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李權鉉,趙慶宰 東新大學校 工業技術硏究所 1997 工業技術硏究 Vol.3 No.-
This paper presents the system demonstrator for an optical fiber sensor system developed as a technological evaluator suitable for generic sensing applications. The new type of fiber-optic sensor employed a diaphragm displacement transforms pressure into optical intensity. From this sensing technique, we can know the variation of source intensity, the loss of a optical fiber, and the reflectivity of the diaphragm surface. Experimental results are applied to the low-pressure transducer suitable for measuring miniature pressure.
Systematization Design of Linear Actuator by using GAE System
Kyeng-Jai Cho,In-Su Cha,Kwon-Hyun Lee 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
In this paper, we introduce the design method using CAE(Computer Aided Engineering) which is profitable in the compatibility and standardization of the developed product, and the reduction of construction time and price to develop and design a machine equipment.<br/> Particularly, we select the standard model to design or develop from the large machinery to the super precision one, extract the peculiar characters of the model by the close analysis on the physical and technical part, the experiment for the characteristics of objective dimensions by analogical mathematical analysis for previous results, and can induce the design model demanded by user investigating optimal data in the design previous.<br/> We present the analogical algorithms and process method of design factors and restriction factors in the systematization design with computer. Then we analyze step functions for each systematization equipment and induce the process of technical data with actuator model.<br/>
조경재(Kyeng-Jai Cho),차인수(In-Su Cha),이권현(Kwon-Hyun Lee) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
We introduce the systematization design method using similarity theory which is profitable in the compatability, the reduction of construction time and price. The design method can make us predict the characteristic experiment for the magnitude we desire as the expression equation applied continuously, we can induce the design sample the users demand with the verification of the data on optimum design previously, Therefore, in case of designing and developing the. products, systematization design method is very useful for the standardization of the developed goods, compatability, the reduction of construction time and price. In this paper, we presented the analogical algorithms of systematization design using similarity theory, design factors and processing method of the restriction factors. Also, we analyzed the output voltage in terms of input voltage and displacement as choosing a differential transformer as the model.
조경재(Kyeng-Jai Cho),차인수(In-Su Cha),이권현(Kwon-Hyun Lee) 전력전자학회 1999 전력전자학술대회 논문집 Vol.- No.-
Linear induction motor made by cutting an induction motor toward the axis and by unfolding the stator and rotator is an apparatus which moves in a straight line without dynamic transformation devices such as gears and belts. Linear induction motor has been used widely for FA, OA, precise position control system and conveyance system, since the error by transformation devices doesn't occur.<br/> In this paper, with a linear induction motor (model 8228) of Lab-Volt company the characteristic of thrust was analyzed in terms of the input voltages
조경재(Kyeng-Jai Cho),차인수(In-Su Cha),이권현(Kwon-Hyun Lee) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
Applying the magnetically levitated transportation system, which is noncontact bearing system, to solve the problems such as transformation of original form or flaw of iron plate caused by transportation of thin iron plate which required high quality as body of motor vehicle, materials of electronic devices etc.. Magnetic saturation phenomena caused by thickness of iron plate and gap size between magnets. In case of iron plate, the vibration mode will be considered since vibration occurs during transportation. In order to solve the problems caused by vibration, choose the levitation system method using numbers of magnet, magnetic saturation for thickness and length of iron plate with parameters in location and gap of magnet. In this paper, we will suggest the whole design technique of magnetically levitated transportation system, namely method of magnetic attraction and transportation system.<br/> <br/>
조경재,정준호,이재수,Cho Kyeng-Jai,Jeong Jun-Ho,Lee Jae-Su 한국정보통신학회 2004 한국정보통신학회논문지 Vol.8 No.7
최근 정보통신의 흐름은 사용자의 다양한 정보 욕구를 만족시키기 위한 통신 서비스의 개발에 주력하고 있다. 근거리망의 통신에 광송신 모듈은 850nm, 1310nm의 파장대역을 사용하며, 광원의 구조는 LD를 사용하였지만, 장파장 및 Gbps급에서는 데이터 처리 능력이 뛰어난 수직공진형 표면발광 레이저(Vertical Cavity Surface Emitting Laser : VCSEL)을 많이 사용한다. 본 연구에서는 기본적인 광특성을 분석한 후 GHz급 이상에서 동작이 가능하도록 광전송 모듈을 개발하고 펄스 패턴 발생구를 이용하여 2.5GHz, 3GHz에서의 전송 특성을 분석하였다. The recent trend of information communication is to focus on improving communication services in order to satisfy the customer's desire for various information. Optical transducers of Local Area Network use 850nm or 1310nm among wavelength ranges and LD as a light source. However, Vertical Cavity Surface Emitting Laser(VCSEL) which is very excellent to deal with data processing is used at long wavelength or Gbps. In this paper, after basic optical characteristics were introduced a optical transmission module was developed to be operated over GHz and its transmission characteristics were analyzed at 2.5GHz and 3GHz with pulse pattern generator.
A Study on the Technology of the Magnetic Levitation System
Oh, Geum-Kon,Cho, Kyeng-Jai,Lee, Kwon-Hyun CHOSUN UNIVERSITY 1997 Basic Science and Engineering Vol.1 No.2
Applying the magnetically levitated transportation system, which is noncontact bearing system, to solve the problems such as transformation of original form of flaw of iron plate caused by transportation of thin iron pants which required high quality as body of motor vehicle, materials of electronic devices etc.. Magnetic saturation phenomena caused by thickness of iron plate and gap size between magnets. In case of iron plate, the vibration mode will be considered since vibration occurs during transportation. In order to solve the problems caused by vibration, choose the levitation system method using numbers of magnet, magnetic saturation ofr thickness and length of iron plate with parameters in location and gap of magnet. In this paper, we will suggest the whole design technique of magnetically levitated transportation system, namely method of magnetic attraction and transportation system.