Creating a digital twin from the skies keeps construction on track

作者：安妮·皮特卡宁（Anne Pitkaenen）

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

在德国科隆以北四十公里处，您发现了赫克斯瓦根市（Hückeswagen），在2019年开始建造一个新的商业园区 - 工业园区西三公里。在建筑公司的帮助下，Stricker。

在开始建造工作之前，必须清除大约25,000立方米的表土和回收。总体而言，必须平整230,000立方米的地面并准备排水和新的道路建设。在这个规模的项目中，与传统的测量方法相比，使用无人机（UAV）等航空调查设备（UAV）可能是调查团队的战略优势。安全性得到了改善，因为无人机测量师不需要进入主动建筑工地，从而避免了可能的危险。此外，建筑工地活动可以继续，而不会导致测量引起的中断。这可以使网站生产效率，同时拥有最新的AS构建数据。

Survey-grade data you can trust

斯特里克的调查团队负责不仅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.

At first, they used a prosumer-grade UAV, but found that it was not able to provide the accuracy required. Recognising the clear benefits of surveying with a UAV, the team set out to find a more reliable and accurate solution. Having used Leica Geosystems survey tools on site anyway, such as Leica iCON solution with Leica iCON gps 60 GNSS and Leica iCON robot 50 total station and Leica Rugby solutions, for many years, the Stricker team selected the Leica Aibot AX20 UAV platform.

They fly over the whole construction area each month, which enables them to compare the digital twin data from month to month to ensure the project is proceeding as planned. The point cloud data capture from the Aibot is used for terrain profiles and volume calculations.

“First we were convinced that having a UAV for surveying would be beneficial for us. After using another solution, we realised that we needed a surveying UAV to achieve the accuracy, efficiency and safety our projects need. We chose Aibot because of that, and we are pleased with the results we get and are using it now in many of our projects”迈克尔·施瓦茨科普夫说Diplom-Ingenieur和年代urveyor at Stricker.

来自上面的数据收集

为了保持视线并确保对如此大的建筑工地进行调查时，飞行员需要计划从多个地点进行测量任务。该团队使用为Leica Aibot的战斗计划软件，可以确认，由于AX20可以实现的覆盖范围，总共只需要四个航班来捕获整个站点。在第一次调查中，天气很差。下雨了，变得非常黑，但是Leica Aibot仍然能够返回高质量的数据，因此尽管天气恶劣，团队仍可以继续进行，并按计划完成了航班。

During the four flights, Aibot automatically collects 42-megapixel photos, as well as detailed flight and location information. To achieve the best quality, HxGN SmartNet is used for GNSS corrections, and the data is then processed in Leica Infinity software to produce a point cloud, orthophotos and a digital terrain model. The resulted accuracy of the entire point cloud between 2-5 centimetres complies with the requirement given by the contractor. By importing the data into AutoCAD Civil3D for further processing, the team can generate volume calculations, site plans and profiles.

Schwarzkopf评论，“我们只需要无穷大才能处理无人机收集的所有数据以进口到AutoCAD Civil3D；而且，由于驾驶Leica Aibot的轻松和可靠性，我们可以在现场花费的时间更少，我们可以整体上节省时间和成本。”

飞行员培训

Commercial UAV pilots in Germany need a mandatory UAV pilot license - much like a driver license - known as the “Kenntnisnachweis”. In addition to that, upon purchasing the Leica Aibot, the Stricker surveyors participated in a two-day training course at Leica Geosystems UAV academy training facilities in Cologne. The training covers not only how to fly the copter, it includes full workflow training - from set-up to planning to operating and finally, data processing. After completing the training, the pilots were able to fly their first projects; and subsequently plan to train a third UAV pilot.

“在开始自己的测量项目之前，我们俩都参加了Leica Aibot培训。培训后，我们知道如何安全有效地操作系统，并了解使用无人机进行测量的重要内容，”says Lukas Vielberg, Surveying Technician at Stricker.

Since the Hückeswagen project, Stricker is now successfully 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.

Read more about莉卡·艾博特（Leica Aibot），，，，Leica InfinityandHxGN SmartNet。