High-precision measuring method and apparatus

Details High-precision measuring method and apparatus High-precision measuring method and apparatus

2005-02-15

2005-02-15

Patidar, Jay (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

C324S644000, C324S637000, C073S602000, C342S086000

Reexamination Certificate

active

06856141

ABSTRACT:
A method and apparatus of measuring a predetermined parameter having a known relation to the transit time of movement of an energy wave through a medium, by transmitting from a first location in the medium a cyclically-repeating energy wave; receiving the cyclically-repeating energy wave at a second location in the medium; detecting a predetermined fiducial point in the cyclically-repeating energy wave received at the second location; continuously changing the frequency of transmission of the cyclically-repeating energy wave from the first location to the second location in accordance with the detected fiducial point of each received cyclically-repeating energy wave received at the second location such that the number of waves received at the second location from the first location is a whole integer; and utilizing the change in frequency to produce a measurement of the predetermined parameter.

REFERENCES:
patent: 4315260 (1982-02-01), Kupfer

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