영방안을 가지고 있는 경우는 매우 드물다. 포장용 플라스틱 제조산업은 대표적인 주문생산 방식을 따르는 산업으로 생산과정에서 주문의 처리순서는 매우 중요하다. 잦은 제품별 전환생산으로 발생하는 재료의 낭비는 피할 수 없으며, 일반적으로 제품 간 전환생산 시에 발생하는 관련 비용도 상이하다. 따라서 본 연구는 포장용 플라스틱 필름 제조산업에서 운영수익 향상을 위한 작업 우선순위 결정 모형을 @RISK 시뮬레이션 소프트웨어를 활용하여 개발하고, 기술관리자와 현장 전문가로부터 공장의 실제 상황을 고려하여 제안된 3가지 실행 가능한 군집화 우선순위 처리 방안을 비교·분석하였다.

• 디자인학연구
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• 제14권
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• pp.193-207
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• 1996

지금까지 전자 미디어 관련 제품을 디자인하기 위해서는 일반적으로 산업디자이너는 제품의 하드웨어인 팩 키지를, 그리고 사용자-인터페이스 디자이너들은 그 제품의 소프트웨어적인 요소를 디자인하는 것에 주력하여 왔다. 그러나 컴퓨터 관련 테크놀로지가 끊임없이 진화하면서 이러한 역할의 이분화는 그 개념이 모호해져 대화형 제품 개발을 위해 점차 산업디자이너들의 사용자 인터페이스 디자인에 더 깊이 관여하게 되었다. 나아가 앞으로는 하드웨어 및 소프트웨어뿐만 아니라 제품의 제반 정보들이 하나의 제품으로 인식되어 제품의 물리적 요소 외에도 이에 대해 사용자가 가지고 있는 모든 경험들이 총체적인 사용자 인터페이스 요소로 간주되어 인터페이스 디자인 범주가 확대될 것이다. 이렇듯 인터페이스 디자인 개념의 확대와 그 중요성이 크게 부각되고 있음에도 불구하고 산업디자인 분야에서느 아직까지 인터페이스 디자인 개발 프로세스에 대한 체계적이고 실질적인 연구가 미미한 실정이다. 본고에서는 사용자 인터페이스 디자인의 이론적 고찰과 실증적인 분석을 통하여 효율적인 인터페이스 디자인 개발을 위한 인터렉션 디자인 프로세스의 연구를 그 목적으로 한다.

• 한국정보과학회논문지:소프트웨어및응용
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• 제31권6호
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• pp.792-798
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• 2004

본 논문에서는 웨이퍼 영상에서 다이 위치를 인식하기 위한 새로운 코너점 검출 방법을 제안한다. 웨이퍼 다이 위치 인식은 WSCSP(Wafer Scale Chip Scale Packaging)기술에 필수적인 과정으로서 웨이퍼 윗면의 다이 패턴을 얼마나 정확히 인식하느냐에 따라서 후 공정의 정확도가 결정된다. 본 논문에서는 정확한 다이 위치를 인식하기 위하여 계층적 명암 영상 코너 검출 방법을 제안한다. 새로운 코너 검출자는 코너 영역을 마스크 크기에 따라서 동심원으로 나누어 각각의 동심원에서의 코너성과 방향성을 구하여 정확한 코너점을 검출하도록 하였다. 또한 계층적 구조를 가지고 처리하여 기존의 명암 영상코너 검출자 보다 더 빠른 처리 속도를 얻을 수 있도록 하였다.

• 한국산업융합학회 논문집
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• 제23권3호
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• pp.507-513
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• 2020

Liquid filling machines are frequently used in packaging fields; however, there exists a problem in precisely measuring the quantity of the liquid. In the case where the liquid filling machine is not properly metered, there may be issues, such as the fluid exceeding the capacity or chemicals being exposed outside. In this paper, we propose a smart injection nozzle device that can solve the issues stated above. The proposed smart injection nozzle can raise the nozzle according to the water level to remove bubbles and inject the accurate amount of fluid. In addition, the efficiency of the logistics process is enhanced by the smart QR code. Through experiments using the developed smart injection nozzle device, we have noticed that the accuracy of injection capacity, nozzle position, reaction time and building data exceeded the target value. Therefore, it expected that this machine will give more production and save a lot of manpower for packaging industry.