Ultrasonic test method and apparatus for testing thick-walled workpieces
US3999422A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | May 8, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns an apparatus and method for ultrasonically testing thick-walled workpieces at an increased scanning speed by the use of a plurality of ultrasonic test probes wherein the probes are selectively rendered operable. The transmit probes are temporarily inhibited from transmitting search signals into the workpiece for a time interval during which the receipt of a defect responsive echo signal by a receive transducer is anticipated. The scan frequency is determined therefore by a clock circuit and the transmission of search signals is halted only temporarily for a brief period during which time there is no skipping in the predetermined transmitting sequence of the transducer probes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.