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허진,김영학,신광호,사공건,Hur, J.,Kim, Y.H.,Shin, K.H.,Sa-Gong, G. 한국전기전자재료학회 2004 전기전자재료학회논문지 Vol.17 No.1
Magneto-Impedance(MI) sensor is a highly sensitive sensor, which was able to detect a weak geomagnetic field. It also has a merit to be able to build in the low power system. In this study, their magnetic permeability and anisotropy field(H$\sub$k/) as a function of some different thickness of sputtered amorphous CoZrNb films with zero-magnetostriction and soft magnetic property are investigated. In order to make a uniaxial anisotropy, film was subjected to the post annealing in a static magnetic field with 1KOe intensity at 250, 300, and 320$^{\circ}C$ respectively for 2 hours. Magnetic properties of films are measured by using a M-H loop tracer. Magnetic permeability of a film is measured over the frequency range from 1 ㎒ to 750㎒. By thickening a CoZrNb film relatively, magnetic permeability and impedance are examine to design the. MI sensor which drives at 50㎒, and thereof fabricated the MI sensor which drives at the 50㎒.
신광호(K . H . Shin),김문기(M . K . Kim),김준수(J . S . Kim),류길하(G . H . Ryu),조현찬(H . C . Cho),최성주(S . J . Choi),윤한경(H . K . Yun) 대한공업교육학회 1995 대한공업교육학회지 Vol.20 No.1
In production manufacturing area, many companies recently have a lot of difficulties due to the trade protectionism from leading countries externally and the labor dispute including wages of workers internally. Manufacturers put efforts to change their production lines by using automation techniques. The vocational education system is still wandering and is not following demands of skilled workers related automation in the industrial society. The production system of manufacturing has a wide range of automatization that requires background knowledge about computer, control, mechanics, and electronics. But the curriculum of vocation training related automation is far from the demand of skilled worker in automated production system. In the previous research, a curriculum of vocational training of automation techniques for good quality and high productivity was suggested. In this paper, the technical qualifying examination related automation areas is proposed which satisfies to demands of these days industry, and a real practical exam is given as a model which is able to estimate the ability of trainee and all of background knowledge related automation areas.
SmCo박막의 바이어스자계가 CoZrNb박막의 연자성특성에 미치는 효과
신광호(K. H. Shin),김영학(Y. H. Kim) 한국자기학회 2003 韓國磁氣學會誌 Vol.13 No.5
To investigate whether the use of hard magnetic film is available to generate bias magnetic field for a magnetoimpedance sensor, the magnetic properties of SmCo hard magnetic films were investigated as a function of their compositions. The saturation magnetization decreased with Sm content increasing in SmCo films. And, the coercive force increased in the extent of Sm content of 28 at%, but decreased as Sm content increased moreover. The bias field effect of SmCo film to amorphous CoZrNb film was investigated with the magnetization corves, permeabilities, and magnetic domain structures of SmCo/CoZrNb multilayers. The bias field of about 60 Oe was observed in the film with 3 ㎜×0.5 ㎜, which can be constructed as a MI sensor, and this result strongly indicates that the bias field generated from a hard magnetic film is adequate to enhance the sensitivity of a MI sensor with hard/soft magnetic multilayer structure.
감온 페라이트를 이용한 비접촉 온도측정시스템의 감도특성
신광호(K. H. Shin),김영학(Y. H. Kim) 한국자기학회 2004 韓國磁氣學會誌 Vol.14 No.1
To construct the non-contact temperature detection systems, LC resonance type sensors composed of temperature sensitive ferrite inductors and capacitors were used, and their wireless temperature detection performances were investigated. The temperature was wirelessly detectable using the fabricated LC resonance sensors with a transmitter and receiver, because their inductances and resonance frequencies were changed according to the temperature dependance of permeability of the ferrites. The sensitivity of the system was decreased with the distance ι between transmitter and receiver as a ratio of the l^6.
신광호(K . H . Shin),김문기(M . K . Kim),김준수(J . S . Kim),류길하(G . H . Ryu),조현찬(H . C . Cho),최성주(S . J . Choi),윤한경(H . K . Yun) 대한공업교육학회 1994 대한공업교육학회지 Vol.19 No.2
With a rapid development of new technologies such as computer and mechatronics, production techniques in manufacturing field are changing so fast and desires for automatization of production systems are increased in modern industry. However the realization of industrial structure in our countries is a little different from leading countries. In practical view, the production systems of our country have a wide range of automatization in manufactures, and most of the production systems are far from the fully automatic system and the computerized system in leading countries. Such industrial structure with wide range of automatizationis required various kinds of skilled workers who have the background knowledge about computer, control, mechanics and electronics. The purpose of this project is to develop a part of education program about vocational training of automation technology for good quality and high productivity in developing country, and suggests a prototype of curriculum for the automatized production system to fit in the request of modern manufacturing industry.