从天空中创建一个数字双胞胎可以保持构造

Author: Anne Pitkaenen

Construction company Stricker leverages aerial reality capture data from monthly flights, saving project time and keeping the survey team safe.

Fourty kilometres North of Cologne in Germany you find the city of Hückeswagen, where construction of a new business park - Industrial Park West III - began in 2019. Spanning an area of 145,000 square metres, what was once a fairly steep green meadow is being transformed with the help of construction company, Stricker.

Before building work could begin, approximately 25,000 cubic metres of topsoil had to be removed and recycled. Overall, 230,000 m³ of ground had to be levelled and prepared for drainage and new road construction. In projects of this scale, using aerial survey equipment such as an Unmanned Aerial Vehicle (UAV) can be a strategic advantage for the survey team, compared to traditional surveying methods. Safety is improved, as the UAV surveyor does not need to enter the active construction site, keeping away from possible danger. In addition, the construction site activities can continue without interruption caused by surveying. This keeps the site productive while having up-to-date as-built data.

Survey-grade data you can trust

Stricker’s survey team were tasked with not only monitoring the progress of the project on a monthly basis but also providing volume calculations and documentation to the wider project team. Knowing that stockpiles are not typically well measured by conventional survey instruments - they are hard to access or there are too many variations in the height - the team opted for surveying with a UAV.

起初，他们使用了无人机，但发现它无法提供所需的准确性。认识到使用无人机进行测量的明确好处，该团队着手找到一个更可靠，更准确的解决方案。无论如何，在现场使用了Leica GeoSystems调查工具，例如使用Leica Icon GPS 60 GNSS和Leica Icon Robot 50 Total Station和Leica Rugby Solutions的Leica Icon解决方案，多年来，Stricker Team选择了Leica AIBOT AX20无人机平台。

他们每个月飞越整个建筑区域，这使他们能够每个月都会比较数字双胞胎数据，以确保该项目按计划进行。从AIBOT捕获的点云数据用于地形曲线和音量计算。

“首先，我们坚信拥有无人机进行测量对我们有益。使用另一种解决方案后，我们意识到我们需要一个测量的无人机来实现我们项目所需的准确性，效率和安全性。因此，我们选择了Aibot，我们对我们获得的结果感到满意，并且现在在我们的许多项目中使用它”says Michael Schwarzkopf, Diplom-Ingenieur and a surveyor at Stricker.

Data collection from above

To keep line of sight and ensure data quality when surveying such a large construction site, the pilots needed to plan the surveying missions from several locations. Using the fight planning software for Leica Aibot, the team were able to confirm that just four flights were needed in total to capture the entire site due to the coverage achievable with the AX20. During the first survey, the weather was poor. It rained and became very dark, but the Leica Aibot was still able to return quality data so the team could continue despite the bad weather conditions and completed the flights as planned.

在四个航班中，Aibot自动收集42兆像素的照片，以及详细的航班和位置信息。为了达到最佳质量，HXGN SmartNet用于GNSS校正，然后在Leica Infinity软件中处理数据，以生成点云，正射击和数字地形模型。2-5厘米之间整个点云的准确性符合承包商给出的要求。通过将数据导入AutoCAD Civil3D进行进一步处理，团队可以生成数量计算，站点计划和配置文件。

Schwarzkopf comments,“We need only Infinity to process all the data collected by the UAV to import into AutoCAD Civil3D; and will less time spent on site thanks to the ease and reliability of flying the Leica Aibot, we can realise time and cost savings overall.”

Pilot training

德国的商业无人机飞行员需要强制性的无人机飞行员许可证 - 就像驾驶执照一样 - 被称为“ kenntnisnachweis”。除此之外，在购买Leica Aibot时，Stricker测量师还参加了科隆的Leica Geosystems UAV学院培训设施为期两天的培训课程。该培训不仅涵盖了如何飞行主机，还包括完整的工作流培训 - 从设置到计划再到操作，最后是数据处理。完成培训后，飞行员能够驾驶他们的第一个项目。随后计划培训第三个无人机飞行员。

“We both attended the Leica Aibot training before starting our own surveying projects. After the training, we knew how to operate the system safely and efficiently and understand what matters in using a UAV for surveying,”Stricker的测量技术员Lukas Vielberg说。

Huckeswagen项目以来,斯特里克现在是往下cessfully using the Leica Aibot on other construction sites and for other projects and combine the data with other surveying data. With fast data collection and an easy workflow using a UAV solution, the Stricker survey team can complete their work more efficiently and safely, ultimately saving time and money across their construction projects.

阅读更多有关Leica Aibot,Leica InfinityandHxGN SmartNet.