• 열처리공학회지
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• 제34권1호
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• pp.25-30
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• 2021

The differential gear system is a device designed to distribute the driving force of both vehicle wheels and control the rotational speed when the vehicle turns on a curve. The differential device consists of a differential gear case, a ring gear, and a pressure ring. A differential pinion gear and side gear are mounted on the differential pinion shaft inside the differential gear case. In this study, a pin press-fitting device that mounts the pinier gear and side gear to the differential pinion shaft in the differential gear case was designed, and a jig device for pin press-fitting using servo press was developed. In addition, by precisely measuring the pin press-in load and press-in distance according to the pin hole diameter of the differential gear shaft, the optimization of the pin pressin process was established.

• 한국소프트웨어감정평가학회 논문지
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• 제15권1호
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• pp.109-114
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• 2019

본 논문은 프로브 핀에 대한 S-파라미터 시뮬레이션과 특성 임피던스 시뮬레이션을 수행하였고 이를 통해 프로브 핀의 고주파 성능을 분석하였다. 프로브 핀은 중앙의 한 개의 신호 핀과 상하좌우의 네 개의 접지 핀으로 배치하였다. 프로브 핀 사이의 간격을 0.35 mm, 0.40 mm, 0.50 mm으로 증가시키면서 프로브 핀의 삽입손실과 반사손실을 계산하였다. 반사손실의 주기적인 공진 현상으로 인해 프로브 핀은 서로 다른 삽입손실 특성을 가진다. 또한 프로브 핀의 배치와 피치 변화에 따른 특성 임피던스 분석을 수행하였다. 동일한 피치에서 특성 임피던스가 50 Ω에 근접하는 접지 핀 개수가 있음을 확인하였다.

• 한국전자파학회논문지
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• 제27권9호
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• pp.834-843
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• 2016

본 논문에서는 PIN 다이오드를 이용한 S-대역 고출력 경로선택형 SP4T 및 SP4T 구동회로의 설계를 보였다. 격리도 개선을 위하여 SP4T의 각 경로(path)는 직렬 및 병렬 PIN 다이오드 2개를 cascade하여 구성하였다. 설계된 SP4T 회로는 칩-형 PIN 다이오드와 박막(thin-film) 기법으로 제작된 20 mil AIN 기판을 사용하여 구현하였다. 또한, 설계된 SP4T의 구동회로는 1개의 multiplexer와 4개의 NMOS-PMOS push-pull 쌍을 이용하여 구성하였다. 온-웨이퍼 측정결과, 제작된 SP4T는 최대 삽입손실 1.1 dB, 최소격리도 41 dB의 특성을 보였다. 구동회로의 PIN 다이오드의 on-off, off-on 천이시간은 동일 PIN 다이오드의 패키지를 이용하여 시험하였으며, 모두 약 100 nsec 이하의 천이시간을 보였다. 150 W 입력 고출력 시험 결과, 격리도와 삽입손실은 동축 패키지의 손실 및 부정합을 고려하면 온-웨이퍼 측정결과에 준하는 결과를 얻었다.

• Tribology and Lubricants
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• 제25권3호
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• pp.157-162
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• 2009

In this paper, the hydrodynamic pressure and minimum oil film thickness of a pin bush bearing for a connecting rod have been analyzed as functions of the number of oil grooves and an arc length of oil grooves. The lubrication characteristic of a pin bush is governed by oil groove design factors, which are considered in this study. The most influential design parameter is a number of oil grooves, which is three oil grooves with an arc length of oil groove, 1/6($60^{\circ}$). This means that oil groove with a long arc length of a pin bush does not contribute to the hydrodynamic pressure development. Thus the optimal design of a pin bush is necessary with an increased number of oil grooves and a reduced arc length.

• 한국염색가공학회지
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• 제16권3호
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• pp.39-46
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• 2004

This study surveys the physical properties of DTY composite yarns manufactured by pin, disk and belt texturing systems. For this purpose, 208d/36f POY PET and 40d/12f high shrinkable PET filaments are prepared for specimens. The composite yarns are manufactured with this texturized POY and high shrinkable PET filament using the pin, disk and belt type texturing machines. While the processing conditions of the pin and disk types texturing machines were fixed, those of a belt type texturing machine were varied with over feed to compare and analyze with the yarn physical properties of pin and disk type composite yarns.

• 소성∙가공
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• 제12권6호
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• pp.582-587
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• 2003

This paper is concerned with the mechanical property changes of the milli-size products manufactured by forward extrusion processes with square dies. Experiments are carried out with pure aluminum and pure copper billets. Extrusion ratio and knock-out pad are chosen as the important process parameters affecting the changes of mechanical properties such as shear strength and hardness. Shear strength tests with the extruded milli-size pin have shown the strong relation between victors hardness and shear strength in the neck of a stepped pin. As the extrusion ratio increases, the hardness on both the surface and the center line of a pin also increase. It is also noted that the hardness on the surface is a little higher than that on the center. The existence of knock-out pad in extrusion die causes the hardness in the neck of a extruded pin to increase. Finally, the approximated linear relations between shear strength and hardness of a pin are suggested.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2008년도 추계학술발표대회
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• pp.1481-1484
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• 2008

대부분의 온라인 전자거래업체는 사용자의 신원을 확인하기 위해 주민등록번호를 요구하고 있다. 그러나 최근 발생하고 있는 대규모 개인정보 유출사고 등으로 주민등록번호가 노출되는 사례가 빈번하며, 주민등록정보를 타인이 도용하여도 효과적으로 확인 및 제어하는 수단이 없다는 문제가 있다. 이러한 문제를 해결하기 위해 주민번호대체수단이 제안되었으나, 최근 공공 i-PIN 과 민간 i-PIN 으로 구분되는 기술들의 연동 문제로 인해 적극적인 도입이 우려되는 상황이다. 따라서 본 논문은 최소한의 수정으로 이들 주민번호대체수단이 연동할 수 있는 방안을 제시한다. 기존의 민간 i-PIN 연동 프로토콜을 공공 i-PIN 에 적용하며 프로토콜 간의 연동 모듈을 두어 각 프로토콜을 처리한다. 제안된 기술은 공공 i-PIN 에 적용되어 현재 전국적으로 구축 중이다.

• 한국염색가공학회지
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• 제12권2호
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• pp.79-88
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• 2000

Draw textured yarns have many differences with yarn quality as well as wearing, due to the bulkiness, thermal and physical properties according to the false twist texturing system. In order to improve such property, many studies have been accomplished for developing good textured yarns and their fabrics, but these have been essentially obtained by experimental data or mathematical analysis. This study surveyed various properties of DTY produced by false twist texturing system, namely pin and crossed-belt false twist insertion systems. And 6 yarn specimens of 2 group(pin twisting type, belt twisting type) were measured and analysed.

• Tribology and Lubricants
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• 제36권2호
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• pp.64-67
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• 2020

In the conventional gerotor design, the circular arc tooth of the outer rotor is first introduced, and then the inner rotor profile is generated by simulating the outer rotor motion while the inner rotor is fixed. The profile generation of tooth meshing exhibits relativity; therefore, the outer rotor profile can be generated by the movement of the inner rotor. In this study, we propose the design of a gerotor with a pin-tooth inner rotor. First, the pin-tooth inner rotor is devised, and then the outer rotor profile is generated. The profile of the inner rotor is simply composed of equally arranged pins along a circle. The root of the inner rotor is designed as a conjugated arc of two pins. The trajectory of the pin center is obtained by the inner rotor operation, and then the outer rotor profile is determined as a parallel curve of the trajectory. In this gerotor design, the inner rotor has a simple configuration, and contact occurs between the pin parts of the inner rotor and the whole profile of the outer rotor. This affects the material selection and machining process. The pin tooth can be used to design the outer and inner rotors, enabling a double gerotor mechanism corresponding to a planetary gear system.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.239-244
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• 2007

Highly efficient and stable white PIN OLED structures have been developed with a focus on possible AM display applications. Due to the use of the novel air-stable Novaled n-dopant material NDN26, the mass production compatibility of the PIN approach is improved. With both a conventional n-dopant, NDN1, and a novel air-stable n-dopant, NDN26, similar performance in efficiency and lifetime are reached. Based on highly a stable red fluorescent emitter system, the Novaled PIN approach allows for reaching ultra-long lifetimes of 1,000,000 hours at a brightness of $1,000\;cd/m^2$, both for top and for bottom emission layouts. Furthermore, inverted PIN structures for a possible use in a-Si backplane applications for AM displays are shown. With a phosphorescent green emitter system it could be demonstrated that for bottom and inverted as well as non-inverted top emission, a brightness of $1,000\;cd/m^2$ can be reached at below 3 V. In addition to low operating voltages and long lifetimes, PIN OLEDs also enable for device structures with extremely low operating voltage drifts, a feature of increasing importance for future AM display developments.