Measuring device for dielectric constant determination
US10983069B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2018 |
| Grant date | Apr 20, 2021 |
| Priority date | — |
| Expiry date | Jun 4, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N22/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure relates to a measuring device for measuring a dielectric constant of fill substances in containers. The measuring device includes: a transmitting circuit for transmitting a first electromagnetic high-frequency signal and a second electromagnetic high-frequency signal; a receiving circuit for receiving the two high-frequency signals; and an evaluation circuit to ascertain a first phase shift between the transmitting and the receiving of the first high-frequency signal, to ascertain a second phase shift between the transmitting and the receiving of the second high-frequency signal, and to ascertain an amplitude of one of the received high-frequency signals. Based on these three values, the dielectric constant is determined. By determining phase shift at different frequencies, it is possible according to the present disclosure, especially in the case of solid-type fill substances, to determine their dielectric constant uncorrupted, thus without influence of air inclusions or moisture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.