• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.598-606
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• 1996

Computer testing system for pumps is an automatic measuring and testing system micro computer. There are two functions to this system. 1. Automatically controlling the testing processes. It includes controlling to testing devices, adjusting test points and starting or stopping the pump. 2. Automatically collecting and calculating the testing data. It includes the collection and calculation of the parameters to be measured, printing the testing reports and plotting the testing curves. When using it the measuring accuracy may be improved and the time for testing may be compressed by use the system . So it is used widely on the world. In this paper the basic construction and the work principle and the testing processes are described.

• 대한임베디드공학회논문지
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• 제4권4호
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• pp.156-163
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• 2009

Recently a standard software platform for automotive, AUTOSAR, has been developed to manage growing software complexity and improve software reuseability. However reuse of testing system and test data are difficult because they are dependant on implementation language and testing phases. In this paper, we suggest a automated testing approach for AUTOSAR software component using a standardized testing language, TTCN-3. AUTOSAR defines the AUTOSAR XML Schema for the data exchange format so that it is possible to automatically convert AUTOSAR model into TTCN-3 testing model. Therefore our approach is to present generation techniques for the TTCN-3 testing system from a AUTOSAR XML description. With the proposed testing techniques we can reduce time and effort to build the testing system and reuse testing environment.

• 한국신뢰성학회지:신뢰성응용연구
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• 제12권3호
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• pp.187-199
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• 2012

In general, accelerated life testing is performed to reduce testing time. But it is difficult to apply accelerated life testing to a system besides components. This paper developed a software which estimates reliability measures of the system from results of accelerated life testing of components building the system. This software can handle the system with a large number of components and complex topology. Multiple failure modes of a component were also considered in this software. Based on the software, reliability measures of a gearbox example at several conditions were estimated from the accelerated life testing results of three components of the gearbox.

• 대한임베디드공학회논문지
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• 제7권1호
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• pp.17-24
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• 2012

Recently automotive software has been more complex and needs to be reduced its development time. Software testing of its functionalities and performance should be conducted in an early development phase to reduce time to market and the development cost. Software functional testing can be performed through simulating the hardware, but it is not guaranteed that evaluation of real-time performance using simulation has enough accuracy. Real-time performance can be precisely evaluated with hardware-in-the-loop simulation, but it costs time and effort to set up hardware for testing. In this paper, we suggest a testing system that can evaluate functional requirements and real time properties with a general-purpose development board in the early development phase. In addition, we improve reusability of the testing system through modularized and layered architecture. With the proposed testing system we can contribute to building reliable testing system at low cost without difficulty.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
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• pp.84-86
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• 2005

The digital systems such as PLC or DCS have been applied to non-safety systems of nuclear power plants because of many difficulties in using analog systems. Nowadays, digital systems have been applied to safety systems of the plants such as reactor protection system. One of the main advantages of digital systems is applicability of automatic testing methods to the systems. The protection system requires high-reliability and high-availability because it shall minimize the propagation of abnormal or accident conditions of nuclear power plants. The calculation of reliability and availability of systems depends on the maintenance period of the system. In general, the maintenance period of the protection system is one-month in case of the manual test. However, the cycle of test can be shortened in several hours by using automatic periodic testing. The reliability and availability of the system is better when test period is shortened because the reliability and availability is inverse proportion to the test period. In this research, we developed the automatic periodic testing method for KNICS Reactor Protection System, which can test the system automatically without an operator or a tester. The automatic testing contained all functions of reaction protection systems from analog-to-digital conversion function of the bistable Processor to the coincident trip function of the coincident processor. By applying the automatic periodic testing to reaction system, the maintenance cost can be cut down and the reliability can be increased.

• 산업경영시스템학회지
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• 제45권4호
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• pp.53-60
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• 2022

In a group-testing method, instead of testing a sample, for example, blood individually, a batch of samples are pooled and tested simultaneously. If the pooled test is positive (or defective), each sample is tested individually. However, if negative (or good), the test is terminated at one pooled test because all samples in the batch are negative. This paper considers a queueing system with a two-stage group-testing policy. Samples arrive at the system according to a Poisson process. The system has a single server which starts a two-stage group test in a batch whenever the number of samples in the system reaches exactly a predetermined size. In the first stage, samples are pooled and tested simultaneously. If the pooled test is negative, the test is terminated. However, if positive, the samples are divided into two equally sized subgroups and each subgroup is applied to a group test in the second stage, respectively. The server performs pooled tests and individual tests sequentially. The testing time of a sample and a batch follow general distributions, respectively. In this paper, we derive the steady-state probability generating function of the system size at an arbitrary time, applying a bulk queuing model. In addition, we present queuing performance metrics such as the offered load, output rate, allowable input rate, and mean waiting time. In numerical examples with various prevalence rates, we show that the second-stage group-testing system can be more efficient than a one-stage group-testing system or an individual-testing system in terms of the allowable input rates and the waiting time. The two-stage group-testing system considered in this paper is very simple, so it is expected to be applicable in the field of COVID-19.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1156-1162
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• 2007

This paper describes overall background and current status of the establishment of multi axial fatigue testing system for rail fastening component/system. With above viewpoint, general features of rail fastening system, domestic/international testing standards, main features of testing system, application plan, etc. are summarized.

• 조명전기설비학회논문지
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• 제25권7호
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• pp.63-71
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• 2011

Due to the rapid development of digital technnology and informantion communication, in the IEC 61850 based substation automation system, the innovative paradigm shift is expected and also required in many substation-related jobs, especially in the device function test area Accordingly a common testing model which can simplify the complex contents of the SAS performance test performed by test engineers has been identified, that can overcome limitations of engineers' own testing knowledge and experience. Testing models and its design system for the comprehensive performance test of the Substation Automation System is developed and the result of the study is reported in this paper.

• 인지과학
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• 제21권2호
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• pp.283-307
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• 2010

본 연구에서는 초등학생을 위한 새로운 수학평가 시스템을 만들고 그 사용가능성을 알아보았다. 이 시스템은 최근 제안된 구성적 선다형 방식(constructive multiple-choice testing system)을 수학에 확장한 것이다. 구성적 선다형은, 동일한 문제에 대해 먼저 개방형으로 반응한다음 다시 같은 문제를 선다형으로 반응하게 하는 방식이다. 그 장점은 과정 정보를 나중에 확인할 수 있고, 수험자는 시험 종료 직후 선다형에 근거하여 피드백을 받을 수 있다는 것이다. 본 연구에서 제안된 시스템은, 수학 문제의 출제, 계정 관리를 위한 관리자 모드와 학생들이 실제 풀이 과정을 메뉴바와 키보드로 입력할 수 있도록 하는 시험 모드로 구성되어 있다. 이 방식으로 시험을 보게 한 집단과 중간 과정을 지필식으로 보게 한 집단을 비교했을 때, 시험 시간은 길어졌지만, 선다형의 집단 간 평균 점수 상에서는 차이가 없음이 관찰되었다. 이 결과는 본 연구에서 구현된 개방형 수학 시험 시스템이 실제 교실 평가에서 효과적으로 사용될 수 있음을 보여준다.

• 산업경영시스템학회지
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• 제22권49호
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• pp.135-142
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• 1999

The objective of this paper is to provide an automatic color image testing system capable of synthetically testing a color element like a color tone and a luminance for a color image displayed on the screen, using a CCD camera and a microprocess. The system consists of a CCD camera, a line conveyor, a camera driving part, a remocon, a remote sensing part, a display and a PC including a color vision board and a CPU board. By applying the system to a process, reliability for a testing result can be improved and the absolute criterion to judge a part can be made.