• Journal of the Institute of Electronics and Information Engineers
• /
• v.51 no.6
• /
• pp.244-251
• /
• 2014

In this study, we give a detailed account of normal and abnormal state of GIS(Gas Insulated Switch-gear) using the preventive diagnostic technology. And it is based on the analysis and diagnosis for storing data of GIS by intelligent GIS monitoring system. The wave shape of GIS sound is similar to noise and is systematically generated by discharge and its corona sound. Therefore, in this paper, to classify normal and abnormal GIS sound. We could discriminate between normal and abnormal case using level crossing rate(LCR) and spectrogram energy rate.

• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.523-524
• /
• 2007

현재까지 변전소에 구축되어있는 변전소 자동화 시스템은 기존 설비를 바탕으로 지능형 장비(IED)를 추가한, 전력설비 자체의 인텔리전트화가 아닌 2차 설비(제어, 보호, 감시 장치)의 인텔리전트화를 지향하고 있었다. 그러나 본 실증변전소는 CT, PT와 같은 1차 설비에서부터 상위 시스템까지 전체 전력실비를 Intelligent화하였으며, Hardwiring되어 있는 시스템을 모두 통신과 S/W로 처리하였으며, 국내 최초로 Merging Unit을 개발, 적용하여 디지털 계전기를 검증하였다. 또한 향상된 예방진단 시스템 및 보안방재 시스템을 도입하여 변전소종합자동화 시스템을 구축하였다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2012.11a
• /
• pp.488-491
• /
• 2012

최근 카메라 센서 및 알고리즘의 발달로 엔터테인먼트 목적의 영상 시스템을 비롯한 공정 기술, 교육 및 의료 등 다양한 목적의 영상 시스템이 개발 되고 있다. 또한 범죄 예방, 사고 상황 인식을 위한 감시 영상 시스템의 연구도 활발히 진행되고 있다. 본 논문에서는 이상 상황 인식을 위한 지능형 교통 시스템에 대해 제안하고자 한다. 제안하는 시스템은 크게 학습 과정과 이상 상황 인식 과정으로 나누어진다. 학습 과정에서는 CCTV와 같은 정적인 카메라에서 촬영된 도로 교통 영상에서 이동 객체의 특징을 추출하고 이를 추적하여 특징 벡터를 구성한다. 구성된 특징 벡터들은 클러스터링 기법을 통해 장면을 모델링하는데 이용되며 최종적으로 이 모델을 이용해 실시간으로 도로 교통 영상에서 이상 상황을 인식할 수 있게 된다. 실험을 통한 성능 평가를 통해 시스템의 우수함을 확인 하였다.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.53 no.4
• /
• pp.159-166
• /
• 2016

In this paper, an active object tracking system basing on the pan/tilt-embedded stereo camera system is suggested and implemented. In the proposed system, once the face area of a target is detected from the input stereo image by using a YCbCr color model and phase-type correlation scheme and then, using this data as well as the geometric information of the tracking system, the distance and 3D information of the target are effectively extracted in real-time. Basing on these extracted data the pan/tilted-embedded stereo camera system is adaptively controlled and as a result, the proposed system can track the target adaptively under the various circumstance of the target. From some experiments using 480 frames of the test input stereo image, it is analyzed that a standard variation between the measured and computed the estimated target's height and an error ratio between the measured and computed 3D coordinate values of the target is also kept to be very low value of 1.03 and 1.18% on average, respectively. From these good experimental results a possibility of implementing a new real-time intelligent stereo target tracking and surveillance system using the proposed scheme is finally suggested.

• Journal of Intelligence and Information Systems
• /
• v.13 no.2
• /
• pp.43-53
• /
• 2007

e-Learning education system as the next educational trend supporting remote and multimedia education. However, the students stay mainly at remote place and it is hard to certificate whether he is really studying now or not. To solve this problem, some solutions were proposed such as instructor's supervision by real time motion picture or message exchanging. Unhappily, as you can see, it needs much cost to establish the motion exchanging system and trampling upon human rights could occasion to reduce the student's will. Accordingly, we propose the new intelligent system based on face recognition to reduce the system cost. The e-Learning system running on the web page can check the student's status by motion image, and the images transfer to the instructor. For this study, 20 students and one instructor takes part in capturing and recognizing the face images. And the result produces the prevention the leave of students from lecture and improvement of attention.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2009.10a
• /
• pp.717-719
• /
• 2009

It is addressed that traditional light systems are improper to be applied practically in the energy efficiency point of view. To overcome such drawback, advanced investigations are recently conducted for realizing remote control of several related equipments such as lights, heats, home appliances, etc. This paper proposes a novel power line communication system to effectively manage lights in which the conventional method is used without any modification. We timely control lights to reduce energy cost based on given time period.

• Journal of the Institute of Electronics Engineers of Korea SP
• /
• v.47 no.3
• /
• pp.11-22
• /
• 2010

This paper is a study on implementation of intelligent image surveillance system using context information and supplements temporal-spatial constraint, the weak point in which it is hard to process it in real time. In this paper, we propose scene analysis algorithm which can be processed in real time in various environments at low resolution video(320*240) comprised of 30 frames per second. The proposed algorithm gets rid of background and meaningless frame among continuous frames. And, this paper uses wavelet transform and edge histogram to detect shot boundary. Next, representative key-frame in shot boundary is selected by key-frame selection parameter and edge histogram, mathematical morphology are used to detect only motion region. We define each four basic contexts in accordance with angles of feature points by applying vertical and horizontal ratio for the motion region of detected object. These are standing, laying, seating and walking. Finally, we carry out scene analysis by defining simple context model composed with general context and emergency context through estimating each context's connection status and configure a system in order to check real time processing possibility. The proposed system shows the performance of 92.5% in terms of recognition rate for a video of low resolution and processing speed is 0.74 second in average per frame, so that we can check real time processing is possible.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.18 no.1
• /
• pp.115-121
• /
• 2004

In this paper, a new distributed intelligent control module based on LonWoks fieldbus for air handling unit(AHU) of heating, ventilating and air-conditioning(HVAC) is proposed to replace with a conventional direct digital control(DDC) system with 32 bit microprocessor. The proposed control architecture has a excellent features such as highly compact and flexible function design, a low priced smart front-end and reliable performance with various functions. This also addresses issues in control network configuration, logical design of field devices by S/W tool, Internet networking and electronic element installation. Experimental results for showing the system performance are also included in this paper.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.19 no.1
• /
• pp.233-240
• /
• 2024

In this study, we introduce a system for real-time monitoring of field conditions within an industrial complex using a 5G network UAV (: Unmanned Aerial Vehicle). When a monitoring event occurs in a sensor mounted on a UAV (detection of fire, harmful gas, or industrial disaster type human accident), key information from the sensor is transmitted to the UAS (: Unmanned Aerial System) application server. As a result of this information transmission and processing, managers or operators of the Industrial Complex Corporation were able to secure legal basis data for fatal accidents, fires, and detection of harmful gases at sites within the Industrial Complex Corporation through trigger processing for each accident risk situation.

• Journal of the Korean Society for Nondestructive Testing
• /
• v.35 no.1
• /
• pp.39-45
• /
• 2015

Applications of smart sensors have been extended to safety systems in the aerospace, transportation and civil engineering fields. In particular, structural health monitoring techniques using smart sensors have gradually become necessary and have been developed to prevent dangers to human life and damage to assets. Generally, smart sensors are based on electro-magnets and have several weaknesses, including electro-magnetic interference and distortion. Therefore, fiber optic sensors are an outstanding alternative to overcome the weaknesses of electro-magnetic sensors. However, they require expensive devices and complex systems. This paper proposes a new, affordable and simple sensor system that uses a single fiber to monitor pressures at multiple-points. Moreover, a prototype of the sensor system was manufactured and tested for a feasibility study. Based on the results of this experimental test, a relationship was carefully observed between the bend loss conditions and light-intensity. As a result, it was shown that impacts at multiple-points could be monitored.