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Method and apparatus for making high-precision measurements

  • US 6,984,993 B2
  • Filed: 06/03/2004
  • Issued: 01/10/2006
  • Est. Priority Date: 04/28/1999
  • Status: Expired due to Fees
First Claim
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1. A method of measuring a predetermined parameter, comprising:

  • mounting a displaceable sensor on a mounting member such that the displaceable sensor changes its location, form or length with respect to said mounting member in accordance with said predetermined parameter;

    transmitting a cyclically-repeating energy wave through a transmission channel to or in said displaceable sensor;

    receiving said cyclically-repeating energy wave transmitted through said transmission channel to or in said displaceable sensor;

    continuously changing the frequency of transmission of the cyclically-repeating energy wave in accordance with changes in said predetermined parameter such that the number of waves received is a whole integer;

    and utilizing the change in frequency to produce a measurement of said predetermined parameter.

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