Shielding Material Comparison for Electromagnetic Interference Mitigation for the Air Pump Motor of Personal Dust Monitors

Details

• Personal Author:
  Carr J ; DeGennaro C ; Li J ; McElhinney P ; Whisner B ; Zhou C
• Description:
  Since 2016, electromagnetic interference (EMI) of personal dust monitors (PDMs) with magnetic proximity detection systems (PDSs) has been observed in underground coal mines. The EMI causes the magnetic field measurements of a PDS to change, which, in turn, alters the calculated location of the miner relative to the machine. The search for EMI mitigation strategies led to the development and use of large shielding pouches and boxes to hold the entire PDM to reduce its magnetic emission. Research on these pouches and boxes found that although they were able to reduce the emitted radiation from the PDM, they also disturbed the magnetic field of the PDS, affecting its performance. Researchers from the National Institute for Occupational Safety and Health (NIOSH) have focused on shielding internal PDM components rather than shielding the entire PDM. The PDM air pump motor is one of the PDM components that has been identified as a major source of electromagnetic radiation and has been selected for further study and tests. The measurements show that a small copper or aluminum foil enclosure can effectively reduce the magnetic emission of the motor by between 50% and 85% at 73 kHz. This study compares the test results of the air pump motor with various shielding materials. [Description provided by NIOSH]
• Subjects:
  Dust Electrical Equipment And Supplies Mining Occupational Health Safety Safety Management
• Keywords:
  Coal Mines Detectors Dust Measurement Dusts Electromagnetic Interference Electronic Components Electronic Devices Emission Sources Equipment Reliability Equipment Testing Machinery Magnetic Fields Measurement Equipment Miners Mining Engineering Mining Equipment Monitors Performance Capability Performance Tests Proximity Detection Pumps Radiation Monitoring Radiation Monitors Radiation Shielding Radiation Shielding Materials Safety Monitoring Underground Mines Warning Devices Wearable Technologies

  More +
• Series:
  Mining Publications
• Publisher:
  Society for Mining, Metallurgy, and Exploration, Inc.
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Colorado ; New York ; OSHA Region 2 ; OSHA Region 3 ; OSHA Region 8 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PMRD - Pittsburgh Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-5
• NIOSHTIC Number:
  nn:20059782
• Citation:
  2019 SME Annual Meeting, February 24-27, 2019, Denver, Colorado, preprint 19-145. Englewood, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2019 Feb; :1-5
• Federal Fiscal Year:
  2019
• Peer Reviewed:
  False
• Source Full Name:
  2019 SME Annual Meeting, February 24-27, 2019, Denver, Colorado, preprint 19-145
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:faf0f68250998becd1625b47f6ab00a5ee0619dda3a5194861f8911e18205b1418dab7a5f6734ba2b52b09641e2e865f8025feb0db8b36543fd27a267fd604b5
• Download URL:
  https://stacks.cdc.gov/view/cdc/215237/cdc_215237_DS1.pdf
• File Type:
  [PDF - 434.88 KB ]