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Magnetostrictive vehicle weight sensor

  • US 7,152,491 B2
  • Filed: 04/22/2005
  • Issued: 12/26/2006
  • Est. Priority Date: 04/22/2005
  • Status: Expired due to Fees
First Claim
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1. A vehicle seat weight sensor comprising:

  • a tubular inner wall defining a passageway for receiving a fastener therethrough;

    a fastener extending through the passageway, wherein the fastener preloads the inner wall; and

    at least one coil disposed adjacent the inner wall for measuring a stress applied to the inner wall to determine a weight on the inner wall, wherein the at least one coil includes an activation coil and a detection coil, the activation coil and the detection coil being separated by an annular divider between the activation coil and the detection coil extending radially outwardly from the tubular inner wall.

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