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이우송(Woo-Song Lee),신창록(Chang-Rok Shin),안종국(Jong-Guk An),한성현(Sung-Hyun Han) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
The equipment of industrial robot in manufacturing and assembly lines has rapidly increased. In order to achieve high productivity and flexibility, it becomes very important to develop the visual feedback control system with Off-Line Programming System(OLPS). We can save much efforts and time in adjusting robots to newly defined workcells by using OLPS. A proposed visual calibration scheme is based on position-based visual feedback. The calibration program firstly generates predicted images of objects in an assumed end-effector position. The process to generate predicted images consists of projection to screen-coordinates, visible range test, and construction of simple silhouette figures. Then, camera images acquired are compared with predicted ones for updating position and orientation data. Computation of error is very simple because the scheme is based on perspective projection, which can be also expanded to experimental results. Computation time can be extremely reduced because the proposed method does not require the precise calculation of tree-dimensional object data and image Jacobian.
흉요추 골절에서 Fixateur Interne를 이용한 치험 보고
김병직,안종국,김용욱,임영,강석 인제대학교 1988 仁濟醫學 Vol.9 No.2
흉요추부 골절 치료에서 종래에 사용해 오던 기구들의 단점을 보완하여 두세 추체만 고정하고 내고정물의 이탈 등의 합병증을 막을 수 있는 척추 내고정물들이 최근 많이 고안되었다. 이런 장점을 가진 내고정물 중에서 골절 정복이 용이하고 기술적으로 간편한 Fixateur Interne를 흉요추 골절 2례에서 적용하여 만족할만한 결과를 얻었기에 이를 문헌 고찰과 함께 보고하는 바이다. Several transpedicular fixation devices with short fixation area, of which the functional results regarding spine mobility and reliable stability are superior to those obtainable with long range fixation system, have been presented recently. Fixateur Interne fulfills this requirement and offers a further advantage : the initially long ends of the Schanz screws permit the reduction of a single vertebra by direct means. We treated two cases of thoracolumbar spine fractures using "Fixateur Interne" which proved to be not only a stabilizing system but also a useful tool for thoracolumbar fractures.