System and device for measuring voltage in a conductor
US8493053B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2009 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | Nov 23, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/0023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and device for measuring voltage in a conductor having a voltage provides a first electrode surrounding and spaced from the conductor, and a second electrode surrounding and spaced from both the conductor and the first electrode such that there is no contact between the conductor and the electrodes or between the first and second electrodes. The first electrode is connected to a first input of a differential amplifier circuit and the second electrode is connected to the other input of the differential amplifier circuit. The output of the differential amplifier circuit provides a voltage signal in proportion to the voltage of the conductor, thus providing a non-contact means for measuring the voltage of a conductor without requiring a connection to ground while simultaneously providing a high level of rejection of external interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.