A Shell-Based Magnetic Field Model for Magnetic Proximity Detection Systems

Details

• Personal Author:
  Carr J ; Jobes, Christopher C. ; Li J
• Description:
  Several magnetic proximity detection systems have been developed for mining vehicles and mobile machinery to protect nearby workers. Magnetic field generators are often used in these systems to establish magnetic fields around the equipment. A sensor worn by a worker provides a measurement of the magnetic flux density that is used to estimate the proximity to the machine. The proximity detection systems currently available for underground mining equipment are capable of identifying whether a worker is near the machine. However, it is a challenge for these systems to accurately locate the worker. Mining machines, which have fast-moving, articulated parts, present hazards that change depending on the situation at hand as well as the specific location of the worker. In addition, the dynamic nature and confined spaces of the mining environment often demand that the workers be close to the machinery. Therefore, in many cases, simply knowing the proximity of a worker may be inadequate. To provide the most effective protection, it would be advantageous to know the worker's exact location relative to specific parts of the machine. To lay the foundation for measuring such a location, we have developed a shell-based model of the magnetic flux density distribution for a ferrite-cored generator. This paper will present an analysis of the model along with a model construction process. Also presented are the laboratory test results of a prototype system that implements this model to determine the exact location of a magnetic sensor using the fields from two generators. [Description provided by NIOSH]
• Subjects:
  Automobiles Coal Coal Mining Electric Injuries Electricity Magnetic Fields Manufacturing And Industrial Facilities Mining Occupational Health Safety Workplace

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• Keywords:
  Author Keywords: Magnetic Proximity Detection System Coal-mining Detectors Electrical-generators Electrical-hazards Equipment-design Machine-operation Magnetic-fields Magnetic-properties Magnetic Field Generator Mine-workers Mining-equipment Mining-industry Models Motor-vehicles Safety-equipment Shell-based Magnetic Flux Density Model Stop Zone Underground-mining Warning-devices Warning-systems Warning Zone Work-areas

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• Series:
  Mining Publications
• ISSN:
  0925-7535
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OMSHR - Office of Mine Safety and Health Research
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  463-471
• Volume:
  50
• Issue:
  3
• NIOSHTIC Number:
  nn:20040068
• Citation:
  Saf Sci 2012 Mar; 50(3):463-471
• Contact Point Address:
  Jingcheng Li, National Institute for Occupational Safety and Health, 626 Cochran's Mill Road, Pittsburgh, PA 15236, USA
• Email:
  Jingcheng.Li@cdc.hhs.gov
• Federal Fiscal Year:
  2012
• Peer Reviewed:
  True
• Source Full Name:
  Safety Science
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:84449ff5b4333f1de5f5f85792262711860d07ad41200b57ad7956b1f5b815981e950788a702fbe787ff045e02275ea60445163e686d92f103b1a57afff21040
• Download URL:
  https://stacks.cdc.gov/view/cdc/227396/cdc_227396_DS1.pdf
• File Type:
  [PDF - 1.29 MB ]