Dynamic and non-contact measurement of displacement or of permittivity by use of a capacitive sensor
US5990807A · kind A · utility
11Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1998 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Aug 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/263
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for dynamic and non-contact measurement of the displacement of a conductive substance with respect to a capacitive sensor formed by two parallel conductive plates, superimposed, electrically insulated from one another, and fed by a high frequency signal having a predetermined voltage, the capacitive sensor being connected to a device for detecting a current value. Also disclosed is a method for dynamic and non-contact measurement of the permittivity of a dielectric substance between a conductive part and a capacitive sensor of the above-mentioned type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.