• Title, Summary, Keyword: field test

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Studies on the Relationship of the Seed Germination Testing Methods to the Field Emergence. (종자의 발아시험방법과 포장출현과의 관계)

  • 전우방
    • Asian Journal of Turfgrass Science
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    • v.3 no.1
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    • pp.13-15
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    • 1989
  • In oder to find out the effective seed germination testing method to the field emergence, an experiment was conducted ; 1. TTC testing results were higher percentage than any other germination testing methods . 2. On the corn seed , field emergence was highly correlated with germinator test, TTC test and AA test hut cold test was lower percentage . 3. Field emergence , on the soybean seeds was highly correlated with AA test and cold test but germinator test and TTC test was higher percentage .

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A Study On Field Test of IGBT Type Propulsion System for Electric Locomotive (전동차용 IGBT형 추진제어장치의 본선시험에 관한 연구)

  • 박건태
    • Proceedings of the KIPE Conference
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    • pp.576-580
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    • 2000
  • This paper describes about the field test of IGBT VVVF inverter for the propulsion system. The 1650kV class IGBT VVVF inverter has been developed. Therefore the field test is performed in SMG 6 Line to confirm its the reliability and performance. The train consists of 4M4T and the electrical equipment for field test are as follows : VVVF inverter 4 sets 16 traction motors and 3 SIVs The propulsion system which have the excellent acceleration/deceleration and the jerk chracteristics as well as starting ability on slope are taken through the field test.

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The Study on Development and Applicability of Shotcrete Shotting Test Machine (숏크리트 타설시험기 개발 및 적용성 검토)

  • Kang, Eun-Gu;Ma, Sang-Joon
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.1333-1342
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    • 2010
  • It required excessive cost and effort to evaluate the quality of shotcrete mix for field test. Also, due to a myriad of field variables, it is difficult to get a standardized result for field test. And it is impossible to simulate the shotting process for indoor test. In this study, in order to overcome these problems, we developed a standardized Shotcrete Shotting Test Machine. Using this machine we performed shotcrete quality test and estimated the applicability of developed Shotcrete Shotting Test Machine by comparing with the results of field test.

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Domestic Application and Procedure Analysis of Gearbox Field Test (증속기 현장시험 국내 적용 사례 및 절차 분석)

  • Lee, Gwang-Se;Kang, Minsang;Kim, Seokwoo;Lee, Jin-Jae
    • New & Renewable Energy
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    • v.16 no.4
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    • pp.23-32
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    • 2020
  • The wind turbine gearbox has the longest downtime among other major turbine components such as blades, generators, and main bearings. Therefore, gearbox manufacturers conduct rig tests to evaluate conformity in terms of design and function. Rig tests, however, have limited similarity compared with atmospheric wind turbine operating conditions. Rig test conditions are thoroughly controlled and maintained by testers and the component certificates of gearboxes issued through the test cannot fulfill wind farm operator's requirements. Hence, certification bodies such as DNV-GL and UL require a mandatory gearbox field test report for type certification. The Korea Energy Agency (KEA) also introduced gearbox field test as a part of the KS type certificate in 2016, although it is optional . In this paper, gearbox field test procedures and requirements are introduced, and the first domestic application case of the test is reported. The field test was conducted with a 1.5 MW wind turbine gearbox located in Jeju as the test object.

A STUDY ON THE APPLICATION OF FIELD TESTS TO WEAK GROUND (연약지반에 대한 현장시험 적용에 관한 연구)

  • Lee, Seung-Rae;Jeong, Han-Jung;Kim, Jun-Seok
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.145-148
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    • 1992
  • This paper reports the application of field tests to weak ground. In this study, field and laboratory tests were performed in the west seashore of KOREA(Ildo, Sore, Kunsan, Youngam). Applied tests are standard penetration test, cone penetration test, dilatometer test, field vane test, unconsolidated undrained test, oedometer test and other fundametal material properties tests. The results of in-situ test are used to estimate soil types and undrained shear strengths of five clay local deposits. SPT results showed low reliability and FVT war also demonstrated the best field test to weak clayey deposits.

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Verification of Underground Distribution Line Modeling with Field Test (실증시험을 통한 지중배전선로 모델링 기법 검증 연구)

  • Yun, Chang-Sub;Lee, Jae-Bong;Kim, Byong-Suk;Lee, Jong-Beom
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.12
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    • pp.2091-2097
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    • 2007
  • This paper described the verification of modeling technique of underground distribution from comparison between field test and simulation. It needs more exact transient phenomenon analysis model to establish lightning protection of underground distribution line. Although, there were a lot of transient phenomenon researches, nobody could has verified the confidence of modeling from field tests in interior until now. So, simulation model verified field test is needed to analyse transient phenomenon of underground distribution system. The examination must be accomplished in many different condition before suggesting these verified analysis model. In this paper, the conditions were examined and the various data results on the different line composition was compared with the EMTP simulation, when the lightning impulse test was accomplished at underground distribution line. Also the value between field test and simulation was very closed and the method of modeling has demonstrated confidence, when the method is used to analyse domestic transient phenomenon of underground distribution.

A Study of HFC Network quality as BcN(Broadband convergence Network) access network. (광대역통합망 구축을 위한 HFC망의 활용 가능성 연구)

  • Kim, Tae-Woong;Chung, Moo-Il;Kim, Hong-Iq;Im, Joon-Soon;Park, Sung-Kwon
    • Proceedings of the IEEK Conference
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    • pp.167-170
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    • 2005
  • We performed field test and analyzed results of field test in variable HFC(Hybrid Fiber Coaxial) network environments. And we investigated whether the test results is satisfied in DOCSIS(Data-over-Cable Service Interface Specification) 2.0 and OpenCable standard. Also, we propose HFC improvement problem for HFC Network quality as BcN(Broadband convergence Network) access network. We tested three sample areas. The sample areas represent various type of SO(System Operator) in korea. The field test was to measure signal level about digital channels. In results of multiple digital channels, in case of "Equalizer ON", we could be obtained very good test results. The results of field test were shown in satisfying recommended values in DOCSIS 2.0 and OpenCable. So, we could have confidence through field test that BcN will be possible to be adapted to environment of korea HFC network.

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Design and Construction of Test Field for Low Voltage Under Cable Fault Location Detection (저압 지중케이블 고장 위치 검출 실증 시험장 설계 및 구축)

  • Oh, Hun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.10
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    • pp.6666-6672
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    • 2015
  • Various reflectometry methods to locate power cable fault have been studied. But, most related studies has been verifying by simulation and laboratory test and study in conditions similar with real cable fault filed was not performed due to the absence of cable fault test field. Therefore, this paper design and construct test field for the standardized performance test and the operating education of cable fault location equipments. In the constructed test, open, short, half open and poor contact fault at 100m, 200m location of cable was produced and 1km cable role was installed for maximum distance measurement test. The test field will be used in the development and standardization of cable fault location technology, and te performance evaluation and certificate test of the related equipments.

Rerformance Evaluation of ER Suspensions Under Field Test (실차 시험을 통한 ER 현가장치의 성능평가)

  • Lee, Heon-Gyun;Choe, Seung-Bok;Han, Seung-Jik;Jang, Yu-Jin;Lee, Seong-Beom
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.2
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    • pp.347-354
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    • 2000
  • This paper presents performance characteristics of a semi-active suspension featuring continuously variable ER (electro-rheological) dampers. These are evaluated through the field test of a passeng er car. Four ER dampers (two for front and two for rear part) are manufactured and their field-dependent damping properties are experimentally investigated. The damping force responses to step input fields are also identified by employing small size of high voltage amplifiers which are made adaptable to the field test. A skyhook controller considering the vertical, pitch and roll motions is formulated and incorporated with a car to be tested. The field test is then undertaken in order to evaluate both comfortability and steering stability showing bump, dive and squat responses.

Characterization of Durability of PC panel by Accelerating Test in Deterioration Chamber and Long-Term Field Exposure Test (촉진열화 및 장기폭로시험에 의한 고성능 PC패널의 내구성능 및 열화특성)

  • Ma, Sang-Joon;Jang, Pil-Sung;Choi, Jae-Suk;Ju, Jung-Min
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.1549-1554
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    • 2008
  • In this paper, The evaluation of durability of the PC Panel lining for tunnel structure was examined through the rapid test by carbonation and freezing and thawing. Also for the purpose of improvement of durability. Namely, the durable characteristics of PC Panel lining by carbonation and freezing and thawing, was evaluated by rapid test and long-term field exposure test and main influence factors were derived. As a result of test, Correlation of accelerating test in deterioration chamber and long-term field exposure test, it will be expected that the proposed correlation well to the prediction of life expectancy of structure and is contributed greatly in the future.

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