Apparatus and system for electrical power metering using digital integration
US6781361B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2002 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Apr 26, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/127
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.