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김갑순(Gab-Soon Kim),신희준(Hyi-Jun Shin),허덕찬(Duk-Chan Hu),윤정원(Jungwon Yoon) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
This paper describes the development of 6-axis force/moment sensor for an intelligent robot’s foot. In order to walk on uneven terrain safely, the foot should perceive the applied forces Fx, Fy, Fz and moments Mx, My, Mz to itself. The applied forces and moments should be measured from a 6-axis force/moment sensor attached to a humanoid robot’s foot(ankle). They in the published paper already have some disadvantage in the size of the sensor, the rated output and so on. The rated output of each component sensor (6-axis force/moment sensor) is very important to design the 6-axis force/moment sensor for precision measurement. Therefore, each sensor should be designed to be gotten similar the rated output under each rated load. So, the sensing elements of the 6-axis force/moment sensor should get lots of design variables. Also, the size of 6-axis force/moment sensor is very important for mounting to robot’s foot. In this paper, a 6-axis force/moment sensor for perceiving forces and moments in a humanoid robot’s foot was developed using many PPBs (parallel plate-beams). The structure of the sensor was newly modeled, and the sensing elements (platebeams) of the sensor were designed using FEM (Finite Element Method) analysis. Then, the 6-axis force/moment sensor was fabricated by attaching strain-gages on the sensing elements, and the characteristic test of the developed sensor was carried out. The rated outputs from FEM analysis agree well with that from the characteristic test.
직교형 손가락 재활로봇기구를 위한 힘센서 개발 및 특성실험
김갑순 ( Gab Soon Kim ) 한국센서학회 2012 센서학회지 Vol.21 No.2
Stroke patients must do the rehabilitation exercise to recover their fingers` function using a rehabilitation robot. But the rehabilitation robots mostly have not the force sensors to control the applied force to each finger. Thus, in this paper, the development of a force sensor for thumb rehabilitation robot and four two-axis force sensors for four-finger rehabilitation robot were developed. The force sensor and four two-axis force sensors could be used to measure the applied force to each finger, and the forces could be used to control the applied forces to each sensor in rehabilitation exercise using in the rehabilitation robot. The developed sensors have non-linearlity error of less than 0.05 %, repeatability error of less than 0.03 %, and the interference error of two-axis force sensor is less than 0.2 %.
김갑순(Gab-Soon Kim) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.6
This paper presents a hook-type finger force measuring system with force sensors. The system is composed of a body, two three-axis force sensors, a hook, and so on. The two three-axis force sensors system was specially designed using FEM(Finite Element Method) and fabricated using strain-gages. The sensors measure the finger forces of both normal people and handicapped people in the system, and the forces are combined. The developed hook-type finger force measuring system can measure the pulling finger force of both normal and handicapped people. The pulling force tests of men and women were performed using the developed the system. It is thought that the developed system can be used to measure the pulling force of fingers.
2축 힘/모멘트센서를 이용한 원통형 손가락 힘측정장치 개발 및 특성평가
김갑순(Gab-Soon Kim) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.5
Some patients can’ use their hands because of inherent and acquired paralysis of their fingers. Their fingers can recover with rehabilitative training, and the extent of rehabilitation can be judged by grasping a cylindrical-object with their fingers. At present, the cylindrical-object used in hospitals is only a cylinder which cannot measure grasping force of the fingers. Therefore, doctors must judge the extent of rehabilitation by watching patients’fingers as they grasp the cylinder. A cylindrical-type finger force measuring system which can measure the grasping force of patients’fingers should be developed. This paper looks at the development of a cylindrical-type finger force measuring system with two-axis force/moment sensor which can measure grasping force. The two-axis force/moment sensor was designed and fabricated, and the high-speed force measuring device was designed and manufactured by using DSP (digital signal processing). Also, cylindrical-type finger force measuring system was developed using the developed two-axis force/moment sensor and the high-speed force measuring device, and the grasping force tests of men were performed using the developed system. The tests confirm that the average finger forces of right and left hands for men were about 186N and 172N respectively.
김갑순 ( Gab Soon Kim ) 한국센서학회 2016 센서학회지 Vol.25 No.1
This paper describes the development of a rehabilitation robot that can provide wrist bending exercise to a severe stroke patient staying in a bed ward or at home. The developed rehabilitation robot has a three-axis force sensor which detects three directional force Fx, Fy, and Fz. The sensor measures a bending force (Fz) exerted on the wrist and the signal force (Fx and Fy) which can be used for the safety purpose. The robot was designed for severe stroke patients in bed, and the robot program was developed to perform a wrist bending rehabilitation exercise. In our tests including a nine-day experimental exercise, the developed force sensor-based robot operated effectively and safely.