在旅途中扫描激光

随着世界人口的增长和全球变化n building and infrastructure construction become more rapid, our need to document this growth and change increases. Referred to as wearable reality capture sensor systems, this new concept is shaping how measurement professionals come to understand and shape the world among them. The Leica Pegasus:Backpack was invented as part of this generation of new wearable reality capture sensor systems in response to the growing global changes. The Prisma Group was the first company to utilise the Pegasus:Backpack in its recent infrastructure project.

Prisma集团总部位于荷兰，由三家公司组成：Prisma Meten，Prisma Geocensus和Prisma Van Steenis。该公司拥有多种专业，包括调查（铁路，基础设施，公用事业），工业（海上和陆上），GIS，水文学，测量测量，3D激光扫描，监视和移动映射。

Prisma Group一直是Leica Geosystems的品牌拥护者，依靠产生优质服务的优质产品。bob综合app下载Prisma集团的目标之一是发展国际市场。随着3D激光扫描领域的快速发展，Prisma集团渴望与Leica Geosystems紧密合作，以实现其目标，并成为扫描领域的第一名。

专注于扫描导轨
Through a collaborative partnership, Prisma Van Steenis was the first 3D specialist in the Netherlands that produced a 3D scan with the Pegasus:Backpack at the rail tracks of Pernis Rotterdam, Netherlands. Leica Geosystems was approached by Prisma Van Steenis in November 2015 to help with this challenging project. The project came about as it was commissioned by the government for a rail contractor to firstly verify the principles of procurement and then to assess what materials, such as ballasts, sleepers and rails, were present. Prisma Van Steenis were commissioned to carry out the rail project.

该项目范围需要扫描铁路轨道的位置和高度，因为承包商希望续签合同，并渴望强加铁路轨道的新对齐。在进行任何测量之前，对项目界面和重叠进行了初步分析，以及扫描数据和360度射击的风险。扫描的区域是一个院子，上面有许多轨道和开关，其中包含1.5公里的工业货物，几家运营商和公司已充分使用。完整的3D扫描将用于反向工程，以帮助外行计划，镇流器量和轮廓。捕获的3D数据可用于构建新的铁路轨道布局的可靠设计，该布局作为3D模型交付，也可用于BIM和数量确定。

在困难空间中的流动性
There were many challenges working in a railway environment whilst trying to capture reality data during this project. From low-hanging electrical lines to constricted spaces around train cars, classical surveying methods can be extremely limited in this environment. Whilst working on the rail project, Prisma Van Steenis had to take the measurements whilst the yard was in use, and, therefore, there were real risks of collisions and a high risk to personal health and safety. By law, the risk area (the railway track) is not an accessible area for surveyors and is normally prohibited for inspections. Prisma Van Steenis needed a safe, quick and accurate solution to collect the point clouds and 360-degree pictures needed for this scanning project. The survey needed to be collected quickly to reduce cost and lead time.

Pegasus：背包的部署比Prisma群体提供了许多优势。测量师在赛道上要安全得多，并且对健康的风险降低了得多，因为他们不必进入风险区域。除此之外，测量师不必在夜幕降临期间执行任何测量，这本身就是一种危害，可见性会引起许多危害。Pegasus：背包是完美的解决方案。可以在不进入具有最大效果的危险区域的情况下测量距离。通过Pegasus：背包的一个测量，在同一天为验船师提供了正确，当前和完整的信息。Pegasus：背包的测量质量在课堂上非常准确，最好。

该项目的结果与传统的地面测量进行了比较，该测量需要几天才能完成，而Pegasus：背包的结果令人印象深刻。背包扫描与数字测量之间的差异约为3厘米，相对结果甚至更好（MM级别）。捕获的3D数据可用于构建新的铁轨轨道布局的可靠设计。较新的技术还允许测量专业人员在三个小时内进行整个调查，通常需要五天。承包商也节省了近50％的成本。扫描的优点是您捕获了整个情况，因此，如有必要，可以在以后的点云中获得任何遗忘的细节。

“Using wearable reality capture enabled us to realise many benefits over traditional surveying techniques,” said Prisma Director Klaas de Weerd. “With Leica Pegasus:Backpack, every spot in the rail yard was reachable. We also did not have to implement extra safety measures since there was no need for us to enter high-risks areas: we could simply capture the data from a safe distance. Finally, we saw great time savings due to error-free data acquisition in a baseline survey that will allow us to accurately monitor any changes to the design in the future.”

Written by Natalie Binder