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강원찬(Won-Chan Kang),김대현(Dae-Hyun Kim),김영동(Young-Dong Kim) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
This paper describes the evaluation of a force-reflecting interface with ultrasonic motors(USMs). The force-reflecting interface allows a human to feel object within virtual environment. To effectively display the mechanical impedance of the human hand we need a haptic device with specific characteristics, such as low inertia, almost zero friction and very high stiffness. USMs have attracted considerable attention as the actuator satisfied these conditions USMs combine features such as high driving torque at low rotational speed, high holding torque and fast response, therefore we studied two degree of freedom force-reflecting haptic system.<br/> <br/>
강원찬(Won-Chan Kang),김동옥(Dong-Ok Kim),신석두(Suck-Doo Shin),김영동(Young-Dong Kim) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
In this paper, We have developed the high-speed controller for haptic control. The proposed controller is based on the PCI/FPGA technology, which can calculate the real positoon and transmit the force data to device rapidly<br/> The haptic system is composed of 6DOF force display device, high-speed controller. The developed system will be used on constructing the dynamical virtual environment. To show the efficiency of our system, we designed simulation program of force-reflecting As the result of the experiment, we found that the controller has much higher resolution than some other controllers. It is so efficient in a I PC-based system with 1[kHz] haptic interrupt cycle.
증례 : 소화기 ; 메켈 게실의 장간막게실띠로 유발된 반복적인 소장 폐쇄
강원찬 ( Won Chan Kang ),이윤정 ( Yoon Jeong Lee ),김수정 ( Soo Jeong Kim ),권세웅 ( Se Woong Kwon ),성인경 ( In Kyung Seong ),정은주 ( Eun Joo Jeong ),홍성노 ( Sung Noh Hong ) 대한내과학회 2014 대한내과학회지 Vol.87 No.6
저자들은 반복적인 복통을 호소하는 24세 남자 환자에서 복통의 원인을 방사선학적 방법으로 진단하지 못하였으나 단일 풍선 소장내시경에서 폐쇄를 확인하였고 복강경을 통해 메켈 게실 기시부와 연결된 장간막게실띠를 진단하고 치료하였기에 문헌고찰과 함께 보고하는 바이다. Meckel diverticulum is the most common congenital anomaly of the gastrointestinal system. Although it is commonly asymptomatic in adults, Meckel diverticulum can lead to intussusception, volvulus, inflammatory adhesions, or an internal hernia. However, small bowel obstruction due to a mesodiverticular band of Meckel diverticulum is rare. We report a case of a 24-year-old man who complained of abdominal pain and vomiting caused by recurrent small bowel obstruction. He had undergone no previous abdominal surgery. Abdominal computed tomography revealed a transition point at the mid-to-distal ileum. To identify the cause of the obstruction, we performed single-balloon enteroscopy, which revealed extrinsic compression at the proximal ileum 100 cm from the ileocecal valve. After marking the obstruction site, subsequent laparoscopy revealed a Meckel diverticulum with a mesodiverticular band, which entrapped a bowel loop and caused the recurrent small bowel obstruction. The patient was treated successfully with laparoscopic diverticulectomy. (Korean J Med 2014,87:705-709)
강원찬(Won-Chan Kang),박진석(Jin-Suk Park),김대현(Dae-Hyun Kim),신석두(Suk-Doo Shin),김영동(Young-Dong Kim) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
In this paper, we present the 3DOF force?reflecting interface which allows to acquire force of object within a virtual environment. This system is composed of device, virtual environment model, and force-reflecting rendering algorithm. We design a 3 DOF force-reflecting device using the parallel linkage, torque shared by wire, and the controller of system applied by impedance control algorithm. The force-reflecting behaviour implemented as a function position is equivalent to controlling the mechanical impedance felt by the user. Especially how force should be supplied to user, we know using a God-Object" algorithm As we experiment a system implemented by the interface of 3D virtual object and 3DOF force-reflecting . interface, we can feel a contact, non-contact of 3D virtual object surface and sensing of push button model.
강원찬(Won-Chan Kang),김동옥(Dong-Ok Kim),김원배(Won-Bae Kim),신석두(Suck-Doo Shin),김영동(Young-Dong Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
In this paper, we have developed a new Force-Display system using tendon-driven method based multiple DC motors. The proposed system is based on the HIR Lab Haptic library, which calculates the real position and renders the reflecting force data to device rapidly. The system is composed of device based tendon-driving method, high-speed controller and Haptic rendering library. The developed system will be used on constructing the dynamical virtual environment. To show the efficiency of our system, we designed simulation program, which can display the moving force (attaching, grabbing, rotating) on two virtual points. As the result of the experiment, our proposed system shows much higher resolution than any others.<br/>