• Journal of Korean Electronics
• /
• v.24 no.9
• /
• pp.50-53
• /
• 2004

Patent Map이란 특허기술정보를 분류ㆍ분석ㆍ가공ㆍ정리하여 필요한 기술정보를 쉽게 파악할 수 있도록 한 특허기술정보 해석서로써 특허청과 한국발명진흥회에서는 2000년부터 매년 24개 테마를 발굴, 최근 2003년까지 산업분야별 96개의 테마를 개발하여 CD-ROM과 Web Service를 통해 지속적으로 보급하여 왔습니다. 여기에서는 2003년에 기 수행된 PM보고서 중 전기/전자분야 '인터넷 정보검색'과제에 대하여 기술의 주요 구성도, 기술 및 산업시장동향, 주요 특허동향분석 결과, 향후전망 등에 대하여 간략하게 소개하고자 합니다. 이 과제에 대하여 자세한 내용을 알고자 할 경우에는 Patent Map 홈페이지[http://www.patentmap.or.kr/]에서 무료 서비스를 시행하고 있으므로 많은 열람 바랍니다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.22 no.9
• /
• pp.17-24
• /
• 2008

Recently, the importance of supplying the reliable electric power is increasing. therefore, the importance of diagnosis of power equipments is increasing also. Breaking insulation of stator windings is major cause of faults in high voltage generators. On-line PD (Partial Discharge) detection using Capacitive Coupler at stator windings is used widely to diagnose high voltage generator. However, precise PD(Partial Discharge) detection is impossible if detected signals are mixed with PD and noise signal. In this paper, we analyze detected signals using Capacitive Coupler at 13[kV] hydroelectric generator stator winding and suggest not hardware method but noise elimination algorithm for detecting PD of generator stator winding considering relation of periphery signals.

• Journal of the Korea Computer Industry Society
• /
• v.2 no.8
• /
• pp.1063-1068
• /
• 2001

In this paper, we designed a high resolution six channel DSB modulator of Acousto-Optic effect generator make use of DDS technology. Also, configured seamless connection for other instruments to use IEEE-488 bus interface. We programmed the device driver for DDS and DAC control by 80C51 assembler language. And, high resolution 6 channel DSB modulator has improved the important characteristics of that the frequency tuning range, the resolution, the switching time. This DSB modulator system can use high precision frequency synthesizer for instruments.

• Journal of the KSME
• /
• v.18 no.3
• /
• pp.55-56
• /
• 1978

고도의 산업기술 발달과 정밀한 계측기의 개발및 전자계산기 의 출현으로 많은 학자들에 의해 공학, 이학, 의학, 생물학등의 복합학문으로서의 아래와 같은 광범위한 분야에서 발전되고 있다. 복합적인 학문으로서의 생체공학을 실제의 문제해결에 응용하기 위해 생체공학자는 무엇보다도 먼저 의학, 생물학, 사회학 및 체육학을 연구하는 사람들과 상호 연관 부문에 대한 많은 상호연구 를 필요로 하고 있다.

• The Transactions of the Korean Institute of Electrical Engineers P
• /
• v.50 no.3
• /
• pp.138-144
• /
• 2001

• Proceedings of the KIEE Conference
• /
• 2011.07a
• /
• pp.1782-1783
• /
• 2011

실내공간상에서 3차원 실시간 위치를 결정하는 다양한 측지기법들이 존재하지만 $100{\mu}m$ 이하 계측기 수준의 정밀도를 측정하는 방법은 여전히 Laser Theodolite 신호를 사용할 수밖에 없다. Rotary-Laser Automatic Theodolite(R-LAT)는 Fan Laser Beam을 주사하면서 회전시킨 후 주어진 공간의 수직과 수평을 계측하는 Laser Transmitter의 한 종류이다. 본 논문에서는 R-LAT에서 발생되는 Fan Laser Beam 신호를 취득할 수 있는 센서와 증폭회로의 개발을 통하여 3차원 공간좌표에 대한 회전변환행렬로 이루어진 알고리즘을 제안하고 실험을 통하여 기존 Laser Tracker에서 구해지는 공간좌표와 상호 비교하였다.

• Journal of Industrial Technology
• /
• v.22 no.B
• /
• pp.89-93
• /
• 2002

When testing products before shipment to the customer, quality characteristics are measured to decide whether or not their values are between the specification limits. Unfortunately, this testing procedure can lead to incorrect decisions because of gauge error. That is, good products can erroneously be qualified as bad, and bad products as good, and this has consequences for producer's and consumer's risk. In cases of such as this, the compressed gauge limit can be used to achieve the desired product quality level dictated by the manufacturer or the customer. A compressed gauge limit is a limit set by the manufacturer on a test gauge that is tighter than the specification limit established by the customer. The compressed gauge limits should be set at levels to achieve the defect levels desired by the customer and simultaneously minimize the loss of good product that is rejected due to errors in the gauges. In this article, the models for determining the defect levels and the losses obtained by adding compressed gauge limits will be developed. A response surface model approach is utilized which allows an optimal operating condition to be generated relatively easily.

• Journal of the Korean Society of Industry Convergence
• /
• v.3 no.3
• /
• pp.201-207
• /
• 2000

In this study, methodologies for checking the interference between in-core instrumentation (ICI) guide tubes for routing of ICI guide tubes in the reactor coolant system of typical Pressurized Water Reactor under cold and normal operation (NOP) conditions are presented. The closest points of ICI guide tubes under cold condition are calculated by using minimize technique and are used as data for NOP analysis. Movements of ICI guide tubes under NOP condition are performed by the commercial computer code, SUPERPIPE.

• Proceedings of the Optical Society of Korea Conference
• /
• 2003.07a
• /
• pp.176-177
• /
• 2003

진공 환경 및 가스에 함유된 미량의 수증기를 정량적으로 분석할 수 있는 계측기는 각종 산업 분야에서 그 필요성이 절실하다. 몇 가지 예를 들면 다음과 같다. 전구 속에 함유된 수증기로 인해 야기되는 텅스텐 필라멘트의 산화현상은 전구의 수명을 현저히 감소시킨다. 밀봉된 금속 전기소자 표면에 흡착된 수증기를 통해 누전 현상이 발생함으로써 소자가 비정상적으로 동작될 우려가 있다. 반도체 산업분야에서는 1 ppb의 수증기가 64 Mb DRAM 제조에 영향을 줄 수 있다는 것이 보고된 바 있다. (중략)

• Korean Journal of Construction Engineering and Management
• /
• v.24 no.4
• /
• pp.52-59
• /
• 2023

Flatness inspection of PC elements is normally conducted manually by inspectors at manufacturing sites. However, the manual inspection is error-prone and subjective, so it is necessary to develop a robust and efficient flatness measurement method. Recently, a few studies of laser scanner-based flatness inspection have been conducted. However, little attention on field applicability in terms of accuracy, time and cost has been paid. To tackle the limitation, this study aims to compare three sensing method including floor profiler, terrestrial laser scanner and total station for flatness inspection of PC elements. A series of experiments on two full-scale PC slabs were conducted and the results show that the laser scanning method is the most suitable for the PC elements flatness inspection in the aspects of accuracy, time and cost.