DMTA-10055-01EN, Rev. A, February 2015
Appendix C
326
Peaking Memory A software function that records an echo envelope as the
transducer scans across a test piece by capturing and
storing on the screen the peak echo amplitude at each
pixel location
Peaking up Maximizing the height of a displayed indication by
optimizing the position of the sound beam.
Penetration The ability of the test system to overcome signal
amplitude loss across a sound path due to factors like
attenuation, scattering, and beam spreading.
Piezoelectric
materials
A family of materials (such as quartz, lead metaniobate
and lead zirconium titanate) that possess the characteristic
ability to produce a voltage differential across their faces
when deformed by an externally applied mechanical force,
and a change in their own physical configuration
(dimensions) when an external voltage is applied to them.
Pitch-catch A test method which utilizes separate transmitting and
receiving transducers on the same side of the test piece.
Probe In ultrasonic testing, an alternate name for transducer.
Pulse repetition
frequency (PRF)
The frequency at which an instrument generates an
excitation pulse and initiates a data acquisition cycle. Also
known as Pulse Repetition Rate.
Range The total distance represented by the horizontal display
axis.
Receiver The circuits a flaw detector that receive and process
returning echoes (as voltages) from the transducer. Typical
signal processing includes amplification, filtering, and
rectification.
Table 32 Glossary (continued)
Term Definition
To Next Page
Loading...
