Method and apparatus for efficiently generating elastic waves with a transducer
US4248092A · kind A · utility
36Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1979 |
| Grant date | Feb 3, 1981 |
| Priority date | — |
| Expiry date | Apr 25, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0427
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method for generating an ultrasonic wave in a material, utilizing a transducer adapted to induce a higher than fundamental mode wave in the material and a signal generator adapted to drive the transducer at a frequency above the cutoff frequency below which the higher mode wave will not propagate. For a horizontal shear wave, optimal transducer efficiency is obtained by selecting a driven frequency between a minimum cutoff frequency f.sub.c =v.sub.s n/2t and an upper frequency sufficiently close to f.sub.c to drive the transducer with at least a preselected increase in efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.