Ultrasonic nondestructive testing method
US4253337A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 1979 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Aug 8, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0428
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method for evaluating a discontinuity in an object. As used to measure the depth of a surface discontinuity in a plate type of object, the method includes the steps of generating a horizontally polarized shear wave in the object directed substantially along the axis of the discontinuity, passing the generated wave through an aperture to diffract the wave prior to its arrival at the discontinuity, detecting the wave after it has propagated through the discontinuity, and calculating the depth of the discontinuity by correlating the phase and amplitude of the detected wave to the phase and amplitude of a similar wave propagated in a region of the object which is free of discontinuities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.