Center-mount capacitive sensor with overload protection
US6718827B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Nov 15, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/0618
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacitive sensor includes an elastic member extending about a central axis, having a central region, a peripheral region, a first side, and a second side. An overpressure stop member has an inner surface and an outer surface. The inner surface of the overpressure stop member has a contour adapted to limit deflection of the elastic member caused by a differential pressure between the two regions across the elastic member. The outer surface of the overpressure stop member has an first electrically conductive region. A second plate is spaced apart from the outer surface of the overpressure stop member, and being connected to the central region of the elastic member by a post, wherein the post transfers deformation of the elastic member caused by differential pressure across the elastic member to movement of the second plate along the central axis. The second plate has a second electrically conductive region opposite the first electrically conductive region, wherein the first electrically conductive region and the second electrically conductive region form a capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.