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Sensors 2017, 17(11), 2513; https://doi.org/10.3390/s17112513

High-Accuracy Readout Electronics for Piezoresistive Tactile Sensors

1
Departamento de Electrónica, 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.
Received: 29 September 2017 / Revised: 27 October 2017 / Accepted: 31 October 2017 / Published: 1 November 2017
(This article belongs to the Special Issue Tactile Sensors and Sensing)
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Abstract

The typical layout in a piezoresistive tactile sensor arranges individual sensors to form an array with M rows and N columns. While this layout reduces the wiring involved, it does not allow the values of the sensor resistors to be measured individually due to the appearance of crosstalk caused by the nonidealities of the array reading circuits. In this paper, two reading methods that minimize errors resulting from this phenomenon are assessed by designing an electronic system for array reading, and the results are compared to those obtained using the traditional method, obviating the nonidealities of the reading circuit. The different models were compared by testing the system with an array of discrete resistors. The system was later connected to a tactile sensor with 8 × 7 taxels. View Full-Text
Keywords: resistive sensor arrays; parallel analog data acquisition; piezoresistive tactile sensors resistive sensor arrays; parallel analog data acquisition; piezoresistive tactile sensors
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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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Hidalgo-López, J.A.; Oballe-Peinado, Ó.; Castellanos-Ramos, J.; Sánchez-Durán, J.A.; Fernández-Ramos, R.; Vidal-Verdú, F. High-Accuracy Readout Electronics for Piezoresistive Tactile Sensors. Sensors 2017, 17, 2513.

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