Automated utility meter reading system with variable...

Details Automated utility meter reading system with variable... Automated utility meter reading system with variable...

2006-07-18

2006-07-18

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S060000, C702S065000, C702S066000, C702S077000, C340S870020, C340S870040, C340S870050, C340S870060

Reexamination Certificate

active

07079962

ABSTRACT:
Methods and apparatus are disclosed for Automated Meter Reading (AMR) systems for determining quantities of a consumed utility product including electric, gas, and water service, using wireless data transfer. To compensate for the frequency drifts of the transmitters, these methods and apparatus, with minimum pre-processing of the received data, allow for on-the-fly adjustability of receiver bandwidth by merely changing a pre-calculated weighting function. As such, it is possible to use a fixed size Discrete Fourier Transform (DFT), or in particular a fixed N-point Fast Fourier Transform, for signals of different bandwidths.

REFERENCES:
patent: 6262672 (2001-07-01), Brooksby et al.
patent: 6934316 (2005-08-01), Cornwall et al.
patent: 2004/0263352 (2004-12-01), Cornwall et al.
patent: 2005/0024234 (2005-02-01), Brooksby et al.
patent: 2005/0179561 (2005-08-01), Osterloh et al.
Gumas, Charles Constantine, “Window-presumn FFT achieves high-dynamic range, resolution,”Personal Engineering&Instrumention News, Jul. 1997, pp. 58-64.

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