The truth is that scanning is the only cost-effective way to collect an existing world.
You can’t use a ruler to go to a cathedral, oil refinery, or multifunctional metropolitan entertainment facility, and you can’t expect the precision needed to design the reliability of a refurbishment.
Laser scanning is the only way to do that.
Until recently, BIM users had taken a series of “embedded drawings” and placed them in a 3D modeling program to create a computer model for use. Well, a few years later, I realized that there were many contradictions between the “registration diagram” and the environment in which it was actually built. You can customize plaster and wood. However, for glass, steel, concrete, or mechanical equipment, seemingly small defects can be very costly, as they are much more difficult to deform and bend. (Placing expensive new equipment in an area that is too small is a nightmare for installers, designers, engineers, and insurance companies.)
These new 3D laser scanning technologies have dramatically changed and rapidly changed the surveying industry. But let’s take a step back to really understand evolution …
2004: 360 degree scan
The first 360 degree scanners appeared around 2004. Before scanning anything overhead, you need to tilt the scanner backwards to scan at a steep angle. In most cases, the vertical axis scan is only 120 degrees. Around this time, several companies announced full scanners. This makes it much easier.
2006: Flight time scan
The next evolution was the time-of-flight scanner. In 2006, the Time Flight Scanner took 45 minutes to an hour to do a full 360 degree scan. If I could run 8-10 scans a day, it worked. Today, depending on the density you want to make, the same can be done in about 12-15 minutes.
In our company, the first scan project was the road. For very complex areas, scan 1 “X1”. The time scanner was able to earn 4,000 points per second at that time. Now you can easily earn 50,000 points per second!
2008: Gradual scan
Today’s phase-based scanners can collect 2,000,000 dots per second and create im-inch x-im-inch patterns at a distance of about 100 feet. It’s amazing, it’s as fast and dense as the average user needs. The hardware will eventually be better, faster, and cheaper, but phase-based scanning is efficient, stable, and provides the ability to scan almost everything in a reasonable amount of time. Visit:- https://flight-scanner.de/
Currently: Scan to BIM
Today, large amounts of research funding are being spent on Scan to BIM technology. This technology transforms billions of points in the point cloud into useful data.
Several companies have been working on this, including small independent companies like Pointools who have found a way for scanners to recognize flat surfaces. (It may sound small, but it’s a breakthrough.) The program also recognizes pipes and automatically models them in about 50% of the time. (Another important advance).
Today, many pipe programs arrive at the same location and move the ball forward. We are currently working on what we call the “Ford Model T” software program, which is being improved every year.
After scanning very complex areas of industrial land, I had the opportunity to compare them with the drawings created. In landscape views, they are generally geometrically close to the real thing. However, on their vertical axis, the pipes and ducts in the structural drawing are rarely correct. There are many reasons for this, but in most cases the process is so difficult that if the installer finds a simpler path, it will usually be.
“Log drawings” or records are rarely created after the task is completed. The conversation usually looks like this: “The blueprint is as follows. Mark the changes you have made.”
There is not much incentive to do a whole new study. However, when the design team takes these documents and models them in a computer program, they unknowingly cause many problems for the contractor of the new job. Recently, I took a set of documents created for a complex project, modeled it, and compared it to a point cloud to perform conflict detection and determine potential interference. The result was clear.
Some pipes, ducts, water pipes or firebreaks on the roof were in the locations shown in the wooden drawings. If these documents were used, the MEP contractor would have spent 10 times more to “install” the new tool inside the old tool.
Given the usefulness and cost of laser scanning, it is wise to use one for every refurbishment project. If there is nothing else, definitely! A single field adjustment can be much more costly than the scan itself.
By scanning the environment and placing the proposed design in a point cloud, you can know where the most important interventions take place within minutes. We found a conflict that would cost more than $ 100,000 to resolve if the field needed to be changed during construction. Some were fatal flaws in the required design approvals that could not be achieved and had to submit a completely new design.
Scanning to BIM is a very important big step in your investigation. At this point, it is the design software that is trying to keep up with the scanning possibilities. Already this year, we have introduced some new programs that are much better at accepting point clouds and computer models, but there is still a long way to go.