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Optical set belt tension sensor

  • US 20060219029A1
  • Filed: 04/01/2005
  • Published: 10/05/2006
  • Est. Priority Date: 04/01/2005
  • Status: Active Grant
First Claim
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1. Apparatus for sensing tension in a seat belt, comprising:

  • an armature that is linearly displaced within a housing in relation to seat belt tension;

    an optical channel within said housing;

    means linearly displaced with said armature for varying an optical transmissivity of said optical channel in relation to the seat belt tension; and

    light emitter and light receiver elements disposed in said optical channel for sensing the optical transmissivity of said optical channel as an indication of the seat belt tension.

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