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Sensors 2015, 15(8), 20409-20435; doi:10.3390/s150820409

Influence of Errors in Tactile Sensors on Some High Level Parameters Used for Manipulation with Robotic Hands

1
Departamento de Electrónica, ETSI Informática Universidad de Málaga, Andalucía Tech, Campus de Teatinos, Málaga 29071, Spain
2
Instituto de Investigación Biomédica de Málaga (IBIMA), Málaga 29010, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 20 April 2015 / Revised: 20 July 2015 / Accepted: 10 August 2015 / Published: 19 August 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [1707 KB, uploaded 21 August 2015]   |  

Abstract

Tactile sensors suffer from many types of interference and errors like crosstalk, non-linearity, drift or hysteresis, therefore calibration should be carried out to compensate for these deviations. However, this procedure is difficult in sensors mounted on artificial hands for robots or prosthetics for instance, where the sensor usually bends to cover a curved surface. Moreover, the calibration procedure should be repeated often because the correction parameters are easily altered by time and surrounding conditions. Furthermore, this intensive and complex calibration could be less determinant, or at least simpler. This is because manipulation algorithms do not commonly use the whole data set from the tactile image, but only a few parameters such as the moments of the tactile image. These parameters could be changed less by common errors and interferences, or at least their variations could be in the order of those caused by accepted limitations, like reduced spatial resolution. This paper shows results from experiments to support this idea. The experiments are carried out with a high performance commercial sensor as well as with a low-cost error-prone sensor built with a common procedure in robotics. View Full-Text
Keywords: tactile sensor errors; tactile image moments; robotic hands tactile sensor errors; tactile image moments; robotic hands
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sánchez-Durán, J.A.; Hidalgo-López, J.A.; Castellanos-Ramos, J.; Oballe-Peinado, Ó.; Vidal-Verdú, F. Influence of Errors in Tactile Sensors on Some High Level Parameters Used for Manipulation with Robotic Hands. Sensors 2015, 15, 20409-20435.

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