Capacitive non-contact voltage sensing method and apparatus
US11614469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2021 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | Dec 3, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A non-contact electric potential meter system to determine voltage between an AC conductor and a reference potential without direct electrical contact to the conductor. A housing provides a shielded measurement region that excludes other conductors and holds power supply means; an AC voltage sensing mechanism includes a conductive sense plate and an electrical connection to the reference potential. Waveform-sensing electronic circuitry obtains an AC voltage waveform induced by capacitive coupling between the conductor and the conductive sense plate. Capacitance-determining electronic circuitry obtains a scaling factor based on the coupling capacitance formed between the conductor and the conductive sense plate. Signal processing electronic circuitry uses the AC voltage waveform and the coupling capacitance-based scaling factor to obtain the voltage between the conductor and the reference potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.