Non-contact voltage measurement system using reference signal
US10139435B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2017 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Jul 20, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/2509
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods for measuring alternating current (AC) voltage of an insulated conductor (e.g., insulated wire) are provided, without requiring a galvanic connection between the conductor and a test electrode or probe. A non-galvanic contact (or “non-contact”) voltage measurement system includes a conductive sensor, an internal ground guard and a reference shield. A common mode reference voltage source is electrically coupled between the internal ground guard and the reference shield to generate an AC reference voltage which causes a reference current to pass through the conductive sensor. At least one processor receives a signal indicative of current flowing through the conductive sensor due to the AC reference voltage and the AC voltage in the insulated conductor, and determines the AC voltage in the insulated conductor based at least in part on the received signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.