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Magnetic structure for detecting a relative motion between the magnetic structure and a magnetic field sensor

  • US 7,859,253 B2
  • Filed: 06/26/2008
  • Issued: 12/28/2010
  • Est. Priority Date: 06/29/2007
  • Status: Active Grant
First Claim
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1. A magnetic structure for detecting a relative motion between the magnetic structure and a magnetic field sensor, the magnetic structure comprising at least two permanent magnets whereinthe permanent magnets are arranged along a predetermined line at a predetermined distance g from each other,the permanent magnets are magnetized in the direction of the line,adjacent permanent magnets have an opposite direction of magnetization, andthe distance g fulfills the two conditions g≧

  • 0.25*lmin and g≦

    4*lmax, with the quantity lmin designating a length of the shortest of the permanent magnets as measured along the line and the quantity lmax a length of the longest of the permanent magnets as measured along the line.

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