Design and implementation of a Hall Effect sensor array applied to recycling hard drive magnets

Ryan J. Daniels, Timothy McIntyre, Roger Kisner, Stephen Killough, Roberto Lenarduzzi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Rare earths are an important resource for many electronic components and technologies. Examples abound including Neodymium magnets used in mobile devices and computer hard disk drives (HDDs) and in a variety of renewable energy technologies (e.g., wind turbines). More than 23,000 metric tons of Neodymium are processed annually; less than 1% is recycled. An economic system to assist in recycling magnet material from post-consumer goods, such as neodymium iron boron magnets commonly found in HDDs, is presented. A central component of this recycling measurement system uses an array of 128 Hall Effect sensors arranged in two columns to detect the magnetic flux lines orthogonal to the HDD. Results found using the system to scan planar shaped objects (e.g., HDDs) to identify and spatially locate rare earth magnets for removal and recycling from HDDs are presented. Other applications of the sensor array for identification and localization of magnetic components and assemblies are presented.

Original languageEnglish
Title of host publicationIEEE SoutheastCon 2015 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
EditionJune
ISBN (Electronic)9781467373005
DOIs
StatePublished - Jun 24 2015
EventIEEE SoutheastCon 2015 - Fort Lauderdale, United States
Duration: Apr 9 2015Apr 12 2015

Publication series

NameConference Proceedings - IEEE SOUTHEASTCON
NumberJune
Volume2015-June
ISSN (Print)1091-0050
ISSN (Electronic)1558-058X

Conference

ConferenceIEEE SoutheastCon 2015
Country/TerritoryUnited States
CityFort Lauderdale
Period04/9/1504/12/15

Keywords

  • Hall Effect sensors
  • hard drives
  • magnets

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