Publication detail

A Method of Tactile Resistive Sensor Array Calibration

HUSÁK, M. MIHÁLIK, O. DVORSKÝ, P. BRADÁČ, Z.

Original Title

A Method of Tactile Resistive Sensor Array Calibration

Type

conference paper

Language

English

Original Abstract

Resistive sensor arrays (RSA) comprising of pressure-sensitive elements find broad use in pressure-sensing applications. However, sensor manufacturing inevitably yields a number of non-ideal properties. The gain, offset or non-linearities of an RSA’s elements may vary between individual sensors (taxels). Hence a simple calibration procedure to suppress these effects is desirable. The paper presents a method of and apparatus for the calibration of a pressure-sensing RSA. A forward mathematical model for each sensor is obtained during the calibration phase. In subsequent online measurement, the inverse model is utilised to compensated for the non-uniformity in sensor gain and offset. This approach leads to an appreciable improvement in picture quality, which can be mathematically quantified using classification accuracy in our tactile anti-decubitus platform for human monitoring. Namely, in a four-class classification experiment involving a support vector machine, the classification error decreased from 11 % before calibration to 3.5 % after calibration. Owing to the calibration procedure, a classifier trained using a calibrated RSA can be deployed to another calibrated RSA, without further data collection.

Keywords

calibration, pressure, resistive sensor array, tactile platform, robustness

Authors

HUSÁK, M.; MIHÁLIK, O.; DVORSKÝ, P.; BRADÁČ, Z.

Released

14. 8. 2024

Publisher

Elsevier

Location

Brno, Czechia

ISBN

2405-8963

Periodical

IFAC-PapersOnLine (ELSEVIER)

Year of study

58

Number

9

State

Kingdom of the Netherlands

Pages from

37

Pages to

42

Pages count

6

URL

https://doi.org/10.1016/j.ifacol.2024.07.368

BibTex

@inproceedings{BUT189138,
  author="Michal {Husák} and Ondrej {Mihálik} and Petr {Dvorský} and Zdeněk {Bradáč}",
  title="A Method of Tactile Resistive Sensor Array Calibration",
  booktitle="18th IFAC Conference on Programmable Devices and Embedded Systems – PDeS 2024",
  year="2024",
  journal="IFAC-PapersOnLine (ELSEVIER)",
  volume="58",
  number="9",
  pages="37--42",
  publisher="Elsevier",
  address="Brno, Czechia",
  doi="10.1016/j.ifacol.2024.07.368",
  issn="2405-8963",
  url="https://doi.org/10.1016/j.ifacol.2024.07.368"
}