RT Journal Article
T1 Accuracy and Resolution Analysis of a Direct Resistive Sensor Array to FPGA Interface.
A1 Oballe-Peinado, Oscar
A1 Vidal-Verdu, Fernando
A1 Sanchez-Duran, Jose A
A1 Castellanos-Ramos, Julian
A1 Hidalgo-Lopez, Jose A
K1 FPGAs
K1 direct sensor-to-digital device interface
K1 parallel analogue data acquisition
K1 resistive sensor arrays
AB 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.
PB MDPI AG
YR 2016
FD 2016-02-01
LK http://hdl.handle.net/10668/9806
UL http://hdl.handle.net/10668/9806
LA en
NO Oballe-Peinado Ó, Vidal-Verdú F, Sánchez-Durán JA, Castellanos-Ramos J, Hidalgo-López JA. Accuracy and Resolution Analysis of a Direct Resistive Sensor Array to FPGA Interface. Sensors (Basel). 2016 Feb 1;16(2):181
DS RISalud
RD Nov 1, 2025