Development of a Small 6-axis Force/Moment Sensor for Robot′s Finger

로봇 손가락용 소형 6축 힘/모멘트센서 개발

  • 김갑순 (경상대학교 제어계측공학과)
  • Published : 2004.03.01

Abstract

This paper describes the development of a small 6-axis force/moment sensor for robot's finger, which measures farces Fx, Fy, Fz, and moments Mx, My, Mz simultaneously. In order to safely grasp an unknown object using the robot's gripper, and accurately perceive the position of it in the gripper, it should measure the force in the gripping direction, the force in the gravity direction and the moments each direction, and perform the force control using the measured forces and moments. Also, it should detect the moments Mx (x-direction moment), My and Mz to accurately perceive the position of the object in the grippers. Thus, the robot's gripper should be composed of 6-axis force/moment sensor that can measure forces Fx, Fy, Fz, and moments Mx, My, Mz simultaneously. In this paper, the small 6-axis force/moment sensor for measuring forces Fx, Fy, Fz, and moments Mx, My, Mz simultaneously was newly modeled using several parallel-plate beams, designed, and fabricated. The characteristic test for the developed sensor was performed, and the result shows that intereference errors of the developed sensor are less than 4.23%. Thus, the developed small 6-axis force/moment sensor may be used a robot's gripper.

Keywords

References

  1. Kim, G. S., et. Al., 'Design of sensing element for 3-component load cell using parallel plate structure', KSME, Vol. 21, No. 11, pp. 1871-1884, 1997
  2. Kang, D.I., et. Al., 'Design and evaluation of binocular type six-component load cell by using experimental technique', KSME, Vol. 21, No. 11, pp. 1921-1930, 1997
  3. Kim, G. S., et. Al., 'Development of 6-component load cell using plate beams,' KSPE, Vol. 15, No. 8, pp. 109-116, 1998
  4. Kim, G. S., 'Design and fabrication of a three-component force/moment sensor usnign plate-beam', Meas. Sci. Techonol., Vol.10, pp. 295-301, 1999 https://doi.org/10.1088/0957-0233/10/4/005
  5. Kim, G. S., et al., 'Design and fabrication of a six-component', Sensors and Actuators, Vol. 77, pp. 209-220, 1999 https://doi.org/10.1016/S0924-4247(99)00208-3
  6. Kim, G. S., Design of 3-component sensor with force/moment ratio of wide range,' KSPE, Vol. 18, No. 2, pp. 214-221, 2001
  7. Kim, G. S., 'Design of a robot's hand with two 3-axis force sensor for grasping an unknown object,' KSPE, Vol. 4, No. 3, pp. 12-19, 2003
  8. Ceccarelli, M., et al. 'Grasp Forces in Two-finger:Modeling and Measuring,' Proceeding of 5th International Workshop on Robotics in Alpe Adria-Danbube Region, pp. 321-326, 1996
  9. Castro, D., et al. 'Tactile Force Control Feedback in Parallel Jaw Gripper', Proceedings of the IEEE International Symposium on Industrial Electronics, Vol. 3, No. V.3, pp. 884-888, 1997 https://doi.org/10.1109/ISIE.1997.648836
  10. Nkgatho, S. T., et al., 'intelligent Gripper using Low Cost Industrial,' Proceedings of the IEEE International Symposium on Industrial Electronics, Vol. 2, V.2, pp.415-419, 1998 https://doi.org/10.1109/ISIE.1998.711558
  11. Obrien, D. J., et al., 'Force Explicit Slip Sensing for the Amadeus underwater Gripper', International Journal of System Science, Vol. 29, No. 5, pp. 471-483, 1998 https://doi.org/10.1080/00207729808929538
  12. Yabuki, A., 'Six-Axis Force/Torque Sensor for Assemble Robots', FUJTSU Science Technology, Vol. 26, No. 1, pp. 41-47, 1990