救援任务：使用现实捕获来计划前修道院的重建亚博ag真人规律

作者：AndréAzevedo

Next to the Carmo Church in Braga, Portugal, sits a former Carmelite Convent founded in 1653. No longer occupied and in need of significant repair, the convent compound was acquired by property developer and renovation experts, Fortera.

To decide on the best way to sympathetically develop the complex site, which includes vaults, attics, and water features, Fortera asked civil engineering company建立to carry out a complete geometric survey. To capture the data needed to build a BIM model, André Azevedo, technical manager at Buildgest used a Leica Geosystems 3D laser scanning solution.

可视化环境中的3D

The convent has a complicated interior and exterior made up of multiple buildings, levels and outdoor space. Before Buildgest was appointed, Fortera had already commissioned a 2D survey. Unfortunately, this didn’t capture sufficient detail for them to move into the design phase of the development confidently. Azevedo explains, “The classic 2D survey has some flaws, so we proposed a laser scanning survey and an accurate architectural model for the building. This Building Information Model (BIM) will help the client´s architect team to study different intervention scenarios.”

通过简化的现实捕获解决方案在现场更快的扫描速度亚博ag真人规律

潜在的建筑区域为5,000平方米，复杂的几何形状和六个星期的截止日期，建造质量需要快速进行现场工作。如果他们花了很长时间，他们的建模团队将没有足够的时间完成工作。

Already a Leica Geosystems users, Azevedo chose theLeica BLK360成像激光扫描仪，旋风注册360，，，，Cyclone FIELD 360，3dreshaper（Cyclone 3DR) andJetStream Viewersoftware elements.

“我们需要设备,可以生产室内scanning quickly and accurately. The scanner is small and light compared to other equipment and that facilitated transportation to difficult zones of the buildings like attics and caves. The workflow between the products and software is smooth and quick. For example, Cyclone FIELD 360 pre-registers the scans automatically. That gives us faster scanning in the field,” explains Azevedo.

7天内600次扫描

Azevedo和他的团队并行使用了两个BLK360扫描仪，持续了7天，以扫描修道院的建筑物。BLK360（同类产品中最小，最轻的成像激光扫描仪）用全彩色全景图像覆盖在高准确点云上。为了确保整个点云是准确的，建立了一个调查控制网络，该网络在建筑物和内部周围具有激光扫描目标。

A total of 600 detailed scans were taken. To improve efficiency, Azevedo used the Cyclone FIELD 360 mobile-device app to pre-register the point cloud while still on site. In his words, “Pre-registration of the collected information in the field saved time in post-processing tasks.”

易于同步，互操作性和处理

回到办公室，建筑最大的团队使用Cyclone注册360来清洁和注册扫描，从而创建统一的点云。Azevedo说：“旋风场和旋风分离器寄存器之间的同步很好，可以易于使用。”

Processing included giving some shapes more definition. “Ornamental details, like the central water fountain that lies on the internal patio was modelled with the help of 3DReshaper,” Azevedo explains. The data was then processed further by a team of two modellers over a period of five weeks to create a complete architectural BIM model for the client. Azevedo explains the value of accurate scan data to this process, “Modelling the existing vaults of the convent was challenging and the use of point cloud helped us to have a complete understanding of the geometry of these elements.”

“通过摄影记录来审查模型很有帮助”

When the geometric survey was complete, Buildgest presented their findings to Fortera. As well as delivering the BIM model, and an LGS file of the data, Buildgest used a Cyclone Publisher Pro and JetStream Viewer to show the client how to explore and move the point cloud. They see this as the best way to communicate the results.

“We always recommend the JetStream Viewer to our clients, because it's more specific and helpful to review the model with the photographic record. Using the viewer, the client was able to see the 360 images that were captured in the scanning process. Besides, it gives them the option to navigate through the point cloud with a simple intuitive tool,” Explains Azevedo. JetStream Viewer Portable is a free, no-install version designed for easy visualisation, to let those without survey training experience point cloud data.

建立was able to complete the project quickly without compromising on quality. Pedro Ferreira, chief engineer at Fortera, says, “Fortera was truly satisfied with the amount and quality of information that was delivered.” Now it’s over to the developer’s architects to plan a reinvention of the buildings, adding another chapter to the convent’s 350-year story.