Capacitive sensor for measuring a displacement
US4841225A · kind A · utility
27Cited by
5References
2Claims
0Family size
Inventor
Key dates
| Filing date | Sep 28, 1987 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Sep 28, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2415
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacitive sensor for measuring a displacement comprises a slide carrying groups of emitting electrodes (1 to 32) disposed facing receiving electrodes (51 and 52) carried by a scale. A periodic configuration of signals is applied to the emitting electrodes by electronic circuits (60 to 65h) which permit a separate switching of each group of electrodes. There is thus obtained a more precise definition of the signals received by the receiving electrodes situated facing the scale and thus a greater precision of the measurement of displacements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.