Measurements 1. Depth of dent or gouge
- maximum y distance from the projected parent surface found in
the scan, shown as
"Min"
in data table. Surface projection is made by calculating a least-squares
curve fit using the left and right portions of the scan. This allows
the program to work on both flat and curved surfaces.
2.
Width of dent or gouge - distance between the two edges of the feature.
Edges may be determined by the extent of change or decline in the profile
below the projected surface.
Industry Examples 1. Defense - measurement
of foreign object damage to coated surfaces.
2. Space - inspection of
gouges to external surfaces.
3. Factory - measurement
and tracking of machined grooves.
Sensors
and Controllers Sensor selection will be
dependent on the size of the part, the size of dent or gouge and on the
resolution required. Any of the sensors and controllers could be
used for this application. Sensor stand-off's that fit over the part
or guide the sensor into the correct measurement position would be important
to the ease of use and repeatability of results.