Method of calibrating a phased array ultrasonic system without known test object sound speed
US9952185B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2015 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Jun 3, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/4436
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The method of validating a calibration of a phased-array inspection instrument uses a calibration block having two reflectors located below an inspection surface at two different depths. The method comprises: obtaining angle reference data associating expected angles with corrected angles, each corrected angle being usable to propagate a phased-array beam into the calibration block at a true angle relative to the inspection surface that corresponds to the corresponding expected angle; propagating, from the inspection surface and targeting each one of the two reflectors, phased-array beams into the calibration block at a true angle using the angle reference data, and measuring echo signals associated with the propagated phased-array beams; determining time-of-flight values corresponding to the reflection of the phased-array beams on the two reflectors using the echo signals; and validating the calibration of the phased-array inspection instrument using the time-of-flight values, the two different depths and the true angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.