Method and device for testing electrically conducting objects by means of ultra-sonics
US4689996A · kind A · utility
10Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1985 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | Apr 4, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/048
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The subject of the invention is a method and device for non-destructive testing of electrically conducting objects (10) by means of penetrating ultra-sonic waves, whereby the ultra-sonics signals are electro-dynamically generated. While being tested the object is located in a magnetic field. The probes (30, 32) arranged on diametrically opposite sides of the object (10) are set at the smallest possible constantly maintained distance from the surface. The signals used for detecting the flaw are corrected so that any variations in the thickness of the object (10) in the area of the probes (30, 32) are taken into account.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.