Industrial Tomography results
Industrial products
Section across encapsulated device
- Diameter of reconstruction : 85 mm
- Scanning step : 0.8 mm
- Number of projections : 60
The size of components inside the device and the bolt screw terminals may be clearly
observed in the cross section.
Magnetic transducer quick cross section
- Diameter of reconstruction : 98 mm
- Scanning step : 0.8 mm
- Number of projections : 60
The coils and the magnetic circuit of the device may be observed.
Section through honeycomb shaped ceramics object
- Diameter of reconstruction : 48 mm
- Scanning step : 0.8 mm
- Number of projections : 60
The scanned section reveals small changes in wall thickness, but no discontinuities or gaps.
Section through a steel bar
- Diameter of reconstruction : 66 mm
- Scanning step : 0.4 mm
- Number of projections : 60
The scanned section reveals high discontinuities and air gaps in the central zone,
caused by the casting process.
Cross section of 90 mm cage rotor of an asynchronous electric motor
- Length of reconstruction area : 110 mm
- Scanning step : 0.4 mm
- Number of projections : 60
Many large flows consisting in air bubbles resulting from the casting process may be seen.
Tomographic reconstruction is the only method able to obtain a cross section of this product.
3D tomogram of a casted object
- Number of planes : 30
- Scanning step : 0.4 mm
- Number of projections : 90
The high porosity of the outside surface makes difficult to analyze it by other investigating
methods. The 3D tomograms reveal high inside flows in the central part.
3D welded pipe tomographic reconstruction and a computerized NDT analysis example
- Number of reconstruction planes : 25
- Diameter of reconstruction : 50 mm
- Scanning step: 0.4 mm
- Number of projections: 90
The fineness of the 3D plot by the scales and drops of the weld is remarkable.
A high density material inclusion, possibly belonging to the welding electrode
and some internal caverns caused by the instability of the welding process may be observed.
Continuing the computerized investigation, a “software” cut of the weld and a magnification of
the cavities' zones is shown. A very interesting result is obtained when the
maximum flow dimensions need to be measured. In usual cases, this is made using the radial
projection on radiographic film.
In computerized tomographic analysis it is possible to measure not only the absolute dimension
and the flow size, but also to determine the shape and the volume of flow.
In NDT analysis, this means a fully computerized 3D control technique.
An interesting mode of representing a 3D tomogram of objects is by generating a programmed motion
of the object or of the observer. This is done by a special software algorithm for step by step
motion generation followed by automatic reconstruction of the image.
Here is an example of a 3D animation of a welded pipe.
36 successive images were computed from incremental view angles and then assembled together
in a short movie (397 Kbytes AVI file, it may take a while to be transferred).
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|| Tomography || Lab. 57 || ICPE S.A.
Last updated : August 6, 1998
Continuing the computerized investigation, a “software” cut of the weld and a magnification of
the cavities' zones is shown. A very interesting result is obtained when the
maximum flow dimensions need to be measured. In usual cases, this is made using the radial
projection on radiographic film.