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Fiberoptic pressure transducer

  • US 5,425,371 A
  • Filed: 10/28/1993
  • Issued: 06/20/1995
  • Est. Priority Date: 10/05/1992
  • Status: Expired due to Fees
First Claim
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1. A fiberoptic pressure transducer comprising:

  • a housing with a side wall;

    an opening in the wall extending into a cavity formed in the housing;

    a flexible L-shaped leaf structure having two legs, one leg being attached at one end to the wall and extending horizontally in a cantilevered fashion for a length over said cavity with the other leg extending vertically into the cavity;

    a flexible diaphragm covering the opening and contacting the horizontal leg of the cantilevered L-shaped leaf structure;

    a reflective surface on one side of the vertical leg of the L-shaped leaf structure that extends into the cavity;

    at least one fiberoptic rod mounted in the housing in spaced relationship with the reflective surface for transmitting light to and receiving light from the reflective surface such that when pressure is applied to the diaphragm, the vertical leg of the leaf structure is flexed inwardly into said cavity in response to the applied pressure and the spatial position of the reflective surface changes with respect to the at least one fiberoptic rod so as to change the amount of reflected light received by the at least one fiberoptic rod in proportion to the applied pressure; and

    means for adjusting the length of the horizontal leg of the L-shaped leaf structure that extends over the cavity to vary sensitivity of the pressure transducer.

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