• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1531-1535
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• 2008

The Tester of Autonomous station control system is a system which can test the main function of Autonomous station control system through the data field. The purpose of this paper is to meet the system requirements and design a main function, menu and user interface using Use-case. The main function is a time-deadline test, a schedule broadcast test, a route control test and a version-up test, etc. The design of Autonomous station control system tester plays a primary role of the important document for the upcoming future system development of the tester.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 춘계학술대회
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• pp.645-648
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• 2017

기존의 Embedded Tester는 Log 처리를 위해 TCP와 공유 파일 시스템을 이용한 Server - Client간 1-N 구조로 처리 되었다. 이러한 방식은 구현 난이도에 따른 시간적 손실과 예외처리에 따른 Tester의 리소스 낭비가 발생한다. 이에 메시징 시스템을 이용하여 분산처리가 가능한 Log 처리 메시지 레이어를 구현하고 기존의 TCP, 공유 파일 시스템 전송방식과 비교하였다. 비교 결과 메시지 레이어를 이용한 전송이 TCP 보다 더 높은 전송 대역폭을 보였다. CPU 사용량에서 메시지 레이어가 TCP 보다 낮은 효율을 보였으나 큰 차이를 보이지 않았다. 이를 통해 메시지 레이어를 이용한 Log 처리가 더 높은 효율을 보임을 알 수 있었다.

• BMB Reports
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• 제34권1호
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• pp.59-65
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• 2001

In subtractive hybridization, target sequences in the tester are enriched by hybridizing with an excess amount of driver, followed by removing the tester hybridized with the driver. All of existing subtractive cloning methods are designed to remove the tester/driver hybrid. The removal of hybrid, however, is often unsatisfactory For various reasons. In this study we developed a subtractive enrichment protocol in which the tester/driver can be completely removed by selecting only the tester/tester after hybridization. In this protocol both the tester and driver DNAs are ligated with same linker DNAs and amplified by polymerase chain reaction (PCR). The tester DNA is then digested with two different enzymes and used in subsequent hybridization with an excess driver. After hybridization, the DNA is ligated with the adaptor that is only compatible with the tester/tester. Since only the tester/tester can have the new adaptor, no tester/driver can be amplified by PCR in this protocol. Unlike other methods, a 100% subtraction efficiency can be achieved even though the enzymatic treatments used in the enrichment procedure are incomplete. Furthermore, only the hybridized tester DNA can have the new adaptor and be amplified by PCR, resulting in 100% denaturation in effect. The efficacy of this novel method was verified with the model system in which a known amount of the target sequence is included.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.1661-1666
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• 2009

This paper is analyzed the effect on characteristics of thrust force of linear induction motor(LIM) by arc type tester. Many kinds of tester have a rotational shape because of a finite length of railroad. Whereas effects by using rotational type tester are generally unknown. For reason of that, this paper is analyzed the effect on characteristics by rotational type tester using 2D finite element method(FEM), and then is compared a thrust force between linear type tester and rotational type tester. Analysis model is decided by numerical modeling for fitting the LIM for propulsion system of light rail, and it is changed to proper arc model. And then we analyzed the arc and the linear model. Consequently, arc type tester is not only useful experiment but also efficient simulation method, and small error is occurred between linear and arc model.

• 동력기계공학회지
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• 제12권3호
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• pp.38-43
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• 2008

The usage of electric forklift truck is gradually increasing due to the convenience at conveying and arranging the materials in the industrial field. In this study, the author designed and suggested the optimum driving system and load tester which both of them are the most important part of the forklift truck. The planetary gear is chose to driving system because it makes big power even though the motor size is small. The gear teeth of planetary gear were designed and the designed planetary gear was tested considering the yield strength and the abrasion of gear teeth. The B-Type electric brake which consists of multiple plates and operates with non-magnetic type was connected with a single shaft in the driving system. So, it can be applied at the sudden braking situation which has the torque increment. And it has the compact size and excellent durability Load tester can give the various levels of load to the planetary gear of driving system in the electric forklift truck and it can also measure the levels of the load which were applied. Therefore, we can measure the noise, torque and perform the durability, vibration tests using load tester. It will be economical because many kinds of test can be performed using reasonable priced load tester The driving system of electric forklift truck which has sufficient competitive can be manufactured using our designed planetary gear reducer with reasonable price. The designed load tester can use for checking the performance of other reducers, as well.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
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• pp.414-416
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• 2003

메모리 제품의 사용 환경은 점차적으로 High Speed/High Density화됨에 따라 현 Comp. Test 환경으로 Field 환경을 모두 수용하기가 어려워지고 있다. 따라서, Component Level에서 다양한 실장 System을 이용한 Screen 방법이 요구 되고 있다. 다양한 환경에서 Test를 실시하기 위해서 필수 불가결한 조건은 온도(Temperature)를 자동으로 제어(Control)할 수 있는 기능이 필요하게 되었다. 이에, 현재 사용하고 있는 방법은 Chamber나 히터를 이용하고 있으나 온도 제어가 보다 용이하고 정밀한 기능이 요구됨에 따라 열전반도체(Thermoelectric semiconductor)원리를 이용한 온도 제어 장치 도입을 위한 연구가 진행되었다. 본 논문에서는 그 개발 현황 및 평가 결과를 근거로 신규 Component실장 Tester에 효율적으로 도입 적용 가능함을 제시 하고자 한다. 또한, 향후 기타 Tester 및 산업용 설비 등에 까지 확대적용 가능함으로써 전자부품(메모리)의 품질 향상 및 설비투자 Cost절감 효과가 기대 된다.

• 열처리공학회지
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• 제12권4호
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• pp.294-302
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• 1999

Evaluation of Brinell standard hardness tester was carried out to secure its application as a national standard for Brinell hardness. Accuracies and reliabilities in load application, indenter diameter and indentation measurement were tested through evaluation of these components. The accuracies of load application for various loading conditions were within the limit of ISO and KS specifications. Errors in the indentation measurement due to the difference in personnel characters were successfully removed by utilising automatic indentation measurement system. In overall, the tester and the indentation measuring system were found to be eligible as a national standard of Brinell hardness.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.2045-2050
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• 2008

The Autonomous station control system by applying the concepts of autonomous decentralized system is a system which can solve the problems of the current central control system. The Autonomous station control system tester developed in order to test for Autonomous station control system. The main function of tester is a time-deadline test, a schedule broadcast test, a route control test and a version-up test, etc. In the paper, we build the reliability of the Autonomous station control system by testing the Autonomous station control system tester. Also, the test enable the on-line test without the system interruption and verify the function of the Autonomous station control system developed by applying the concepts of Autonomous decentralized system to the current Central control system.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.3144-3149
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• 2007

A numerical analysis for temperature distribution of four different materials such as iron, silicon, aluminum and PVC has been performed in this study to predict thermal behaviors of combined weapon systems in a large environmental tester. Thus, experimental conditions have been proposed using a calculating software (SolidWorks 2007 COSMOS FloWorks) to prepare for field tests and analyze heat flow inside the environmental tester and temperature distributions of materials. The boundary conditions of the analysis are composed of inlet and outlet conditions of the environmental tester with different pressures and the limit of low temperature of -30$^{\circ}C$. The soaking time of the system in the environmental tester has been calculated by this commercial program in this study to carry out the experiment.

• 산업공학
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• 제23권1호
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• pp.58-67
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• 2010

The purpose of this paper is to present the development processes of the assembly line tester of power transmission for lift truck. Because power transmission is most important part of lift truck, all assembled powertrain parts must be inspected for operational defects, pressures and RPM. Developed assembly line tester is designed to take about 25 minutes for inspecting each assembled power transmission and located it at the end of assembled line. The assembly line no-load tester consists of three parts: (1) the driving hardware part; for installing and operating the transmission. (2) control PCB part; send data from sensors to a computer and control driving part, (3) operation software of no-load tester; for an automatic inspection or manual inspection, for database management and printing transcripts.