Crack detection using resonant ultrasound spectroscopy
US5351543A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1991 |
| Grant date | Oct 4, 1994 |
| Priority date | — |
| Expiry date | Dec 27, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0289
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus are provided for detecting crack-like flaws in components. A plurality of exciting frequencies are generated and applied to a component in a dry condition to obtain a first ultrasonic spectrum of the component. The component is then wet with a selected liquid to penetrate any crack-like flaws in the component. The plurality of exciting frequencies are again applied to the component and a second ultrasonic spectrum of the component is obtained. The wet and dry ultrasonic spectra are then analyzed to determine the second harmonic components in each of the ultrasonic resonance spectra and the second harmonic components are compared to ascertain the presence of crack-like flaws in the component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.