Method of determining acoustic transit times for material having high acoustic attenuation properties
US8276431B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2008 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Nov 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0422
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining time a single transit of an acoustic wave through a test material using a calibration material having known acoustic velocity characteristics and an acoustic pitch-catch system with a signal recorder for recording a received signal as a function of time. The system includes a first configuration for transmission of acoustic shear waves and a second configuration for transmission of acoustic longitudinal waves. In the first configuration, a first acoustic zero is determined when the acoustic shear waves are applied to the calibration material. In its second configuration, a second acoustic zero is determined when the acoustic longitudinal waves are applied to the calibration material. Each configuration is coupled to a test material with the respective first and second acoustic zeroes identified on the recorder. The signal recorder determines a single transit time for the acoustic waves through the test material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.