Amplified shear transducer
US5948993A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1998 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Mar 2, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H11/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A 15 mode piezoelectric sensor with mechanical amplification is provided. e sensor consists of two piezoelectric members mounted on an electronically inert, rigid substrate. The two members have an electronically inert amplification device connected between them. When acoustic energy passes through the two members, they develop an electric charge which results in the upper ends of the members moving away from each other. Since the lower ends are anchored in the substrate, this causes a shearing response in the members. The shearing is amplified by the attached amplification device, yielding a strong piezoelectric response. In detection mode, incoming acoustic waves cause a mechanical flex in the attached amplification device. The flex of the amplification device causes a shearing response in the two attached piezoelectric members. This shearing causes a generation of electric charge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.