Laser modeling of Notre Dame can Notre Dame in Paris be restored
4hw.com.cn: Recently, we are most concerned about Notre Dame de Paris. The 800 year old historical and cultural treasure was burned by the fire. Recently, it is reported that the laser modeling of Notre Dame de Paris has been completed. Can Notre Dame de Paris be restored? Let's have a look.
On the evening of April 15, Paris time, the landmark of Paris, Notre Dame de Paris, was damaged in a fire. The 80 meter high wooden spire collapsed in the thick smoke, causing people all over the world to fall into grief. Fortunately, there are a few news that can make the public feel a little relieved. First of all, the fire was not caused by arson. Second, the fire has been basically extinguished, and most of the remaining buildings and cultural relics of the cathedral have been protected. Finally, in the long run, the losses already caused may not be too great. " Casimodo's bell tower 'is still there, which makes many people who care about Notre Dame in Paris a little relieved.
French President macron has promised to rebuild the cathedral.
One person's research can make it look less bad. Andrew & middot, art historian and historical modeler; Dr. Andrew Tallon conducted a comprehensive study of Notre Dame in 2015 and created the digital archives of the building. Although Notre Dame de Paris has a long history, there is little information about the architects and designers who built the building. Therefore, Talon hopes to decrypt this ancient building through laser scanning technology.
The laser modeling technology used by Talon refers to 'photographing' Notre Dame with a laser, installing the scanner on a tripod, and then measuring the distance between the scanner and each point hit by the laser. Because each point represents a different distance, by analyzing these millions of points, Talon can understand how the Notre Dame expands and contracts in the sun and how it changes over a longer period of time. Combined with the 'point data cloud' generated by the laser scanner and the pictures taken on site, Talon established a fine model for the design of the substructure and Notre Dame, so as to judge where the architect deviated from the original plan or stopped work due to the unstable ground conditions.
In an interview with national geographic, Talon described the technology in detail, 'I must establish a target network, which represents the location points in space. After defining the scanning density (scanning resolution), release the laser. After emitting a beam of light, it measures the time it takes for the beam to hit the target and return to the target. "
Notre Dame King Gallery
Talon's research found that the gallery of kings, which occupies an important position on the side of Notre Dame, has deviated from the vertical line by nearly a foot. Researchers had suspected that the construction of the king gallery had stopped for 10 years, and Talon's new research revealed the reason for this. The construction workers stopped construction when they realized that the building was gradually moving in the thin sand. When the ground was stable, the workers started again ten years later.
Flying arch of Notre Dame
Another important finding is that the data show that the columns in Notre Dame are not aligned completely. This may indicate that the workers may not demolish all the original buildings in the site of Notre Dame, but integrate them with the later buildings. Flying arches, which are usually considered to be added to the building in the later stage, may be repaired at the beginning to balance the effect of arch (this structure tends to tilt outward). The flying arch provides an external support that pushes the wall inward to balance the effect of the arch. Therefore, the walls of Notre Dame de Paris have hardly moved since its completion, which also proves the delicate balance achieved in the building.