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TomoView Concepts and Operational Mode > UT Settings Dialog Bar > Probe Tab

Probe Tab

The Probe tab (see Figure: The Probe tab) contains options that are used to set the parameters of the

probes used for the inspection.

Description of the Probe tab

Figure: The Probe tab

The Probe tab is subdivided into Material and Interface, Selection, Position , and Beam Orientation

group boxes.

Material and interface group box

Figure: The Material and Interface group box

Wave type

Allows you to select the wave type: Longitudinal or Transverse.

Sound velocity

Sets the sound velocity in the inspected material for each wave type. This value must be

determined with precision as it will be used to convert time units into distance units.

Wedge delay

Sets the total wedge delay of the probe. The wedge delay is calculated as follows:

Selection group box

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Figure: The Selection group box

Show total

Disables the probe and law parameters modification.

Modify probe

Allows you to modify the probe parameters.

Modify beam

Allows you to modify the beam parameters.

T/R radio buttons

When a Pulse-Echo group is selected, the T button transfers the pulse-receiver probe

parameters. When a Pitch-and-catch , or a TOFD group is selected, the T button transfers the

pulser probe parameters and the R button transfers the receiver probe parameters.

Position group box

Figure: The Position group box

Scan offset

The scan offset represents the distance between the beam direction and the scan origin, which

can be positive or negative (click on the button to view a graphical representation of this

offset). This box sets the scan offset of the probe or the beam depending on whether the

Modify probe or Modify beam option was chosen in the Selection group box. SeeFigure 4-64.

Index offset

The index offset represents the distance between the beam exit point and the index origin,

which can be positive or negative (click on the button to view a graphical representation

of this offset). This box sets the scan offset of the probe or the beam depending on whether the

Modify probe or Modify beam option was chosen in the Selection group box.

Separation

Specifies the distance between the probes (available only with an active TOFD group).

Parallel/perpendicular to beam radio buttons

Specifies the beam orientation as parallel or perpendicular to the scan direction (available only

with an active TOFD group).



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Adjust Resolution

This button opens the dialog box shown in Figure 4-65 which can be used to adjust the data

group resolution.

Sets the minimal offset difference, ensuring that there will be no data fusion among the

data groups, although acquisition gaps may occur.

Sets the minimal offset difference, ensuring that there will be no acquisition gap among

the data groups, although data fusion may occur.

Sets an average of the offset difference, therefore providing a good compromise between

acquisition gaps and data fusion among data groups.

Sets a user-defined offset difference, allowing you to select a data group resolution

between the minimum and maximum offset differences.

Figure: The Adjust Scan data group resolution dialog box

Beam orientation group box

Figure: The Beam orientation group box

Refracted angle

Defines the refracted angle of the probe beam.

The refracted angle (β) (see Figure: Refracted angle) is calculated from the probe incidence

angle (α), sound velocity in wedge, and sound velocity in material according to the following

formula (Snell’s law):

(1) Min.

(2) Max.

(3) Average

(4) User



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11 probe tab

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