Pulse-echo acoustic transducer
US9050628B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2013 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Jan 26, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/8548
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A piezoceramic pulse-echo acoustic transducer includes protection layers for the piezoceramic that are tuned to the piezoceramic so as to optimize pulse-echo signal response (i.e. greater output signal bandwidth and increased return signal sensitivity). The protection layers are tuned to the piezoceramic via material selection and thickness. The acoustic transducer has a backing, a piezoceramic adjacent the backing, an intermediate protection layer adjacent the piezoceramic, and a front protection layer adjacent the intermediate protection layer and opposite the piezoceramic. The front and intermediate protection layers are tuned to the piezoceramic via their acoustic impedance such that the acoustic impedance of the intermediate layer is greater than the acoustic impedance of the piezoceramic and of the front protection layer. The acoustic impedance of the front protection layer is less than the acoustic impedance of the piezoceramic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.