Bore probe for tube inspection with guided waves and method therefor
US5734588A · kind A · utility
29Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1996 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Jun 24, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2636
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Guided ultrasonic waves are used for the detection of defective tubes in a heat exchanger or steam generator by using a transducer which generates a guided wave at predetermined parameters of phase velocity and frequency to operate at a point on a dispersion curve which minimizes leakage of ultrasonic energy to fluid surrounding the tube. Various techniques of generating ultrasonic waves of various phase velocities such as a comb type filter allow phase velocity points on a dispersion curve to be freely selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.