Magnetostrictive effect type force (strain) sensor using mutual induction of planar coils

Fumitaka Koga, Ichiro Sasada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A new structure is proposed for the magnetostrictive effect type force sensors using a pickup head layered with magnetostrictive foil and pair of planar coils. Mutual coupling between two planar coils is used as a measure of force applied to the magnetostrictive foil. In this type of force sensor, the output voltage is zero when force is zero, and the planar coils with electric wires can be put on and taken off easily because the magnetostrictive foil does not need a current contact. Basic characteristics of the force sensors are examined using Metglas2605SC amorphous foil glued to the side of an aluminun square bar of 15 mm × 15 mm cross-sectional area and a pair of 16-turn planar coils. Sensitivity was 38.4 mV/Nm [1.57 mV/με (ε;= δl/l] at the coil excitation condition of 1 MHz, 60 mA.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Issue number3
Publication statusPublished - Feb 1 2009

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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