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Seat belt force or tension sensor with programmable hall effect sensor

  • US 20030060997A1
  • Filed: 06/27/2001
  • Published: 03/27/2003
  • Est. Priority Date: 06/27/2001
  • Status: Abandoned Application
First Claim
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1. A seat belt force or tension sensor comprising relatively movable first and second pieces, the pieces movable between a first position to a second position, at least one of the pieces operatively connected to a seat belt;

  • spring means for biasing the first and second pieces to the first position;

    at least one magnet located on and movable with one of the first and second pieces, the magnet generating a magnetic field;

    sensor means responsive to changes in the magnetic field resulting from the relative motion of the pieces for generating an output signal indicative thereof;

    compensating means for compensating for variances, from a nominal condition, of the component parts of the force sensor including variances in the spring means and magnet from respective nominal operating parameters for causing the output signal to follow a desired signature irrespective of the variances of the spring means and magnet.

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