Noncontact magnetic torque sensor

Miyashita, K.; Takahashi, T.; Kawamata, S.; Morinaga, Shuta; Hoshi, Y.

doi:10.1109/20.104446

Cited by 15 publications

(8 citation statements)

References 1 publication

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“…A vast variety of torque sensors has been realized up to now [119][120][121][122][123][124][125][126][127][128][129]. One principle is the use of pre-annealed magnetic materials under torsion.…”

Section: Sensors Based On Magnetic Effects and Materialsmentioning

confidence: 99%

Magnetostrictive delay lines: engineering theory and sensing applications

Hristoforou

2003

Meas. Sci. Technol.

113

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A review of the engineering theory and the sensing element applications of the magnetostrictive delay line (MDL) technique is presented. The state of the art of magnetic materials and effects used in sensor design is overviewed and the operation of MDLs and their basic engineering properties are discussed. The resulting position, stress and field sensors based on this technique as well as their most significant applications are demonstrated. Finally, the industrialization process and the integration of the sensors with electronic circuitry as well as their evaluation with respect to the state of the art are discussed.

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Section: Sensors Based On Magnetic Effects and Materialsmentioning

confidence: 99%

Magnetostrictive delay lines: engineering theory and sensing applications

Hristoforou

2003

Meas. Sci. Technol.

113

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“…[1,2] They are also widely used to measure distance, and angler positions, [3,4] wheel speed of rotation [5], etc. Kunio Miyashita et al [6] designed a non-contact magnetic torque sensor with sinusoidal output waveforms, two MR elements (R 1 ; R 2 ) or (R 4 ; R 3 ) groups with a phase difference of P/2 to each other are arranged into a three-terminal circuit to reduce the third harmonic components, two MR elements (R 11 ; R 12 ) or (R 21 ; R 22 ) groups with a phase difference of P/6 to each other are arranged into R 1 ; R 2 ; respectively. P is half-wavelength of a periodic magnetic field H ex .…”

Section: Introductionmentioning

confidence: 98%

Design of output voltage waveform on magnetic encoder

Zhang

Jiang

et al. 2004

Journal of Magnetism and Magnetic Materials

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“…A non-contact method for torque estimation would improve on the conventional approaches and provide a robust method of torque measurement. Non-contact methods for torque sensing have been explored but are limited due to sensitivity and calibration issues [3][4][5]. An additional desirable attribute for a torque sensing system is the ability to retrofit to existing shafts in the field.…”

Section: Introductionmentioning

confidence: 99%

Development of Galfenol Based Non-Contact Torque Sensor

Purekar¹,

Ragunath²,

Flatau³

et al. 2012

53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

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A retro-fit capable non-contact torque sensor concept is developed and demonstrated in bench-top testing. Galfenol, an iron gallium alloy exhibiting magnetostrictive behavior is bonded to the shaft as a sensing element. The magnetic flux density in the Galfenol patch is affected by stresses induced from the torque of the shaft. Sensor elements consisting of Hall effect sensors and pick-up coils are mounted in the non-rotating frame are used to monitor the magnetic field in the Galfenol patch. Non-rotating tests are conducted for calibration purpose. Rotating tests are conducted at low RPM and low HP up to 1800 RPM and 3.6 HP.

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Noncontact magnetic torque sensor

Cited by 15 publications

References 1 publication

Magnetostrictive delay lines: engineering theory and sensing applications

Magnetostrictive delay lines: engineering theory and sensing applications

Design of output voltage waveform on magnetic encoder

Development of Galfenol Based Non-Contact Torque Sensor

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