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technology takes photogrammetry
underwater and without the need
for adhesive targeting. For use
in areas previously thought to be
inaccessible such as spent fuel pools,
jet pumps, core spray, etc., the
housing and cabling for the camera
has been designed specifically for
these environments. Typically, this
technique is accurate to ± 0.015”.
• Laser tracking – Laser tracking
uses servo motors and encoders to
accurately “track” a mirrored prism.
The system has the ability to collect
measurement data on the “tracked”
prism thousands of times a second,
rendering the statistical data to
be accurate to ± 0.001”. It can
have many applications, including
placing a part or component in
its final location or supporting
• Portable coordinate measuring
machine arm – This single-point
portable measurement device can
measure applications on its own
with ± 0.0015” accuracy.
• Photogrammetry –
Photogrammetry uses high-resolution photography to measure
discrete features using adhesive
targets strategically placed on
points of interest to capture as-built
dimensions at ± 0.005” accuracy.
For context, most of today’s
maps are made using this type of
technology. In fact, industrial
photogrammetry was developed
from the aerial photogrammetry
technique. This development drove
the accuracy possibilities down
to a few thousandths of an inch,
making the application a versatile,
easy to use measurement tool.
• Laser scanning – This technology
is used to capture 3-D coordinate
values for everything in sight
between 18 inches and 500 feet.
Three levels of scanners – a large
volume scanner (± 0.125” accuracy,
used to measure a whole building),
a medium volume scanner (± 0.015”
accuracy at 20 to 30 feet from an
object) and small volume scanners
(± 0.001” accuracy at 1 to 2 feet
from an object) – can be used to
ensure the best data collection for
each project. This is a commonly
used metrology technology, as it
collects large amounts of incredibly
• 3-D CADD modeling – Data
collected through laser scanning
creates 3-D models, animation,
load-path type interferences and
plans, with ± 0.125” accuracy.