Magnetostrictive-ring type torque sensor using two hall ICs with differential magnetic field detection

Hideo Muro, Munekatsu Shimada, Chihiro Saito, Yasubumi Furuya

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


A novel magnetostrictive-ring type torque sensor has been developed which used a new detection scheme for detecting the differential magnetic field and signal conditioning circuitry with the temperature drift compensation. Torque of a shaft was measured by detecting the leakage magnetic field emanating from the magnetostrictive-ring made of permendur Fe49Co49V2 which was attached to the stainless shaft. The magnetic sensor was constructed using a pair of commercial Hall ICs and a permalloy magnetic yoke embedded onto the circuit board. The temperature offset adjustment was accomplished by adding only four diodes and resistors to differential amplifiers. The measured sensitivity was 45 mV/Nm for the applied torque range from -4 Nm to +4 Nm.

Original languageEnglish
Article number6985022
Pages (from-to)412-415
Number of pages4
JournalProceedings of IEEE Sensors
Issue numberDecember
Publication statusPublished - 2014 Dec 12
Externally publishedYes
Event13th IEEE SENSORS Conference, SENSORS 2014 - Valencia, Spain
Duration: 2014 Nov 22014 Nov 5


  • Differential magnetic field
  • Hall IC
  • Magnetostrictive-ring
  • Temperature offset drift
  • Torque sensor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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