Introduction
Building Information Modeling (BIM) revolutionizes construction by enabling efficient, accurate, and larger building projects with top-notch precision. Laser scanning techniques are vital for BIM success, playing a crucial role in accurate modelling. Their revision allows the capture of more detailed data from the physical environment. In this article, we will explore the different types of laser scanning techniques used in BIM.
What are Laser Scanning Techniques?
Laser scanning techniques introduced a contactless and non-aggressive method for capturing precise 3D data about physical objects and surroundings. This is where we use lasers to measure the distance between the surface and the object that we are scanning to produce 3D point clouds. These point clouds serve as a base for generating three-dimensional models of the object or environment.
Types of Laser Scanning Techniques
There are several types of laser scanning techniques used in BIM, including:
1. Terrestrial Laser Scanning (TLS)
TLS, a ground-based laser scanning technology, captures 3D data of large-scale objects like buildings, bridges, and landscapes. TLS employs a tripod-mounted laser scanner, which captures data from a defined reference point. The machine emits lasers that measure distance and construct a 3D cloud of points, which can be utilized to generate the ideal 3D model.
2. Mobile Laser Scanning (MLS)
MLS enables 3D capture of large-scale infrastructure assets like roadways, highways, and railways. MLS utilizes a laser scanner mounted on a vehicle to acquire data as the vehicle moves. The emitted laser beams measure the distance and build a 3D point cloud that can be further used for creating an accurate 3D model.
3. Airborne Laser Scanning (ALS)
ALS stands for a method that is used in the making of 3D datasets of large-scale items that are natural, such as forests, mountains, and urban areas. ALS’s system utilizes a laser scanner deployed in the air by a plane or drone to acquire data. The scanner provides a range of laser beams that compute points measuring the distances to the objects or environment to derive a 3D point cloud that can be processed to generate a 3D model.
4. Handheld Laser Scanning (HLS)
HLS captures 3D data for small-scale objects like industrial equipment, artefacts, and sculptures. The laser scanner in HLS gathers information by moving the scanner’s hand across an object or environment while it is held in one’s hand. This device sends out laser beams of varied wavelengths that study the distance to an object or a setting. Then, using these nanoprecise 3D points, a detailed 3D model can be created.
5. Structured Light Scanning (SLS)
SLS captures 3D data for small to medium-scale objects like industrial instruments, artefacts, and buildings. SLS uses a lens to shoot light onto the object or environment and a camera to record the distortion of the light caused by the object or environment. The distortion can be used to generate a 3D point cloud that can be further used to generate a detailed 3D model.
Benefits of Laser Scanning Techniques in BIM
Laser scanning techniques offer several benefits in BIM, including:
- Increased Accuracy: Laser scanning yields accurate, high-quality 3D models, reducing errors and boosting efficiency.
- Time-saving: Laser scanning tools enable the generation of huge quantities of data very quickly; therefore, they reduce the time devoted to data collection and processing.
- Cost-effective: Combining manual measurements and site visits with digital laser scanning reduces costs and increases efficiency.
- Improved Collaboration: The scanners using light beams can lay an equal database platform for all the participants, improving their joint interaction and comprehension.
Conclusion
Laser scanning methods are crucial for BIM, providing accurate physical world data essential for modelling. Understanding laser scanning methods’ capabilities enables contractors to choose the best one for their specific projects. As BIM evolves, laser scanning technologies maintain their significance for BIM project success.
For more information about engineering, architecture, and the building & construction sector, go through the posts related to the same topic on the Pinnacle IIT Blogs page.
Find out more accurately what we are going to take off in the course of applying leading new technologies and urban design at Pinnacle IIT.
Subscribe to our YouTube channel and blog websites to obtain all the up-to-date information relating to construction matters.