Title:
APPARATUS AND SYSTEM FOR ELECTRICAL POWER METERING USING DIGITAL INTEGRATION
Document Type and Number:
WIPO Patent Application WO2002088761
Kind Code:
A3
Abstract:
A power metering system including a first modulator receiving a first analog voltage associated with a current and outputting a first digitized signal. A second modulator receives a second analog voltage and outputs a second digitized signal. A first lowpass filter filters out high frequency noise associated with the first signal and decimates the frequency of the first digitized signal. The first lowpass filter outputs a first filtered signal. An interpolator performs up sampling of the signal associated with the first filtered signal. The interpolator outputs a first up sampled signal. An integrator integrates the first up sampled signal. The integrator outputs an integrated signal. A first multiplier multiplies the second digitized signal and integrated signal, and outputs a multiplied signal. The multiplied signal being used to measure power.
Inventors:
NESTLER ERIC
Application Number:
PCT/US2002/013256
Publication Date:
April 03, 2003
Filing Date:
April 26, 2002
Export Citation:
Assignee:
ANALOG DEVICES INC (US)
International Classes:
G01R21/127; G01R21/133; (IPC1-7): G01R21/133; G01R21/127
Foreign References:
| DE19613732A1 | 1997-10-02 | |||
| US6058354A | 2000-05-02 | |||
| US5924051A | 1999-07-13 | |||
| US5311117A | 1994-05-10 | |||
| US6008635A | 1999-12-28 |
Download PDF:
Previous Patent: METHOD AND SYSTEM FOR MEASURING THE ENERGY OF A SIGNAL
Next Patent: METHOD AND DEVICE FOR CONTACLESS TESTING OF NON-FITTED ANTENNAE
Next Patent: METHOD AND DEVICE FOR CONTACLESS TESTING OF NON-FITTED ANTENNAE