Glossary#

acquisition instrument#

Electronic device that allows the UT expert to control a probe and record the raw signals. When connected to computer, the instrument is the physical interface between the computer and the probe.

examination object#

Component examined in order to detect defects.

FMC#

Full Matrix Capture.

frame#

Set of timetraces obtained at a given position of the probes. An inspection is usually made of several frames. See also: Frame. Examples:

  • A FMC frame is a frame.

  • A FMC frame where one timetrace is missing is a frame but is not a FMC frame.

GCS#

Global Coordinate System. In the GCS, the default imaging plane is given by the equation $y=0$.

HMC#

Half Matrix Capture.

image#

Output of imaging algorithm. An image attempts to represent the examination object in such a way that the UT expert is able to confirm or invalidate the presence of a defect, or to characterize the defect. See also image array and image plot.

image array#

Internal representation of an image. An image array is given by scalar values (real or complex) on a regular grid (2D or 3D).

image plot#

Visual representation of an image array (i.e. a rectangular set of colored pixels). An image plot is always 2D.

image point#

Image point

imaging algorithm#

Set of operations which creates from one or more frames an image of the examination object.

index axis#

Axis normal to probe during an inspectiog, i.e. axis towards where the probe is transmitting.

MFMC#

Multi Frame Capture Format. File format.

multi-view TFM#

Variant of TFM

ndarray#

Multidimensional array. This is the base datatype provided by the library numpy to perform optimized operations on numeric data in Python. See also: numpy.ndarray.

PCS#

Probe Cordinate System. Warning: PCS does not refer to Probe Center Separation.

scan axis#

Axis along which the probe is moved during an inspection.

TFM#

Total Focusing Method.

timetrace#

Electrical signal over time obtained from exactly one transmitter and one receiver (possibly the same).

UT#

Ultrasonic testing. UT is a family technique of non-destructive testing based on the propagation of ultrasonic waves in the object or material tested.

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