Method and apparatus for making high-precision measurements

Details Method and apparatus for making high-precision measurements Method and apparatus for making high-precision measurements

2006-01-10

2006-01-10

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

C324S698000, C324S204000, C324S442000, C073S053050, C600S430000

Reexamination Certificate

active

06984993

ABSTRACT:
A method and apparatus for measuring a predetermined parameter, by providing a displaceable sensor on a mounting member such that the displaceable sensor changes in location, form or length with respect to the mounting member in accordance with the predetermined parameter. A cyclically-repeating energy wave is transmitted to or through the displaceable sensor, and a predetermined fiducial point in the received cyclically-repeating energy wave is detected and used for continuously changing the frequency of the transmitted cyclically-repeating energy wave such that the number of waves received is a whole integer. The change in frequency is used to produce a measurement of the predetermined parameter. Several embodiments are described wherein the displaceable sensor is a deformable membrane, an end wall of a bellows, a spring-mounted member, a displaceable plunger, and a bar changing its length in accordance with the parameter to be measured.

REFERENCES:
patent: 5841274 (1998-11-01), Masreliez et al.
patent: 6577112 (2003-06-01), Lvovich et al.
patent: 6861851 (2005-03-01), Lvovich et al.

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