Laser scanning from heights

Author:Renata Barradas

近年来，Laser Scanning彻底改变了调查专业。有可能在相对较短的时间内捕获大量数据，3D laser scannersare must-have instruments for collecting data to produce outputs that range from a simple topographic survey to a 3D model to preserve cultural heritage.

随着流程数字化和企业数字化数字化，世界各地的测量师公司都像Scan&Go, are adapting new technologies to offer better, faster and more specialised services to their clients. In collaboration with Leica Geosystems, Scan&Go, an Italian company leader in the field of topography and 3D high-definition survey, performed a functional test of its vehicle/tripod installation for 3D laser scanning using theLeica RTC360 3D laser scanner.

Tailored solution for 3D laser scanning

To achieve a更快，更有效地使用陆地激光扫描仪, Scan&Go creates systems that can be installed on any type of vehicle or on a pneumatic pole to allow easy movement between scan sessions and ensure greater measurement range.

Mounted on the Scan&Go System, the RTC360 captured at2 million points per secondthe centre of Castelvetro di Modena, Italy, in only a few minutes. The Scan&Go team mounted the RTC360 on Scan&Go’s level lift roof and automatic LP16R leveller. For the first scan, the team captured the centre of Castelvetro di Modena from a3-metre height. The remaining three scans were done at a6-metre altitude from the groundusing Scan&Go vehicle installation.

“The height of the scanner allows to overcome the obstacles present and increases the scanning range and its accuracy of measurement,”explained Cristina Valchuk, sales manager at Scan&Go.“All scans are perfectly levelled –this eliminates vertical variations. Our satisfaction of the test made is very high. This approach ensures the safety of the operator and the instrumentation in the field and increases the productivity of the RTC360.”

测试的目的是verify the potential of the new RTC360 in combination with the Scan&Go system for laser scanning in mobile “stop” and “go” modewith the instrumentation installed on the vehicle. The Scan&Go team also wanted to test thecorrect functioning of the Visual Inertial System (VIS), performing the automatic point-cloud registration in the field, with speeds higher than those achieved by foot. The point cloud collected at avehicle speed ranging from 10 to 20 kilometresand registered in real-time surprised the team.

“The results obtained with the RTC360 are very good. During the scans, the system is very stable ensuring maximum measurement accuracy,”said Valchuk.“It is very fast because the 3D laser scanner is mounted on the vehicle and you do not have to disassemble anything during the movements between one scan and the other.”

从原始数据到智能数据

Point clouds are only a set of data points in space until stakeholders can visualise and interact with them. 3D models obtained from the point clouds help to inform the perception of reality and provide a georeferenced digital base for operations. Scan&Go creates 3D models for their clients so they can document, manage, renew or maintain any assets or environments. After post-processing data withCyclone REGISTER 360, experts created a 3D model of Castelvetro di Modena.

考虑到简单且高度自动化的工作流程，RTC360 solution uses edge computing to stream scan data to a tablet in real time并自动处理扫描数据以提供real-time quality controland data registration in the field.

Withautomatic pre-registration, high-quality point clouds were immediately available for the Scan&Go team. Quality assurance and completeness checks were also done in the field with the Cyclone FIELD 360 mobile application running on a tablet.This reduced the complexity of the data capture process in the field and saved the team members time in the field and in the office由于他们能够离开项目站点的预注册，可以在旋风注册中最终确定360速度，比原始扫描数据更快。Scan＆Go知道，节省时间，工作流程简化和生产力的提高会自动转化为增加的利润和加速投资回报。

Reality capture systems from Geosystemsincrease the flexibility and mobility of professionals to map, geo-position, capture and extract featuresover LiDAR or photogrammetry measurements in restricted areas withmillimetric precisionin an extremely agile and fast way.