Supersonic wave flaw detecting apparatus
US3996792A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1975 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Jul 1, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S73/90
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A supersonic or ultrasonic wave flaw detector in which acoustic boundaries of flaws and/or abnormality of materials within an object to be inspected is detected by supersonic or ultrasonic waves and the position and shape of such a flaw and/or abnormality are displayed. A hard object to be inspected is sector-scanned with a supersonic wave beam with a variable-angle beam probe in direct contact with the object. In a range of comparatively small incident angles at which the longitudinal wave mainly penetrates the object, sectional images due to echo signals of the longitudinal wave are displayed on a display screen with scanning lines representative of the transmission speed and direction of the longitudinal wave. In the range of large incident angles where the shear wave penetrates the object, on the other hand, sectional images due to the echo signals of the shear wave are displayed on the display screen with scanning lines representative of the transmission speed and direction of the shear wave. For this, the sweeping speed and direction for the display scanning lines are switched in accordance with the ranges of incident angles. The switched flaw detecting operation modes of lon…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.