Coaxial Probe for Dielectric Measurements of Aerated Pulverized Materials

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Knowledge about the dielectric properties of materials, i.e., the relative permittivity and the conductivity, is important for various sensing applications and engineering. In pneumatic conveying systems, the dielectric properties of the transported good are affected by the transport gas, which aerates the pulverized material, effectively decreasing the permittivity. Traditional probe designs such as the open-ended coaxial probe are well suited for the dielectric characteristics of liquids, gels, and pulverized materials. However, to measure the dielectric properties for aerated materials, the probe has to provide measures to create an aerated state. In this paper, we present a probe design to measure the dielectric properties of aerated pulverized materials. The probe maintains a coaxial design with a dedicated gas injection, enabling the analysis of diluted materials. We discuss the design of the probe, show the modeling of the probe, and present suitable calibration techniques. Furthermore, we analyze the uncertainty of the probe design by means of a statistical analysis of the calibration approach.

LanguageEnglish
Article number8680048
Pages1402-1411
Number of pages10
JournalIEEE transactions on instrumentation and measurement
Volume68
Issue number5
Early online date2 Apr 2019
DOIs
StatusPublished - May 2019

Fingerprint

probes
Dielectric properties
dielectric properties
Permittivity
Calibration
permittivity
gas transport
gas injection
pneumatics
Conveying
statistical analysis
Pneumatics
Statistical methods
Gels
engineering
gels
conductivity
Liquids
liquids
Gases

Keywords

  • Calibration
  • coaxial probe
  • dielectric material parameters
  • pulverized material
  • uncertainty determination

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

Coaxial Probe for Dielectric Measurements of Aerated Pulverized Materials. / Neumayer, Markus; Flatscher, Matthias; Bretterklieber, Thomas.

In: IEEE transactions on instrumentation and measurement, Vol. 68, No. 5, 8680048, 05.2019, p. 1402-1411.

Research output: Contribution to journalArticleResearchpeer-review

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