Multiparameter sensing of paper sheets using terahertz time-domain spectroscopy: Caliper, fiber orientation, moisture, and the role of spatial inhomogeneity

H. Merbold, D. J.H.C. Maas, J. L.M. Van Mechelen

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

Terahertz radiation is used to sense multiple parameters in paper and cardboard sheets. The work advances from previous results by (i) using a stratified dispersive model approach to (ii) accurately determine caliper (sheet thickness), fiber orientation, and moisture while (iii) evaluating the impact of the spatial inhomogeneity of the sample sheets. A multitude of paper samples with varying thickness was analyzed using spatially resolved terahertz measurements in combination with a highly accurate material characterization approach. The spatial inhomogeneity of the caliper across the paper samples was found to play a significant role, which cannot be resolved by mechanical reference methods. The feasibility to detect low concentrations of moisture, e.g., through absorption of atmospheric humidity, is also demonstrated.

Original languageEnglish
Title of host publicationIEEE Sensors, SENSORS 2016 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers
ISBN (Electronic)9781479982875
DOIs
Publication statusPublished - 5 Jan 2017
Event15th IEEE Sensors Conference, SENSORS 2016 - Orlando, United States
Duration: 30 Oct 20162 Nov 2016

Publication series

NameProceedings of IEEE Sensors
ISSN (Print)1930-0395
ISSN (Electronic)2168-9229

Conference

Conference15th IEEE Sensors Conference, SENSORS 2016
CountryUnited States
CityOrlando
Period30/10/162/11/16

Keywords

  • caliper
  • fiber orientation
  • moisture
  • paper
  • sensing
  • THz
  • time-domain spectroscopy

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    Merbold, H., Maas, D. J. H. C., & Van Mechelen, J. L. M. (2017). Multiparameter sensing of paper sheets using terahertz time-domain spectroscopy: Caliper, fiber orientation, moisture, and the role of spatial inhomogeneity. In IEEE Sensors, SENSORS 2016 - Proceedings [7808683] (Proceedings of IEEE Sensors). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/ICSENS.2016.7808683