Depth - GE Mentor Visual iQ Manual Del Usuario

Point to Line Point to Line
Measures the perpendicular distance between a line (defined by two points), and a selected point.
Measures the perpendicular distance between a line (defined by two points), and a selected point.
Example Applications: Example Applications:
• Turbine blade edge damage Turbine blade edge damage
•
• Estimate missing corner area using multiple point-to-line Estimate missing corner area using multiple point-to-line
•
measurements measurements
• Gap or groove width Gap or groove width
•
Weld width
• • Weld width
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Best Practices to Improve Measurement Accuracy: Best Practices to Improve Measurement Accuracy:
• Review the 3D point cloud to ensure your cursors are Review the 3D point cloud to ensure your cursors are
•
located correctly.
located correctly.
Check the point cloud to verify that the reference line is not
• Check the point cloud to verify that the reference line is not
•
tilted with respect to the reference edge on the part . This is
tilted with respect to the reference edge on the part. This is
especially important when both reference line cursors are
especially important when both reference line cursors are
on the same side of and away from the third cursor. on the same side of and away from the third cursor.
• Also check the point cloud to be sure the measured distance Also check the point cloud to be sure the measured distance
•
is not at a diagonal, which can give a higher-than-actual is not at a diagonal, which can give a higher-than-actual
result . result.
Use a Measurement Plane when red areas prevent proper
• Use a Measurement Plane when red areas prevent proper
•
cursor placement or 3D noise may be affecting the result .
cursor placement or 3D noise may be affecting the result.
See the Measurement Plane section for details.
See the Measurement Plane section for details.

Depth

Depth
Measures the distance from a reference plane (defined by three selected points) to a fourth selected point above or below the plane.
Measures the distance from a reference plane (defined by three selected points) to a fourth selected point above or below the plane.
Example Applications:
Example Applications:
• Blade tip to shroud gaps Blade tip to shroud gaps
•
Pits or dents from corrosion, erosion, or FOD impact
• • Pits or dents from corrosion, erosion, or FOD impact
Gap or groove width
• • Pipe inside diameter
Weld width
• Weld height •
• Stator vane rock • Stator vane rock
• Gap width • Gop width
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Best Practices to Improve Measurement Accuracy:
Best Practices to Improve Measurement Accuracy:
The measurement tip should be as close as possible to the
• The measurement tip should be as close as possible to the
•
indication to increase the accuracy of measurement .
indication to increase the accuracy of measurement.
When using 3D Phase Measurement , off-perpendicular views
• • When using 3D Phase Measurement, off-perpendicular views
yield the best results for depth measurements, especially when
yield the best results for depth measurements, especially when
measuring objects with shiny surfaces.
measuring objects with shiny surfaces.
The green Surface Mask visible when a reference plane cursor is
• • The green Surface Mask visible when a reference plane cursor is
active indicates points very close to the reference plane. Adjust active indicates points very close to the reference plane. Adjust
the cursor positions to maximize the amount of green on the the cursor positions to maximize the amount of green on the
reference surface. The 3D point cloud view can also be used to reference surface. The 3D point cloud view can also be used to
verify that the reference plane, indicated by a blue square, is verify that the reference plane, indicated by a blue square, is
accurately aligned with the reference surface. accurately aligned with the reference surface.
• After the third cursor is placed, the Depth Assist feature will After the third cursor is placed, the Depth Assist feature will
•
often automatically place the fourth cursor at the deepest often automatically place the fourth cursor at the deepest
point , highest point , or on a blade edge nearby. Check the
point, highest point, or on a blade edge nearby. Check the
position of the auto-placed cursor and adjust if necessary. position of the auto-placed cursor and adjust if necessary.
• Enable depth map mode in the point cloud view to better Enable depth map mode in the point cloud view to better
•
see surface contours and ensure that you are measuring the see surface contours and ensure that you are measuring the
desired point—often the highest or lowest on an indication—and
desired point—often the highest or lowest on an indication—and
that the indication clearly stands out from the 3D data noise. that the indication clearly stands out from the 3D data noise.
The line projected from the depth measurement point should
• • The line projected from the depth measurement point should
end near or within the triangle formed by the reference-plane end near or within the triangle formed by the reference-plane
cursors to minimize inaccuracy due to plane tilt.
cursors to minimize inaccuracy due to plane tilt.
If you must measure at a point far outside the reference
• • If you must measure at a point far outside the reference
triangle, increase the size of your reference triangle to
triangle, increase the size of your reference triangle to
compensate (this only applies to flat surfaces, not curved
compensate (this only applies to flat surfaces, not curved
surfaces).
surfaces).
• Use a Measurement Plane when measuring blade tip to shroud Use a Measurement Plane when measuring blade tip to shroud
•
clearance and red areas along the blade edge prevent proper clearance and red areas along the blade edge prevent proper
fourth cursor placement or 3D noise may be affecting the
fourth cursor placement or 3D noise may be affecting the
result. See the Measurement Plane section for details. result. See the Measurement Plane section for details.
VideoProbe 3D Measurement Handbook
VideoProbe 3D Measurement Handbook | 9
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