What is LiDAR and How Does It Work?
LiDAR is a remote sensing technique that relies on laser light to gather measurements. This data is subsequently employed to develop 3D models and maps of objects and environments. LiDAR stands for Light Detection and Ranging, and it's commonly referred to as LiDAR technology.
A LiDAR system determines the duration required for light beams to hit an object or surface and then bounce back to the portable laser scanner. By utilizing the velocity of light, the distance can be computed. These measurements are referred to as 'Time of Flight' calculations.
Based on the type of sensor used, LiDAR 3D scanning units can emit hundreds of thousands of pulses per second. These light waves interact with objects and return to the LiDAR sensor. By analyzing the time taken for each pulse to return, the LiDAR sensor calculates the distance. Each of these pulsed laser measurements, or returns, is transformed into a 3D visualization called a 'point cloud'.
Applications of LiDAR Technology
LiDAR offers numerous benefits across various industries.
Mapping: For surveying tasks, LiDAR is invaluable for gathering three-dimensional data. They can generate digital terrain model (DTM) and digital elevation models (DEMs) of specific landscapes.
Architecture: LiDAR 3D scanning systems are widely used in surveying the built environment, including buildings, road networks, and railways.
Real Estate: An indoor portable laser scanner is employed to measure space and create precise floor plans. They help assess the structural integrity of buildings, plan spaces, and identify areas that require repair or renovation.
Construction: LiDAR technology tracks building projects and creates digital twins for Building Information Modeling (BIM) applications. It also aids in producing 3D models for the conditional monitoring of structures and Revit models for architects and structural engineers.
The Environment: LiDAR has numerous environmental applications, such as mapping flood risks, estimating carbon stocks in forests, and monitoring coastal erosion.
What is LiDAR Surveying?
LiDAR surveying is a rapid and efficient method for gathering 3D information. Employing laser pulses to compute distances, acquire precise measurements, and evaluate ranges has become increasingly preferred. This straightforward approach to data acquisition is renowned for its precision, speed, and adaptability.
Portable laser scanner employs trigonometric triangulation to skillfully capture a 3D form by taking millions of points. A LiDAR device operates by projecting a laser line or several lines onto an object. It then records the reflection using a single or multiple sensors, which are situated at a fixed distance from the laser's origin. Consequently, precise point measurements can be attained by computing the reflection angle of the laser beam.
Advantages of LiDAR Surveying
Speed: Thanks to LiDAR's ability to process hundreds of thousands of points per second, surveying has become a highly efficient method. Inside-building scans can be completed within a matter of minutes, and large-scale surveys can be finished in under an hour, all without needing GPS.
Accuracy: With LiDAR systems, data collection is incredibly dense, with minimal space between points, leading to exact results. This accuracy allows professionals to create detailed maps and models of both natural and artificial geographies.
Flexibility: LiDAR provides numerous options for surveying land. Hand-held devices are perfect for LiDAR 3D scanning and can be easily mounted on vehicles, poles, or drones. Additionally, LiDAR data can be collected at any time, whether during the day or night, as it relies on light as its measurement tool.
Safety: Due to their relatively fast operation and remote control capabilities, LiDAR systems are ideal for hazardous areas where human operation may not be feasible or safe for extended stays.
Which Fits Me Better?
|Product||Trion S1||Trion P1|
|Weight||1.8 kg||1.05 kg|
|Scanning Range||120m||40m@10% reflectivity|
|Scanning Point Frequency||320,000 points/second||200,000 points/second|
|Battery Life||4H (dual battery)||1.5H (grip battery, room temperature)|
|Camera Resolution||16.6 million||12 million|
|Camera Field of View (FOV)||360°||180°|