Meter apparatus and method for phase angle compensation...

Details Meter apparatus and method for phase angle compensation... Meter apparatus and method for phase angle compensation...

2005-12-13

2005-12-13

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Signal frequency or phase correction

C702S057000, C702S070000, C702S071000, C702S072000, C702S075000, C702S079000, C702S087000, C702S088000, C324S601000, C324S617000, C324S622000, C324S076110, C324S076120, C324S076520, C324S10300R

Reexamination Certificate

active

06975951

ABSTRACT:
A method compensates for phase differences between sampled values of first and second AC waveforms. The method employs a phase angle compensation factor and sequentially samples a plurality of values of each of the waveforms. For a positive compensation factor, second sampled values are adjusted to correspond with first sampled values by employing, for a corresponding second sampled value, a preceding second sampled value plus the product of: (i) the compensation factor and (ii) the difference between the corresponding second sampled value and the preceding second sampled value. Alternatively, for a negative compensation factor, the second sampled values are adjusted by employing, for the corresponding second sampled value, the preceding second sampled value minus the product of: (i) the sum of one plus the compensation factor and (ii) the difference between the preceding second sampled value and the second sampled value preceding the preceding second sampled value.

REFERENCES:
patent: 4996871 (1991-03-01), Romano
patent: 6043642 (2000-03-01), Martin et al.
patent: 6748344 (2004-06-01), Mendoza et al.

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