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José Antonio Hidalgo-López   Dr.  University Educator/Researcher 
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José Antonio Hidalgo-López published an article in September 2018.
Top co-authors
Fernando Vidal-Verdú

55 shared publications

Department of Electronics, Institute of Biomedical Research of Málaga (IBIMA), University of Málaga, 29071 Málaga, Spain

Julián Castellanos-Ramos

21 shared publications

Department of Electronics, Institute of Biomedical Research of Málaga (IBIMA), University of Málaga, 29071 Málaga, Spain

Óscar Oballe-Peinado

14 shared publications

Departamento de Electrónica, Universidad de Málaga, Málaga, Spain

Publication Record
Distribution of Articles published per year 
(2009 - 2018)
Total number of journals
published in
Publications See all
Article 0 Reads 0 Citations A low-cost, high-accuracy temperature sensor array José A. Hidalgo-Lopez, Jorge Romero-Sánchez, Raquel Fernande... Published: 01 September 2018
Measurement, doi: 10.1016/j.measurement.2018.04.085
DOI See at publisher website
Article 0 Reads 0 Citations Improving Accuracy in the Readout of Resistive Sensor Arrays José A. Hidalgo-López, Raquel Fernández-Ramos, Jorge Romero-... Published: 16 July 2018
Journal of Sensors, doi: 10.1155/2018/9735741
DOI See at publisher website ABS Show/hide abstract
The most efficient way to carry out the reading of a set of resistive sensors is to organize them in an array form. This reduces the number of wires to the sum of the number of rows, M, and columns, N, and reading can be carried out using just M+N multiplexers and a single operational amplifier. The drawback in this procedure is the appearance of crosstalk (the influence of the resistance of some sensors on the measurements of others). Although different proposals have been presented in the literature to reduce this phenomenon, errors in determining the resistance values of each sensor still exist in all the proposals. This article presents a new method to determine these values, which considerably reduces errors without the need for any hardware other than the simplest reading circuits. The method consists of a very fast recursive convergence procedure. The results show that the new proposal outperforms other solutions in the first or second step.
Article 0 Reads 2 Citations High-Accuracy Readout Electronics for Piezoresistive Tactile Sensors José A. Hidalgo-López, Óscar Oballe-Peinado, Julián Castella... Published: 01 November 2017
Sensors, doi: 10.3390/s17112513
DOI See at publisher website ABS Show/hide 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.
BOOK-CHAPTER 0 Reads 1 Citation Advanced Techniques for Directly Interfacing Resistive Sensors to Digital Systems Ferran Reverter, Fernando Vidal-Verdú, José A. Hidalgo-Lopez Published: 05 April 2017
Smart Sensors, Measurement and Instrumentation, doi: 10.1007/978-3-319-55369-6_4
DOI See at publisher website
Article 0 Reads 2 Citations New Approaches for Increasing Accuracy in Readout of Resistive Sensor Arrays Jose A. Hidalgo-Lopez, Jose Romero-Sanchez, Raquel Fernandez... Published: 01 April 2017
IEEE Sensors Journal, doi: 10.1109/JSEN.2017.2662803
DOI See at publisher website
Article 4 Reads 2 Citations Accuracy and Resolution Analysis of a Direct Resistive Sensor Array to FPGA Interface Óscar Oballe-Peinado, Fernando Vidal-Verdú, José Antonio San... Published: 01 February 2016
Sensors, doi: 10.3390/s16020181
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
Resistive sensor arrays are formed by a large number of individual sensors which are distributed in different ways. This paper proposes a direct connection between an FPGA and a resistive array distributed in M rows and N columns, without the need of analog-to-digital converters to obtain resistance values in the sensor and where the conditioning circuit is reduced to the use of a capacitor in each of the columns of the matrix. The circuit allows parallel measurements of the N resistors which form each of the rows of the array, eliminating the resistive crosstalk which is typical of these circuits. This is achieved by an addressing technique which does not require external elements to the FPGA. Although the typical resistive crosstalk between resistors which are measured simultaneously is eliminated, other elements that have an impact on the measurement of discharge times appear in the proposed architecture and, therefore, affect the uncertainty in resistance value measurements; these elements need to be studied. Finally, the performance of different calibration techniques is assessed experimentally on a discrete resistor array, obtaining for a new model of calibration, a maximum relative error of 0.066% in a range of resistor values which correspond to a tactile sensor.