• 한국정보기술학회 영문논문지
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• 제10권2호
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• pp.1-13
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• 2020

This paper presents an emergency brushless synchronous generator having rotating exciter status monitoring and protection functions. For monitoring the rotating exciter status, a wireless rotor status detector and a digital AVR(Automatic Voltage Regulator), which has a wireless communication capability, are proposed. The proposed rotor status detector detects temperatures of exciter armature and main field windings and input voltage and current of the main field. Therefore, it is possible to protect the generator from the over-temperature of windings and detect the exciter bridge diode fault. Furthermore, the proposed digital AVR has rotor status monitoring and protection function, and remote generator tuning, wireless group parallel operation function. So the operator can efficiently operate the generator using a smartphone from a remote area.

• International Journal of Internet, Broadcasting and Communication
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• 제11권2호
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• pp.27-30
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• 2019

Factory monitoring systems are gaining importance in wide areas of industry. Especially, there have been many efforts in implementation of vibration measurement and analysis for monitoring the status of rotating machines. In this paper, a digital signal processor (DSP) based monitoring system dedicated to the vibration monitoring and analysis on rotating machines is discussed. Vibration signals are acquired and processed for the continuous monitoring of the machine status. Time domain signals and fast Fourier transform (FFT) are used for vibration analysis. All of the signal processing procedures are done in the DSP to reduce the production and maintenance cost. The developed system could also provide remote and mobile monitoring capabilities to operator via internet connection. This paper describes the overview of the functional blocks of the implemented system. Test results based on signals from small-size single phase motors are discussed for monitoring and defect diagnosis of the machine status.

• 조명전기설비학회논문지
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• 제30권2호
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• pp.49-56
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• 2016

In this paper, a prototype of power supply with a power factor correction is proposed. As a unique feature the proposed power supply, a status monitoring circuit is embedded on the switching power supply. The status monitoring circuit analyzes the functionality of the system and saves the key components of the power supply in the case of malfunctions. The results of various fault tests are reported to verify the operation and performance of the proposed method. This paper discusses the experimental results of the monitoring module and provides the technical information to monitor, predict, and troubleshoot the system against the potential failure of power supplies for real applications.

• 한국항행학회논문지
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• 제27권5호
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• pp.643-648
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• 2023

한국형 위성항법보정시스템 KASS(Korea Augmentation Satellite System)은 2023년 12월 국제민간항공기구 표준의 항공용 서비스 제공을 목표로 개발 중인 SBAS 시스템이다. KASS 서비스의 지속적인 제공을 위해서는 시스템의 상태감시가 필수적이며 이를 위해 상태감시 도구가 개발되어야 한다. 상태감시 도구 개발은 목적에 따라 실시간 상태감시, 장기간 상태감시로 구분되어 개발되었다. 도구 개발은 요구사항 정의, 설계, 개발, 검증의 일련의 절차를 통해 완료하였다. 상태감시 도구 검증을 위해 실제 KASS 시스템의 2023년 8월 데이터를 활용하여 검증하였고 그 결과를 통계적으로 분석하여 운영시간, 운영률을 도출하였다. 2023년 이후부터 시작되는 항공용 서비스에 이 도구들을 활용하여 지속적 서비스 제공을 지원할 계획이다.

• 전자통신동향분석
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• 제38권6호
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• pp.31-40
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• 2023

Given recent accidents involving autonomous vehicles, driver monitoring technology related to the transition of control in autonomous vehicles is gaining prominence. Driver status monitoring systems recognize the driver's level of alertness and identify possible impairments in the driving ability owing to conditions including drowsiness and distraction. In autonomous vehicles, predictive factors for the transition to manual driving should also be included. During traditional human driving, monitoring the driver's status is relatively straightforward owing to the consistency of crucial cues, such as the driver's location, head orientation, gaze direction, and hand placement. However, monitoring becomes more challenging during autonomous driving because of the absence of direct manual control and the driver's engagement in other activities, which may obscure the accurate assessment of the driver's readiness to intervene. Hence, safety-ensuring technology must be balanced with user experience in autonomous driving. We explore relevant global and domestic regulations, the new car assessment program, and related standards to extract requirements for driver status monitoring. This kind of monitoring can both enhance the autonomous driving performance and contribute to the overall safety of autonomous vehicles on the road.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 C
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• pp.1906-1908
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• 2000

The central monitoring system with on-line diagnosis of high-voltage generator/motor stator insulation is developed. The system is capable of remote diagnosis and monitoring partial discharges of high-voltage generator/motor stator insulation. GOMS(Generator On-line Monitoring System) with maximum of 9 input channels can measure and analyze the status of high-voltage motor stator insulation by on-line. The measured and analysis data are brought to the central monitoring system via modem to build database. The central monitoring system can diagnose and monitor the insulation status of several high-voltage generator/motor at any time. The insulation status of those machines can be enhanced by the database on partial discharges.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제3권1호
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• pp.112-120
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• 2003

This paper reports the development work carried out in respect of a proposed application of Neural Network approach for the Korean Next generation Reactor (KNGR) now referred as APR-1400. The emphasis is on establishing the methodology and the approach to be adopted towards realizing this application in the next generation reactors. Keeping in view the advantages and limitation of Artificial Neural Network Approach, the role of ANN has been limited to plant status or to be more precise plant transient monitoring. The simulation work carried out so far and the results obtained shows that artificial neural network approach caters to the requirements of plant status monitoring and qualifies to be incorporated as a part of proposed operator support systems of the referenced nuclear power plant.

• 대한가정학회지
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• 제38권2호
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• pp.1-19
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• 2000

The purpose of this study was to examine the correlation between intergenerational Self-Monitoring and the purchase behaviors of clothing product, and the differences between the purchase behaviors of clothing product and demographic variables(mother's job, clothing expenditure for 3 monthes, income). For data analysis, Cronbach's $\alpha$, Correlation, ANOVA(one-way), Duncan-test, frequency, percentage, mean were used. The results of this study were as follows: 1) In the female students of university, Self-Monitoring was found to be correlative with the status symbolism, fashionability, and the aesthetic in the outerwear. And Self-Monitoring in the female students of university was not found to be correlative with mothers'Self-Monitoring and the purchase behavior standard of mother'outerwear. In their mothers, Self-Monitoring was found to be correlative with the aesthetic in the purchase behavior standard of outerwear. And Self-Monitoring was found to be correlative with the status symbolism, fashionability, aesthetic, and economy in the outerwear. 2) Generally, it was found to be correlative among the status symbolism, fashionability, and aesthetic or between the practicality and economy in the purchase behavior standard of outerwear or an ordinary dress. On the other hand, it was found to be correlative between variables of the status symbolism, fashionability, and aesthetic and variables of the practicality and economy in outerwear or an ordinary dress. 3) Mother's job, clothing expenditure for 3 monthes, and income were proven to haute the significant differences in the purchase behavior standard partially.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 추계학술대회 논문집 학회본부 B
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• pp.739-741
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• 1999

This paper describes the fault monitoring system for lift type tower parking facilities. This system consists of tower parking facility control panel and monitoring computer, and offers real-time monitoring of parking status and fault detection, and status data acquisition of tower parking system using graphic user interface.

• 공학교육연구
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• 제8권4호
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• pp.5-19
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• 2005

컴퓨터를 활용한 다양한 교육 훈련의 형태는 교육방법과 학습효과에 폭넓은 영향을 미치고 있으며, 산업 및 직업 구조의 변화에 따른 다양한 교육 훈련 형태가 출현하여 학습자 중심의 교육을 가능하게 하고 있다. 인터넷을 활용한 원격교육 및 학습자료 제공 등은 학습자의 수준에 맞는 개별화 교육을 가능하게 하고 있다. 온라인 교육의 경우, 학습자에게 다양한 정보를 즉시, 또는 지속적으로 제공하는 것이 용이하지만, 오프라인 학습의 경우, 출석, 과제, 시험 성적 등의 학업 상태와 관련된 정보를 학습자에 제공하는데 있어서 온라인 방식에 비해 비효율적인 것이 사실이다. 특히, 실습이 많은 전문대학의 공학교육에 있어서 실습결과의 평가에 대한 정보를 제공하는 것이 학업에 많은 영향을 미친다. 본 연구에서는 학업상태에 대한 다양한 정보들을 학습자 및 교수자, 지도교수 등에게 다양한 형태로 제공하는 시스템을 구현하고자 한다. 또한 다른 학습자와 비교하여 본인의 학업 상태를 비교하여 모니터할 수 있도록 하여 학습자의 학습의욕을 높이고 교수자 또는 지도교수가 학생의 학사지도나 진로지도에 활용할 수 있는 정보를 제공할 수 있도록 한다. 과목 담당 교수자의 경우 해당 과목의 전체적인 학업상태 및 개별 학습자의 학업상태 정보를 제공하여 수업의 효율을 높이도록 하고 학습자의 상담 또는 지도교수에게는 학습자가 학습한 모든 정보를 모니터할 수 있도록 하여 학사 지도 및 졸업 후 취업을 위한 기초자료로 활용할 수 있도록 하는 것을 목표로 한다.