Photogrammetry plays a varied role in Predicts Infrastructure Problems like bridges, dams, and skyscrapers. Photogrammetry and UAV technologies, it is now possible to detect the issue before they arise and thus can save lives as well as money in the process.
3. www.nibt.education
Introduction
• Inspecting any infrastructure asset like bridges, dams as well as massive
skyscrapers is a vital task to their maintenance. Since these structures are
huge, large, complex and often out of the way, the conventional methods
like terrestrial LiDAR prove to be slow, expensive as well as challenging to
use.
• Let’s take an example of drinking water infrastructure inspection here
which ran into some problem. The company was in need of a better way to
inspect the infrastructure. Thus, they found what they were looking in for
UAVs and photogrammetry technology.
4. www.nibt.education
• With the use of photogrammetry technology, it was easy for the company
to survey the dam with higher accuracy as compared to terrestrial LiDAR.
• This not only gave higher coverage but also at much lower cost and with
much smaller time as well.
• With the use of UAV and Photogrammetry technology, the company was
able to do a lot more regarding maintenance. Now they can make use of
UAVs as well as photogrammetry to survey the dam regularly. They can
also use preventative measures and repair the dam before any issues, thus
saving money as well as lives involved in the overall process.
5. www.nibt.education
The Best Way To Maintain The Dam
• A drinking water infrastructure is one of the crucial entities to maintain it
with high safety standards. The company has also developed a model for
predicting the dam response to the climatic changes including
earthquakes as well as thermal variations.
• Well, to feed this model, the company also requires exact data that can be
gathered with short turnaround time. The UAV Photography can satisfy
their needs, but the accuracy and precision requirements are still under
the hood.
6. www.nibt.education
Any chance for Drone Photogrammetry?
• Well, to achieve the target, the company set up an experiment to try it
out. Firstly, they perform all the topographical surveys. With GPS,
terrestrial laser scanners and aerial photography, the companies survey
the main dam as well as supportive structures such as guard house and
the weighing blocks.
• Next step was to set up a UAV survey. Visualizing the atmospheric
conditions, they began the study using Total stations to place control
points around the dam and geolocate the results of the UAV
photogrammetry. By sending the UAV, they were able to gather numerous
photographs, around 6000.
7. www.nibt.education
• After processing the photographs with Bentley’s Photogrammetry
Software, the group generates both 3D model files and dense point clouds
of the dam.
• The company then compared the model files with the traditional survey
data that was previously gathered.
• Result? The UAV data enriched with data showing deviations within a
range of 2 centimeters which was incredible!
8. www.nibt.education
Solution Of Issues Before They Arise
• The dense point cloud generated by Photogrammetry software gave a
good reflection of the reality. It was able to capture the current state of
the dam within a short time. The point cloud data feed the model with
accurate data that predicts changes in dam’s mechanical properties.
• By using UAVs and Photogrammetry, it is now possible to perform
proactive asset management. The tools and methodologies can detect the
problems before they become real-world safety risks.
• In simple words, with the use of Photogrammetry and UAV technologies, it
is now possible to detect the issue before they arise and thus can save
lives as well as money in the process.
