A wireless device for measuring hand-applied forces.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference · 2004 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3611

Study snapshot

PublicationConference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference · 2004

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

We report on a wireless, electromyography (EMG)-based, force-measuring system developed to quantify hand-applied loads without interfering with grasping function. A portable surface EMG device detects and converts to voltage output biopotentials generated by muscle contractions in the forearm and upper arm during hand-gripping and traction activities. After amplifying and bandpass filtering, our radio frequency (RF)-based design operating at approximately 916 MHz wirelessly transmits those voltages to a data acquisition (DAQ) system up to 20 meters away. A separate calibration system is used to relate an individual user's EMG signal to known pull and clenching forces during specific applications. Real-time EMG data is processed and displayed in software developed with LabView (National Instruments, Austin, TX). Data is then converted to force data using individual calibration curves. With EMG electrodes placed over any major forearm muscle, calibration curves for seven subjects demonstrated linearity (R(2) > 0.9) and repeatability (<10% of average slope) to 110 newtons (N). Preliminary results in clinical application on newborn delivery suggest that this approach may be effective in providing an unobtrusive and accurate method of measuring hand-applied forces in applications such as rehabilitation and training.

Machine Enhanced Logic

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 directionunclear

PopulationNot supplied

Sample size7

ExposureRF · 916 MHz

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

An RF-based wireless EMG force-measuring system operating at approximately 916 MHz transmitted EMG-derived voltages to a DAQ system up to 20 m away. Calibration curves for seven subjects showed linearity (R^2 > 0.9) and repeatability (<10% of average slope) up to 110 N; preliminary clinical application in newborn delivery suggested the approach may be effective for unobtrusive force measurement.

Outcomes measured

Device performance (linearity of calibration curves)
Device performance (repeatability)
Force measurement up to 110 N
Wireless transmission range (up to 20 m)
Preliminary clinical application in newborn delivery (feasibility)

Limitations

No health effects were assessed; the RF component is part of a device design description.
Sample size for calibration was seven subjects.
Clinical application results are described as preliminary without quantitative outcomes in the abstract.

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": "wireless device",
    "frequency_mhz": 916,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": 7,
  "outcomes": [
    "Device performance (linearity of calibration curves)",
    "Device performance (repeatability)",
    "Force measurement up to 110 N",
    "Wireless transmission range (up to 20 m)",
    "Preliminary clinical application in newborn delivery (feasibility)"
  ],
  "main_findings": "An RF-based wireless EMG force-measuring system operating at approximately 916 MHz transmitted EMG-derived voltages to a DAQ system up to 20 m away. Calibration curves for seven subjects showed linearity (R^2 > 0.9) and repeatability (<10% of average slope) up to 110 N; preliminary clinical application in newborn delivery suggested the approach may be effective for unobtrusive force measurement.",
  "effect_direction": "unclear",
  "limitations": [
    "No health effects were assessed; the RF component is part of a device design description.",
    "Sample size for calibration was seven subjects.",
    "Clinical application results are described as preliminary without quantitative outcomes in the abstract."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "wireless",
    "electromyography",
    "EMG",
    "force measurement",
    "hand-applied forces",
    "radio frequency",
    "916 MHz",
    "biopotentials",
    "calibration",
    "LabView"
  ],
  "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: 10.1109/iembs.2004.1403622
PubMed: 17272142

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