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Passive magnetic field sensors having magnetostrictive and piezoelectric materials

  • US 6,809,516 B1
  • Filed: 04/05/2000
  • Issued: 10/26/2004
  • Est. Priority Date: 04/05/1999
  • Status: Expired due to Fees
First Claim
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1. A magnetic field sensor comprising a magnetostrictive material in contact with a piezoelectric material, the magnetostrictive material straining in response to a magnetic field and imparting stress to the piezoelectric material to produce a detectable voltage signal, the magnetic field sensor comprising at least one rod or fiber of a first one of the magnetostrictive and piezoelectric materials, and a matrix of the second one of the magnetostrictive and piezoelectric material surrounding the at least one rod or fiber.

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