Vibration detector
US5889731A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Oct 27, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/186
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vibration detector is disclosed. The vibration includes a ring (2) closed at its opposite ends by two ring ends (3, 4), that is externally covered with a sheath (11) made from an elastic material transparent to vibrations, two supporting plates (5) with a flexible central part (6) and a reinforced peripheral part (7) resting on the two ring ends. An inner cavity (8) between the two plates (5) is filled with liquid communicating through ports (10) and sheath (11) with the outside environment. Two sensitive elements (9) such as piezoelectric disks for example are fastened to the flexible central parts (6) on their faces of the interior of the cavity (8). The sensitive elements (9) are well protected from the outside environment and their sensitivity is not substantially influenced by variations in the static pressure. The invention has an application for detection of acoustic or seismic waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.