Removal of earth's magnetic field effect on magnetoelastic resonance sensors by an antisymmetric bias field.

Sensors and actuators. A, Physical · 2012 · Benefit · Insufficient evidence

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BenefitInsufficient evidencePaper 3144

An antisymmetric magnetic bias field applied to a magnetostrictive ribbon reduced the influence of the earth's magnetic field on the sensor response by 77% compared with a conventional design.

Study snapshot

PublicationSensors and actuators. A, Physical · 2012

Study typeengineering

Reported directionBenefit

Evidence ratingInsufficient

Abstract

Magnetoelastic sensors are used in a wide field of wireless sensing applications. The sensing element is a low-cost magnetostrictive ribbon whose resonant frequency depends on the measured quantity. The accuracy of magnetoelastic sensors is limited by the fact that the resonant frequency is also affected by the earth's magnetic field. In this paper we present a technique to minimize this effect by applying an antisymmetric magnetic bias field to the ribbon. The ribbon's response to external perturbation fields was measured and compared to a conventional sensor design. Our results show that the influence of the earth's magnetic field could be reduced by 77%.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering

Effect directionbenefit

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

An antisymmetric magnetic bias field applied to a magnetostrictive ribbon reduced the influence of the earth's magnetic field on the sensor response by 77% compared with a conventional design.

Outcomes measured

Magnetoelastic resonance sensor resonant frequency sensitivity to earth's magnetic field
Reduction of earth magnetic field influence via antisymmetric magnetic bias field

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "earth's magnetic field",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Magnetoelastic resonance sensor resonant frequency sensitivity to earth's magnetic field",
    "Reduction of earth magnetic field influence via antisymmetric magnetic bias field"
  ],
  "main_findings": "An antisymmetric magnetic bias field applied to a magnetostrictive ribbon reduced the influence of the earth's magnetic field on the sensor response by 77% compared with a conventional design.",
  "effect_direction": "benefit",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "magnetoelastic sensors",
    "magnetostrictive ribbon",
    "resonant frequency",
    "earth's magnetic field",
    "antisymmetric magnetic bias field",
    "wireless sensing"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1016/j.sna.2012.05.013
PubMed: 23565035

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