Dual wall turbine blade ultrasonic wall thickness measurement technique
US7272529B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2005 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Jul 8, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B17/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus is provided to analyze a dual wall structure having at least one hollow core therein and having the same unknown material sound velocities in walls and in post as well. A transducer is located in at least two different positions with respect to the structure, whereby the transducer propagates an ultrasonic wave toward the dual wall structure. A portion of the ultrasonic wave is reflected back to the transducer. One wave traverses a portion of the dual wall structure that has a core filled with a medium having a known material acoustic property. A second wave traverses a portion of the post that has an unknown material sound velocity. From time of flight measurements of the above mentioned waves, the wall thickness and core shift, if any, can be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.