Optimization of Magnetoelastic Torquemeter Designs

Tousignant, Xavier; Ménard, David

doi:10.1109/tmag.2020.3013147

Cited by 2 publications

(1 citation statement)

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“…First, in contactless current sensing [2] the two sensing spots are placed near the currentcarrying wire or bus bar engineered in a serpentine shape to enhance the field gradient [3], while rejecting the influence of unrelated nearby currents. Second, in torque sensing based on the magnetoelastic effect, multiple magnetometers are used to sense differentially the magnetic field from a shaft under torsion [4]. Given that the typical torque sensitivity is in the order of 10 μT/Nm, the Earth's magnetic field would induce a noticeable error without the differential configuration.…”

Section: Introductionmentioning

confidence: 99%

A Benchmark of Integrated Magnetometers and Magnetic Gradiometers

Brajon,

Gasparin,

2023

IEEE Access

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This survey paper compiles and benchmarks the performance of integrated magnetic sensors, in terms of their noise and full-scale magnetic field. In total, we collected performance metrics of 31 sensors realized in various technologies. For each sensor, we derived a noise model to estimate the noise under the same conditions. We obtained a comprehensive benchmark with a focus on integrated devices. We also measured the noise spectrum of 11 of those sensors to confirm our noise model. Given that for many emerging applications, such as tactile, current, torque and biomagnetic sensing, the signal of interest is the field gradient to reject magnetic stray fields, we extended the benchmark to gradiometers. We developed a low-noise measurement setup and a low-field gradient (full scale: 10 μT/mm) generation setup to characterize magnetic gradiometers in this regime. The paper discusses the key sensor trade-off between precision and range, and summarizes the technology trends graphically on a trade-off curve, providing broad insight.

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Section: Introductionmentioning

confidence: 99%