Contactless flow detection with magnetostrictive bilayers

Juergen Kosel*, H. Pfützner, S. Traxler, Ioanna Giouroudi, E. Kaniusas, L. Mehnen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The paper concerns the contactless detection of a magnetostrictive bilayer strip as a sensor element for measurements of an air flow through a tube. A bilayer mounted in the tube is weakly magnetized by an exterior excitation coil. Due to its nonlinear behavior, the bilayer generates a field exhibiting higher-order harmonics which is detected by an exterior induction coil. The air flow yields bending of the bilayer and thus changed harmonic response, as a basis of signal establishment. For flow dynamics of 10 Hz, effective results are presented for different induction coil positions allowing flexible adjustments to individual geometric conditions.

Original languageEnglish (US)
Pages (from-to)308-310
Number of pages3
JournalSensor Letters
Issue number1
StatePublished - Mar 2007
Externally publishedYes


  • Contactless signal detection
  • Flow measurement
  • Magnetostrictive material
  • Multifunctional sensors

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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