Acoustic transducer
US5339292A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1992 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Sep 28, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H11/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A piezoelectric acoustic transducer for coupling acoustic energy to a gaseous atmosphere in a pulse-echo ranging system has a tubular housing closed at one end by a thin integral wall to which a radiating plate of a transducer assembly is coupled to radiate acoustic energy by means of a layer of acoustically transmissive matching material. The transducer assembly except for its radiating surfaces is wrapped in an acoustic decoupling material such as cork, and the side wall of the tubular housing, which has a mounting ring behind the transducer assembly, is also internally lined with such material, space around and behind the transducer assembly within the housing being filled with a slightly elastomeric potting compound. This arrangement decouples the mounting ring from the transducer assembly, thus stabilizing the ringing characteristics of the transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.