QWaygate _ Technologies a Baker Hughes business Real3D™ Measurement Handbook A guide to advanced 3D measurement technologies, techniques and applications for video borescopes used in remote visual inspection applications.

Measurement Technologies

Advances in image based 3D measurement are making the video borescope an increasingly powerful tool in the inspector’s toolbox. While in the past, you could identify indications and capture images; today’s advanced video borescopes allow you to map, measure, and analyze indications in 3D. This guide is designed to help inspectors and asset owners understand measurement technologies available on the Mentor Visual iQ and how they can be properly applied to improve decision making in remote visual inspection applications. Many video borescope owners underutilize the advanced features of their inspection...

Measurement Technologies (See Mentor Visual iQ VideoProbeTM Operating Manual – Advantages of Measurement Types) Using patented structured-light technology, 3D Phase Measurement enables inspectors to locate, measure, and analyze an indication using the same tip optic. The wide field of view and large depth of field allow for measuring with the same tips used for inspecting, thus eliminating the extra steps required to back out, change the tip, and then relocate the indication. 3D Phase Measurement provides accurate measurement “on-demand” while saving time and increasing overall inspection productivity....

Two main things to consider when selecting a 3DPM tip are from what direction the defect is viewed and from how far away. To determine whether you need a forward view or side view tip, consider where your insertion point is in relation to the area you're inspecting. Measurement Depth of Field (DOF) values are provided as general guidelines to help select the most appropriate tip for a given application. The actual measurement DOF for a particular application depends on several factors including feature size, required accuracy, measurement types and surface finish.

Side View Tip Specs Optical Measurement Blue, Green and Red side view tips comparison chart. Note: Green tip view is tilted up 10 degrees to improve turbine blade root visibility Color Measurement view size at max distance Part Number

General Guidelines • nsure the inspector is qualified to perform measurement. E • Use in-house procedures and the selector tool on this page to choose the appropriate measurement technology and type for your application. • nsure that your measurement tip and probe optics are clean and that the tip is securely attached. If using a stereo tip, be sure to correctly E identify the tip serial number when first entering measurement. 3D Phase Measurement tips are automatically recognized by the system. • For best results when measuring on a narrow surface using 3DPM, orient the tip such that the long...

Choose the Right Measurement Type For Your Application While multiple measurement types may be used for certain applications, this chart is intended to show the expert recommendation. Length • Simple measurement of features or components Point to Line • Turbine blade edge damage • Gap width • Weld width Depth • Pits or dents from corrosion, erosion, or FOD impact • Pipe inside diameter • Weld height • Gap width Area Depth Profile • Corrosion, erosion and pitting • Maximum weld height • Maximum wear groove depth Angle • Angle on flat surfaces Surface Angle • Blade tip curl • Angle between two...

Measurement Types This section will detail each of the measurement types available on the Mentor Visual iQ VideoProbe, suggest applications where each technique can be most effective, and provide tips and suggestions for accurate measurement setup. Measures the straight-line distance between two selected cursor points. Example Applications: • Simple measurement of features or components When enabled in Settings, a blue mask will highlight surface points where planes perpendicular to the straight length 3D line between the cursor points intersect the viewed surface. • Indication length measurement...

Example Applications: • Turbine blade edge damage • Estimate missing corner area using multiple point-to-line measurements • Gap or groove width • Weld width 3D Surface Mask: When enabled in Settings, a blue mask will highlight surface points where planes perpendicular to the straight 3D line between the third cursor point and the reference line intersect the viewed surface. Best Practices to Improve Measurement Accuracy: • Review the 3D point cloud to ensure your cursors are located correctly. • Space the first two cursors far apart along the reference edge. If possible, place them on opposite...

Measures the distance from a reference plane (defined by three selected points) to a fourth selected point above or below the plane. Example Applications: Best Practices to Improve Measurement Accuracy: • Blade tip to shroud gaps • he measurement tip should be as close as possible to the T indication to increase the accuracy of measurement. • Pits or dents from corrosion, erosion, or FOD impact • Pipe inside diameter • Weld height • Stator vane rock • Gap width • osition the three reference-plane cursors to maximize the P coverage of 3D Surface Mask green pixels on the reference surface. If measuring...

0 Multi-segment Measures a planar area on a surface by outlining an indication with multiple cursor points. Example Applications: • Missing blade corners using a Measurement Plane • Coating loss • Surface area of pitting or corrosion • FOD impact damage Best Practices to Improve Measurement Accuracy: • Check the point cloud to ensure accurate cursor placement. • When measuring a curved surface, reduce error by measuring multiple smaller areas and combining the results. • Use with a Measurement Plane to measure area and lengths of blade missing corners. See Measurement Plane section for details....