Application areas of 3D laser scanners

Three-dimensional laser scanners have been successfully used in cultural relic protection, urban building surveying, topographic mapping, mining industry, deformation monitoring, factories, large structures, pipeline design, aircraft and ship manufacturing, road and railway construction, tunnel engineering, It is used in bridge reconstruction and other fields.

The scanning results of the three-dimensional laser scanner are directly displayed as point clouds (pointcloud means the result of countless points presenting objects in the computer according to the rules of measurement). The spatial point cloud obtained by using three-dimensional laser scanning technology Using data, it can quickly build three-dimensional visual models of scenes with complex structures and irregularities, saving time and effort. This ability is unmatched by current three-dimensional modeling software.

Extended information

Classification of three-dimensional laser scanners:?

Three-dimensional laser scanners can be divided into: airborne (or satellite-based) according to different scanning platforms ) Laser scanning system, terrestrial laser scanning system, portable laser scanning system. ?

As the most time-sensitive 3D data acquisition tool today, 3D laser scanners can be divided into different types. Usually, three-dimensional laser scanners are classified according to their effective scanning distance, which can be divided into:?

(1) Short-distance laser scanner: its longest scanning distance does not exceed 3m, and generally the best scanning distance is It is 0.6~1.2m. Generally, this type of scanner is suitable for measuring small molds. It not only has fast scanning speed but also has high accuracy. It can have up to 300,000 points with an accuracy of ± 0.018mm.

For example, the VIVID 910 high-precision 3D laser scanner produced by Minolta, the handheld 3D data scanner FastScan, etc., all belong to this type of scanner. ?

(2) Mid-range laser scanner: 3D laser scanners with a longest scanning distance of less than 120 m are mid-range 3D laser scanners, which are mostly used for the measurement of large molds or indoor spaces. For example: ScanStation P30/P40 3D laser scanner produced by Swiss company Leica belongs to this type of scanner. ?

(3) Long-distance laser scanner: 3D laser scanners with a scanning distance greater than 270m are long-distance 3D laser scanners, which are mainly used in buildings, mines, dams, large-scale civil engineering, etc. measurement. For example: ScanStation P30/P40 3D laser scanner produced by Swiss company Leica belongs to this type of scanner.

(4) Ultra-long range laser scanner: The longest scanning distance is usually greater than ?1 km, and it needs to be equipped with an accurate navigation and positioning system, which can be used for scanning and measurement of large-scale terrain. ?For example: the ScanStation P50 3D laser scanner produced by the Swiss company Leica belongs to this type of scanner.

The reason for this classification is that the effective distance of laser measurement is an important condition for the application range of 3D laser scanners, especially for the observation of large-scale features or scenes, or inaccessible features, etc. etc., these must be taken into account the actual measurement distance of the scanner. ?

In addition, the farther away the measured object is, the less accurate the ground object observation will be. Therefore, to ensure the accuracy of scanned data, it must be used within the standards specified by the corresponding type of scanner.

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Baidu Encyclopedia-3D Laser Scanner