Phased Gratings Used in the Automated System of Ultrasonic Inspection of Disks
Source abstract
Abstract
The Canadian firm R/D Tech offers the Tomoscan Focus immersion system for the ultrasonic inspection of disks. The description of the system and performance characteristics of a scanner and a phased grating (PG) used as a probe are considered. The experiment has definitely proved that longitudinal waves from a circular PG can detect reflectors 0.4 mm in diameter at 1.5- and 50-mm depths if the signal-to-noise ratio is 14 and 24 dB, respectively. For a focusing piezoelectric transducer (PET), the signal-to-noise ratio was ∼10 dB. When sounding a linear PG with shear waves, a flaw of 0.8 mm in diameter was detected, the signal-to-noise ratio being ∼23.5 dB. The Tomoscan Focus system allows testing at a higher sensitivity.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ultrasonics and Acoustic Wave Propagation · Non-Destructive Testing Techniques · Surface Roughness and Optical Measurements
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (2)
Show source-provided references
1. Ermolov, M.N., Teoriya i praktika ul'trazvukovogo kontrolya (Theory and Practice of Ultrasonic Inspection), Moscow: Mashinostroenie, 1981.
2. Fal'kevich, S.A., Phased Gratings in Ultrasonic Flaw Detection, Defektoskopiya, 1984, no. 3, pp. 3–16.