Device for measurement of electrical energy comprising a multiplexer
US5545981A · kind A · utility
12Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1995 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | May 19, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/1331
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measurement of electrical energy having current and voltage sensors 1, 2, a multiplexing circuit 8 and an analogue to digital converter 11. A microprocessor 9 controls the multiplexing circuit in order to supply the current and voltage signals alternately to the converter 11, the microprocessor 9 calculating the electrical energy at a moment in time using two values of the voltage situated around a current sample and using three samples of the current. By these means the time delay between samples of the voltage and current can be corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.