Next Article in Journal
Improving Intelligence and Efficiency of Salt Lake Production by Applying a Decision Support System Based on IOT for Brine Pump Management
Previous Article in Journal
FPGA Implementation of a Functional Neuro-Fuzzy Network for Nonlinear System Control
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessArticle
Electronics 2018, 7(8), 146; https://doi.org/10.3390/electronics7080146

Self-Compensated Driving Circuit for Reducing Drift and Hysteresis in Force Sensing Resistors

1
Faculty of Mechanic, Electronic and Biomedical Engineering, Universidad Antonio Nariño, Carrera 7 N 21–84, Tunja, Boyacá 150001, Colombia
2
Faculty of Sciences, Universidad Antonio Nariño, Carrera 7 N 21–84, Tunja, Boyacá 150001, Colombia
*
Author to whom correspondence should be addressed.
Received: 15 June 2018 / Revised: 7 August 2018 / Accepted: 8 August 2018 / Published: 14 August 2018
Full-Text   |   PDF [5190 KB, uploaded 14 August 2018]   |  

Abstract

Force Sensing Resistors (FSRs) are manufactured from a blend of conductive nanoparticles dispersed in an insulating polymer matrix. FSRs exhibit large amounts of hysteresis and drift error, but currently, a great effort is placed on improving their performance through different techniques applied during sensor manufacturing. In this article, a novel technique for improving the performance of FSRs is presented; the method can be applied to already-manufactured sensors, which is a clear benefit of the proposed procedure. The method is based on driving the sensors with a modified-astable 555 oscillator, in which the oscillation frequency is set from the sensor’s capacitance and resistance. Considering that the sensor’s capacitance and resistance have opposite signs in the drift characteristic, the driving circuit provides self-compensated force measurements over extended periods of time. The feasibility of the driving circuit to reduce hysteresis and to avoid sensitivity degradation is also tested. In order to obtain representative results, the experimental measurements from this study were performed over eight FlexiForce A201-25 sensors. View Full-Text
Keywords: driving circuit; force sensor; pressure sensor; tactile sensor; FSR; piezoresistive sensor driving circuit; force sensor; pressure sensor; tactile sensor; FSR; piezoresistive sensor
Figures

Graphical abstract

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).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Paredes-Madrid, L.; Fonseca, J.; Matute, A.; Gutiérrez Velásquez, E.I.; Palacio, C.A. Self-Compensated Driving Circuit for Reducing Drift and Hysteresis in Force Sensing Resistors. Electronics 2018, 7, 146.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Electronics EISSN 2079-9292 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top