• Analytical Science and Technology
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• v.13 no.5
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• pp.1079-1087
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• 2000

• Proceedings of the Korean Magnestics Society Conference
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• 2001.04a
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• pp.72-73
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• 2001

• Proceedings of the KIEE Conference
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• 1999.07a
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• pp.293-295
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• 1999

피 측정물의 변위를 기계적 변화로 감지하여 나타내는 LVDT는 상호인덕턴스 변화를 이용하는 대표적 변위 트랜스듀서이다. 본 연구에서는 LVDT에 대한 상품화를 위한 설계와 제작, 그리고 신호변환장치에 대한 과정을 기술하였으며, 최종 성능 특성을 측정하여 상품화를 위한 신뢰성의 정도와 선형도 등을 평가하였다. 이러한 상품화 과정을 통하여 산업현장에서 자동계측과 제어를 위한 트랜스듀서로 활용할 수 있도록 하고자 한다.

• Proceedings of the Korean Vacuum Society Conference
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• 2007.08a
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• pp.366-366
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• 2007

• Proceedings of the KOSOMBE Conference
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• v.1996 no.05
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• pp.60-64
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• 1996

This paper describes the development of portable arousal measurement and analysis system. Skin impedance change which responds the change of arousal level was detected by the three electrode constant current method and separated into two components (SIR, SIL). Relationship between Nz, IRI and arousal level was studied and Criteria of arousal level control was decided by the sleep study.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.905-906
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• 2007

An intercomparison of ac shunts between the National Research Council of Canada and Korea Research Institute of Standards and Science is presented. The comparison was performed for the recently develop 1 A and 5 A current shunts at KRISS. The results of the both phase angle and ratio error of the resistive shunts are agree within the level of $\pm$1.5ppm and $\pm$5ppm respectively at 50 Hz.

• Proceedings of the KIEE Conference
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• 2002.07b
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• pp.625-627
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• 2002

High precision voltages. currents. power factor and electrical power measurements wide range of frequency can be achieved by using the thermo-elements (thermal converters). This paper describes the development wattmeter. based on a thermal principle. The instrument has been performed measurement in the range of currents from 0 to 50 A, voltages up to 600 V, power factor 0.5. 1 and frequencies from 45 Hz to 3 kHz. The thermal converters with two heater are used in the functional element of the wattmeter.

• Bulletin of the Korean Chemical Society
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• v.32 no.spc8
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• pp.2895-2896
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• 2011

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.06a
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• pp.267-268
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• 2009

Resistance standards from 1 ${\Omega}$ to 100 $k{\Omega}$, with calculable frequency dependencies of up to 1 MHz, have been developed for the calibration of commercial inductance-capacitance-resistance (LCR) meters and impedance analyzers. The resistors are designed on the basis of single bifilar loops. The typical resistance change from dc to 1 MHz is from 200 to $800\;{\mu}{\Omega}/{\Omega}$. According to the measurement results, the frequency dependencies of the resistors are severaltimes lower than the measurement uncertainty of commercial LCR meters.

• Journal of electromagnetic engineering and science
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• v.16 no.4
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• pp.225-228
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• 2016

KRISS-V, a V-band millimeter-wave source module for a primary RF power standard and calibration system developed by the Korea Research Institute of Standards and Science is here presented. The output power of KRISS-V is several times higher than that of commercial amplifier/multiplier chains and is highly stable (the standard deviations of output power are less than 0.01% in the worst case). The spectral purity of KRISS-V is high enough to consider it a single-tone signal generator. We also added programmable attenuation capability to KRISS-V for remote power control. Moreover, the in-house source module is cost-effective and adaptable to various measurement schemes. The structure of the model as well as detailed component information are introduced so that it can be reproduced.