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Finger-Shaped GelForce: Sensor for Measuring Surface Traction Fields for Robotic Hand

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4 Author(s)
Sato, K. ; Grad. Sch. of Inf. Sci. & Technol., Univ. of Tokyo, Tokyo, Japan ; Kamiyama, K. ; Kawakami, N. ; Tachi, S.

It is believed that the use of haptic sensors to measure the magnitude, direction, and distribution of a force will enable a robotic hand to perform dexterous operations. Therefore, we develop a new type of finger-shaped haptic sensor using GelForce technology. GelForce is a vision-based sensor that can be used to measure the distribution of force vectors, or surface traction fields. The simple structure of the GelForce enables us to develop a compact finger-shaped GelForce for the robotic hand. GelForce that is developed on the basis of an elastic theory can be used to calculate surface traction fields using a conversion equation. However, this conversion equation cannot be analytically solved when the elastic body of the sensor has a complicated shape such as the shape of a finger. Therefore, we propose an observational method and construct a prototype of the finger-shaped GelForce. By using this prototype, we evaluate the basic performance of the finger-shaped GelForce. Then, we conduct a field test by performing grasping operations using a robotic hand. The results of this test show that using the observational method, the finger-shaped GelForce can be successfully used in a robotic hand.

Published in:

Haptics, IEEE Transactions on  (Volume:3 ,  Issue: 1 )

Date of Publication:

Jan.-March 2010

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