Controlling depoling and aging of piezoelectric transducers
US5643353A · kind A · utility
35Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1994 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | May 31, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K3/0607
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Depoling and aging of a piezoelectric transducers used at elevated temperatures is controlled by poling the transducer, applying a bias voltage in the same direction as the transducer is poled to maintain the piezoelectric transducer at an elevated potential, and applying a drive voltage having a lesser magnitude than the bias voltage to induce elastic strain in the transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.