• DocumentCode
    2165044
  • Title

    A Miniaturized Resonant Moisture Sensor

  • Author

    Jannsen, Bert ; Jacob, Arne F.

  • Author_Institution
    Institut fÿr Hochfrequenztechnik, Technische Universitÿt Braunschweig, P.O. Box 3329, 38023 Braunschweig, FR Germany. Phone:+49 531 2012, Fax.: +49 531 391 2045, e-mail: b.jannsen@tu-bs.de
  • fYear
    2001
  • fDate
    24-26 Sept. 2001
  • Firstpage
    1
  • Lastpage
    4
  • Abstract
    A novel and very compact resonant sensor is presented. It consists of a resonant metallic helix mounted in a circular waveguide which is operated below cutoff. The resonance frequency is easily adjustable via the helix dimensions. A material sensitive to the environmental properties to be detected is placed next to the helix and alters its resonance. Design and optimization of the sensor are reported with an emphasis on moisture detection. Its application in civil engineering is demonstrated with measurements of the moisture content of cement.
  • Keywords
    Building materials; Chemical sensors; Civil engineering; Concrete; Condition monitoring; Electromagnetic waveguides; Moisture measurement; Permittivity measurement; Resonance; Resonant frequency;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Microwave Conference, 2001. 31st European
  • Conference_Location
    London, England
  • Type

    conf

  • DOI
    10.1109/EUMA.2001.339096
  • Filename
    4140164
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2165044