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Belt force sensor

  • US 6,959,779 B2
  • Filed: 09/02/2003
  • Issued: 11/01/2005
  • Est. Priority Date: 01/24/2000
  • Status: Expired due to Fees
First Claim
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1. A method of differentiating between the presence of a human occupant and a child restraint seat in a motor vehicle, said method comprising the steps of;

  • sensing tension exerted on a seat belt with a sensor fixed along the seat belt;

    wherein the sensor includes a tensile section disposed between two belt loop sections, the tensile section including a strain gauge for sensing force on the seat belt;

    communicating the magnitude of the sensed tension to a controller;

    comparing the magnitude of tension to a predetermined tension; and

    determining that a child restraint seat is present if the sensed tension is greater than the predetermined tension.

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