Acceleration sensor
US6766690B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 2003 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | May 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/0922
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An acceleration sensor includes a sensing element and a pair of supporting members for supporting the sensing element at one end in the longitudinal direction thereof. The sensing element includes four laminated piezoelectric layers, and electrodes are provided at the center in the thickness direction of the sensing element, between a pair of first layers and a pair of second layers, and on the outer surfaces of the pair of second layers. Cells formed by the first and second layers at each side of the center in the thickness direction are electrically connected in parallel. The pair of first layers preferably have substantially the same thickness and the pair of second layers preferably have substantially the same thickness, and the ratio of the thickness T1 of each first layer to the total thickness T2 of each first and second layer is about 62% to about 76%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.