• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 G
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• pp.2547-2549
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• 1998

Automatic yield-test equipment for micro mirror array using image processing was developed. This computerized test equipment can classify the error states of the micromirrors. The test results are displayed on the monitor as a map which shows the error states and position. It is possible to measure yield and reliability with this test equipment for micromirror array using image processing.

• Journal of Biosystems Engineering
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• 제23권3호
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• pp.259-270
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• 1998

An automatic seedling transplanter, employed an innovative plug-seedling feeder was developed by improving the problems of conversational feeding and transplanting mechanisms. With conventional methods, missing and damage rates of seedling were high for long seedlings over 20cm and also breaking seed-bed was frequently observed. Thus, a pushout-bucket slide-hopper type trandsplanter was devised and tested. Test results of picking and transferring accuracies of the developed transplanter are as follows : A prototype transplanter performed with 1.5% of missing rate. The deviations of horizontal feed ranged from -0.3mm to 2.8mm and averaged 0.673mm for the 128-hoe test tray : and ranged from -lmm to ＋3mm and averaged 0.785mm for the 200-hole test tray. The deviations could decrease with precise manufacturing and lightening the mechanism. The maximum and deviations of vertical feed were -2.3mm and + 1mm, respectively, for the 128-hole test tray ; and were ＋3mm and ＋2.5mm, respectively, for the 200-hole test tray. The missing rate, seeding bruise rate and seed-bed damage rate were esitmate to be 1.3％, 0.4% and 3.5％, respectively, with the developed automatic transplanter.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1999년도 추계학술대회 논문집
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• pp.368-375
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• 1999

This paper describes the evaluation methods and criteria used verify field performance of automatic multi-coupler for the PMC rolling stock. Automatic multi-coupler was designed and manufactured by KRRI , Woojin electric machinery CO., and Yujinchajeon MFG.CO., LTD in 1999. Through field performance test of PMC rolling stock, vibration, brake system, assembly and disassembly of complex train were measured on the condition of service operation. As a result, test results meet the criteria proposed by KNR and KRRI.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1996년도 추계학술대회논문집
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• pp.85-92
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• 1996

The Measurement method of the plastic strain ratio is various in Automotive sheet steel. In this paper, the measurement of the plastic strain are used two different methods, ASTM E 517 method and the automatic strain measurement tensile specimen during the tensile test, and compared the plastic strain ratios from the two methods. The experimental results showed that the measured plastic strain ratios from the automatic strain measurement method are coincide with that from the ASTM E 517 standard measurement in various specimens. Therefore, automatic strain measurement method by two extensometers shows good accuracy. Also, the strain dependance of plastic strain ratios could be recorded by the computer continuously and anisotropy of the strength coefficient, K, and strain hardening exponent, n ,could be compared with each direction automatically through the use of automatic strain measurement system.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.1425-1434
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• 2009

This study was aimed at comparing and assessing SPT-N values both measured by automatic and manual record devices of Standard Penetration Test. As a result, energy efficiency of hammer was approximately 62.9%, meaning SPT-N value measured by automatic recording device showed relatively accurate performance that the one done by manual device. Given the relations between hit frequency of automatic recording device and intrusion, the characteristics of stratum are expected to be proved in more accurate way. Additionally, higher confidence level seems to make it preferred and quality assessment method.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2007년도 춘계종합학술대회
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• pp.803-806
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• 2007

TRNG (True Random Number Generator)를 테스트 하는 방법은 PRNG (Pseudo Random Number Generator)나 산술연산기를 비롯한 결정적 (deterministic) 소자에 대한 테스트와는 많이 틀려서, 새로운 개념과 방법론이 제시되어야 한다. 하드웨어적으로 결정적인 소자들은 패턴을 사용한 테스트 (ATPG; automatic test pattern generation)에 의해 커버가 될 수 있지만, 순수 난수는 발생 결과의 아날로그적인 특성에 의하여 자동 패턴 생성 방식에 의해 소자를 테스트하기가 불가능하다. 본 논문에서는 하드웨어와 소프트웨어를 결합한 테스트 방식으로 테스트 패턴에 연속적인 패턴의 변화를 주면서 통계적으로 관찰하는 방식인 Diehard test라는 테스트 방식을 연구, 분석하고, 순수 난수의 테스트 시 고려해야 할 주안점을 제안한다.

• 센서학회지
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• 제24권4호
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• pp.239-246
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• 2015

Blood pressure is possible to diagnose a disease associated with blood pressure and judgment the current health of patients. Automatic blood pressure monitor capable of measuring a blood pressure easily in hospital and at home have become spread. In this study, we developed the blood pressure simulator (BPS) that can test the arm-type automatic blood pressure monitor that is commonly used in hospital. BPS is to produce a pressure similar to the pressure wave generated in the human blood using a servo disk motor. Then, using the silicon tube, it implements the situations such as human blood vessels, and to output the generated pressure waveform. Simply the BPS's phantom put on the cuff and it is able to simulate blood pressure. So anyone can quickly test the blood pressure monitor within one minute and it is possible to shorten the test time required for the automatic blood pressure monitor. In Performance test, the trends and the standard deviation of the values measured in the BPS is similar to the value of the measured pressure from people with normal blood pressure. Thus, the development BPS showed a possibility of taking into account the actual blood pressure measurement environment simulator.

• 한국항행학회논문지
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• 제22권2호
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• pp.64-69
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• 2018

비행체의 탑재장비의 야전정비를 위한 자동점검장비는 특수목적을 위한 소수의 비행체를 운용할 경우에는 통합 설계하는 것이 효율적이다. 통합형 자동점검장비는 공통적으로 사용되는 인터페이스를 식별하여 각 점검대상장비 별 점검에 사용할 수 있도록 분기하거나 경로를 생성해주는 방식이 사용된다. 분기 및 경로 생성 시 RTD, TC 및 아날로그 전압과 같은 고정밀 신호는 신호분기 및 연결 시 도선저항에 의한 측정 오류가 발생할 수 있다. 이러한 도선저항에 의한 측정 오류는 점검대상장비 설계 시 많은 제약을 가져오게 된다. 본 논문에서는 아날로그 전압 및 고정밀 신호의 측정오류를 최소화 할 수 있는 통합형 자동점검장비의 고정밀 신호의 보정방법을 제시한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.974-978
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• 1991

Electro-pneumatic valve is an electro-mechanical device which converts electric signal into pneumatic flow mu or pressure. A measurement of dynamic response time is very important to evaluate valve performance. Dynamic response time of electro-pneumatic valve has a variation accordance with valve types, operating way and test standard. In this study, automatic measurement system of dynamic response time is composed based on test condition of dynamic response time test standard(CETOP, JIS). Also, in this study test pressure variation characteristics accordance with variation of solenoid excitation power, and we developed dynamic response measurement system enable to compare of and analyze these two characteristics.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2000년도 추계학술대회 논문집
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• pp.578-585
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• 2000

ATC/ATO/TWC System is the used for the train operation instead of drivels. It is interfaced with train, train equipment, wayside facilities. In this paper described configuration signaling system, construction of signaling system software and structure of system safety. This paper describes the method of performing automatic driving by ATC/ATO/TWC. Also, reported test result for mainline static test and mainline running test.