NESTING DOLL DIMENSIONAL ANALYSIS
About the sample: Nesting doll
Nesting dolls also called matryoshka dolls are a set of wooden dolls of decreasing size placed one inside another. We don't believe that there is a huge demand to analyze these wooden dolls non-destructively, but a matryoshka is a good example to use to demonstrate the ability of dimensional analyses using X-ray CT (computed tomography). The largest set of matryoshka dolls is a 51-piece set hand-painted by Youlia Bereznitskaia (Russia) with the largest at 1 ft 9.25 in (53.97 cm) tall and the smallest at 0.125 in (0.31 cm) tall.
Analysis procedure
- In this example, a five-piece matryoshka was scanned using a micro-CT scanner, CT Lab HX.
- The external and internal surfaces were detected using the ISO-50 surface determination technique.
- The sizes of individual dolls were analyzed.
1. CT scan
A five-piece 3 1/4 inch (82 mm) tall matryoshka was scanned to produce the 3D grayscale CT image.
2. Surface detection
The X-ray CT cross-section reveals four dolls nested inside of the largest and most outer doll. The external and internal surfaces were detected using the ISO-50 surface determination technique.
3. Dimensional analysis
As shown in the figure, the height and diameter of each doll were measured without opening the nesting dolls.
Extra: 3D rendering
This video shows a 3D rendered view and cross-sections of the X-ray CT scan collected on the matryoshka doll used in this example.
More Metrology Application Examples
Watch an on-demand webinar about X-ray CT metrology applications.
Bottlecap air gap analysis
Application Note
Golf ball layer thickness analysis
Application Note
Nesting doll dimensional analysis
Application Note
Plastic parts quality control and reverse engineering
Application Note
Water flosser tip stress simulation
Application Note
3D printed plastic dimensional analysis
Application Note
Aluminum die casting void analysis
Application Note
Aluminum part dimensional analysis
Application Note & Video
Plastic Locking Parts Dimensional Comparison
Application Note