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정재승,박재민,김병국,Jung, Jae-Seung,Park, Jae-Min,Kim, Byung-Guk 한국공간정보학회 2006 한국공간정보학회지 Vol.14 No.2
모바일매핑시스템은 차량에 GPS, IMU, CCD 카메라 등을 장착하여 대상물의 위치 및 영상정보를 획득할 수 있는 효율적인 시스템으로 도로 시설물의 유지 관리, 수치 지도의 갱신 등 여러 분야에서 활용되고 있다. 이러한 모바일매핑시스템은 CCD 카메라 영상과 차량의 위치 및 자세정보를 제공하게 되고 이는 영상안의 객체에 대한 위치정보를 제공하는데 중요한 역할을 한다. 모바일매핑시스템에서의 위치 및 자세정보를 활용하여 본 연구에서는 획득된 정보를 이용하여 특정 이동객체를 대상으로 위치 추적 기술을 적용하여 보았다. 이러한 이동객체 추적 시스템은 모바일매핑시스템에서 획득된 다양한 지리정보 중에서 필요한 특정 객체만을 추출하여 정보에 대한 활용성을 증대 시킬 수 있을 것이다. The MMS(Mobile Mapping System) using the vehicle equipped GPS, IMU and CCD Cameras is the effective system for the management of the road facilities, update of the digital map, and etc. The image, vehicle's 3 dimensional position and attitude information provided MMS is a important source for positioning objects included the image. In this research we applied the tracking technique to the specific object in image. The extraction of important object from immense MMS data makes more effectiveness in this system.
정재승(Jae-Seung Jung),문재덕(Jae-Duk Moon) 대한전기학회 2010 전기학회논문지 Vol.59 No.3
A point-mesh type corona system has been well used as a ionic wind blower. However this type corona system suffers from its lower ionic wind generation, because of its lower on-set and breakdown voltages of its very sharp needle point corona electrode. This means that the point corona electrode must act both as an effective ion-generator and a very higher electric field producer in the discharge airgap in order to generate higher ionic wind velocity. In this paper, a cylinder-mesh type discharge system as a ionic wind generator is proposed and investigated. The cylindrical corona electrode can produce many ions from its sharpened edge, and the corona on-set and breakdown voltages are very higher than those of the needle point corona electrode. As a result, this type cylindrical corona electrode might generate a higher ionic wind than the needle point corona electrode.
정재승(Jae-Seung Jung),김형표(Hyung-Pyo Kim),김진규(Jin-Gyu Kim) 한국조명·전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.11
In this paper, a corona motor with blade type electrodes has been employed as a wind blower. The rotation speed was influenced significantly by the polarity of applied voltage and the number of blades. Therefore the effect of polarity of applied voltage and the number of blades on the electrical and mechanical fundamental properties of corona motor were investigated experimentally. The rotation speed decreased for increasing of number of blades, because the mass of blades increased. But the amount of air blow increased despite decreasing of the rotation speed, because air volume is not only influenced by rotation speed but also the number of blades and ionic wind which generated between blade tips and a induction electrode. Although space occupied by blades of the corona motor is smaller than the whole area of the blast pipe, wind rises a whole range of a wind blower for such reasons.
정재승(Jae-Seung Jung),김진규(Jin-Gyu Kim),이우석(Woo-Seok Lee),문재덕(Jae-Duk Moon) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
현재 이온풍 발생장치로 주로 이용되고 있는 코로나 방전장치에는 주로 침형 또는 선형 전극이 코로나 전극으로 적용되고 있다. 이 코로나 전극들은 곡률반경이 작기 때문에 코로나 방전이 용이하여 이온의 발생에는 효과적이다. 그러나 낮은 전압에서 아크방전으로 이행되므로 이온풍속을 높이는 것에는 한계가 있다. 이온풍 발생장치에는 적용되는 코로나 전극은 이온발생과 강한 전계형성에 유리한 형태이어야 하며, 이를 위하여 끝선이 날카로운 금속관을 코로나 전극으로 적용한 이온풍 발생장치가 제안되어 연구되고 있다, 본 논문에서는 금속관형 코로나 전극을 적용한 이온풍 발생장치의 이온풍의 발생 특성에 대한 연구를 수행하였다.
교류 코로나 방전시 주파수 변화에 따른 전기유체역학적 특성
정재승(Jae-Seung Jung),김진규(Jin-Gyu Kim) 한국조명·전기설비학회 2012 조명·전기설비학회논문지 Vol.26 No.12
In this paper, EHD(electrohydrodynamics) characteristics of AC corona discharge for the various frequency was investigated. Ionic wind velocity is controlled by the frequency of applied ac high voltage, and maximum velocity of the ionic wind is obtained at 1.2kHz. Maximum velocity are 1.90 m/s by metal corona electrode and 2.72m/s by wet porous corona electrode, These attain 91∼99% of the maximum velocity in the DC corona discharge by adjusting the frequency through the experiments. In this paper, wet porous corona electrode has high possibility of cooling methode because a AC corona discharge using wet porous corona electrode is able to eject more water droplets than DC corona discharge.
날개전극형 코로나 모터의 기초 회전특성 및 에너지 효율
정재승(Jae-Seung Jung),문재덕(Jae-Duk Moon) 대한전기학회 2010 전기학회논문지 Vol.59 No.10
A corona motor, as one of a powerful cooling means of microelectronic devices, has been employed because of its very simple structure of no coils and no brushes. In this paper, the effect of polarity of applied voltage and the number of blade corona electrodes on the fundamental properties of rotation of the motor was investigated. The Ⅰ-Ⅴ and rotation characteristics of the blade corona electrode were significantly different from the different polarities of applied voltages and the blade corona electrode numbers, due to the different space charge effect resulted by the different migration mobility of the positive and negative ions generated near the blade corona electrode tip of the rotor of the motor. The rotation speed of the motor was influenced significantly by the polarity of corona discharge, the number of blades, and mass of rotor. At the same corona current, an effective rotation can be obtained with the positive corona caused by the lower ion mobility. On the other hand, the higher rotation speed can be obtained with the negative corona resulted from its higher corona current. The highest rotation speed and energy efficiency can be obtained with the rotor having 4 blades.
정재승(Jae-Seung Jung),김진규(Jin-Gyu Kim) 한국조명·전기설비학회 2012 조명·전기설비학회논문지 Vol.26 No.5
In this paper, it was investigated experimentally that diameter and polarity variation of corona wire electrode affected to ozone generation of the ozone generator using a wire-to-plate type electrode. The change in the diameter(D) of the corona wire electrode has a great effect upon ozone generation, higher influence appears in the positive corona discharge than the negative corona discharge. In the case of D=0.50[mm], maximum ozone generation and power efficiency could be obtained. However, in the case of smaller D than this, the ozone generation and efficiency decreases slowly and in the case of larger D, the ozone generation decreases rapidly. It means performance decline as an ozone generator. Therefore, ozone generation and power efficiency would increase through simple optimization of the corona electrode specification.
정재승(Jae-Seung Jung),문재덕(Jae-Duk Moon) 대한전기학회 2010 전기학회논문지 Vol.59 No.12
A corona discharge system with needle point or wire type corona electrode has been well used as an ionic wind blower. The corona discharge system with a needle point electrode produces ions at lower applied voltage effectively. However, the corona discharge on the needle point electrode transits to the arc discharge at lower voltage, and it is hard to obtain the elevated electric field in the discharge airgap for enhancing the ion migration velocity due to the weak Coulomb force. A cylindrical corona electrode with sharp round tip is reported as one of effective corona electrode, because of its higher breakdown voltage than that of the needle electrode. A basic study, for the effectiveness of cylindrical electrode shape on the ionic wind generation, has been investigated to obtain an maximum wind velocity, which however is the final goal for the real field application of this kind ionic wind blower. In this paper, a parametric study for maximizing the ionic wind velocity utilizing the cylindrical corona electrode and a maximum ion wind velocity of 4.1 ㎧ were obtained, which is about 1.8 times higher than that of 2.3 ㎧ obtained with the needle corona electrode from the velocity profile.