Drone technologies have transformed industrial inspections, providing a safer and more efficient alternative to traditional methods. These technologies leverage advanced hardware and software to collect high-resolution visual, thermal, and sensor data from difficult-to-reach or dangerous areas.
Instead of climbing 50ft or more into the air on scaffolding, drones can easily access high structures or confined spaces and perform inspections quickly without scaffolding or rope access requirements.
However, while useful for visual assessments, traditional photo and video drone inspections have inherent limitations, particularly when it comes to measurement accuracy and environmental constraints. This is where LiDAR drone inspections excel.
LiDAR technology sets new standards for precision and reliability. It uses laser beams to scan an area and capture highly accurate distance measurements, which are then used to create detailed 3D models of physical spaces.
What Is LiDAR Technology?
LiDAR (light detection and ranging) is a remote sensing method that uses laser lights to collect precise 3D data on terrains and structures. The LiDAR system emits millions of laser pulses per second that bounce off surfaces. The drone, equipped with high-resolution cameras and sophisticated sensors, records the time it takes for the pulse to return. This data is then used to create highly accurate 3D models, maps, or digital elevation models (DEMs).
LiDAR drone inspections provide real-time data to assess construction sites, track progress, and improve planning. Unlike traditional photos and video drone inspections, LiDAR captures the entire site with precise measurements, providing more detailed post-construction analysis or as-built documentation.
Limitations of Photo and Video Inspections
Whether projects are large or small, accurate as-builts are essential for demonstrating compliance with building codes and contractual obligations. These drawings must reflect all changes made to the original design plans during construction, including any modifications, additions, or deletions.
Photo and video drone inspections rely on high-resolution cameras to capture these data points and provide a comprehensive view of the structure’s current state. However, while traditional drone inspections offer many advantages in terms of ease and speed, there are several limitations associated with relying on these methods for as-built documentation:
- 2D Data Capture
Traditional photo and video inspections capture only two-dimensional representations of structures. This limits the ability to accurately measure depth, size, and spatial relationships. Although techniques such as photogrammetry or 360-degree cameras can mitigate this to some extent, these technologies are still not as accurate as advanced 3D scanning methods, which can capture all the intricacies of a building’s geometry.
- Environmental Constraints
Photo and video inspections rely heavily on optimal lighting. Shadows, glare, and poor weather conditions like fog or rain can significantly reduce the quality and usability of the captured data. Additionally, dust, shadows, or reflections can distort the appearance of certain construction elements, leading to potential misinterpretations of the actual state of the site.
- Limited Penetration
Cameras cannot see through obstructions like fog or other barriers. This limitation makes it difficult to capture hidden or obscured structural elements critical in as-built data collection. For instance, a single photo may show an isolated view of a building component but cannot convey the overall spatial relationship within the larger project. Likewise, while more dynamic, videos may not offer a comprehensive view of the entire site or capture crucial angles needed for accurate documentation.
Why LiDAR Is Better for As-Built Data Collection
LiDAR video inspections overcome the limitations of traditional photo and video inspections. This advanced technology stands out for its exceptional precision and accuracy in distance measurements.
Since integrating LiDAR technology, over 80% of infrastructure inspection companies have reported substantial training and operational cost reductions. This increased efficiency has not only improved processes but also made infrastructure inspection more accessible to a wider range of stakeholders.
Discover the key advantages of LiDAR vs video and photo inspections:
- 3D Precision and Accuracy
LiDAR technology captures highly detailed, three-dimensional point clouds that provide precise measurements. This data is invaluable for tasks like volumetric analysis and structural assessments.
- Penetration Capabilities
One of the advantages of LiDAR vs video and photo inspections is that it can penetrate obstacles such as vegetation and fog. Traditional photo and video inspections are highly affected by environmental factors such as weather, dust, and glare. LiDAR, on the other hand, can operate effectively in a wider range of conditions, such as low-light environments, at night, and during adverse weather, making it a more versatile and dependable choice for outdoor inspections or environments where visibility is limited. - Speed and Efficiency
LiDAR enables faster data acquisition compared to traditional photo and video drone inspection methods. By capturing millions of data points in a short time, it reduces inspection durations and accelerates project timelines.
Real-World Applications of LiDAR in Drone Inspections
LiDAR technology is transforming how industries approach drone inspections. Here are a few examples:
- Site Surveys and Topographic Mapping: LiDAR technology is extensively used to survey construction sites. It produces detailed topographic maps by capturing precise elevation data, even in challenging terrains such as heavily forested or uneven areas.
- Progress Monitoring and Volume Calculations: LiDAR technology allows drones to create 3D models of ongoing projects, providing stakeholders with real-time updates. Additionally, it helps calculate the volume of materials such as excavation pits, stockpiles, or landfills with high precision.
- Structural Inspections: LiDAR-equipped drones are highly effective for inspecting structures like bridges and towers. The technology can identify structural anomalies, such as deformations or cracks, which may not be visible to the naked eye. This capability enhances safety by detecting potential issues early in the construction or maintenance phases.
- BIM Integration: Building Information Modeling (BIM) relies on accurate data to create virtual representations of structures. LiDAR data seamlessly integrates with BIM platforms, allowing teams to compare “as-designed” and “as-built” models. This integration ensures alignment between the design and the actual construction.
LiDAR Drone Inspections: A Quantum Leap in Precision
LiDAR technology is revolutionizing drone inspections, offering unmatched precision, efficiency, and versatility compared to traditional photo and video inspection methods. Investing in LiDAR is a strategic move toward more accurate as-built data collection and better project outcomes. Discover the advantages of LiDAR vs video and photo inspections.
At ATT Metrology, we specialize in precision metrology and advanced drone laser scanning services. Our LiDAR-equipped drones provide high-resolution point clouds for detailed analysis and modeling.
Contact ATT Metrology today to learn how we can help you quickly tackle any job with the latest scanning and workflow technology.