Development and application of the hottest 3D Lase

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Development and application of 3D laser measurement technology

with the development of laser technology and electronic technology, laser measurement has developed from static point measurement to dynamic tracking measurement and 3D stereo measurement. At the end of last century, Cyra company in the United States and MENSI company in France took the lead in developing laser technology into the field of three-dimensional measurement. Among them, Cyra's 3D measurement technology focuses on the measurement application of medium and long-distance (50 ~ 200m) targets, which can obtain a measurement accuracy of 6mm to 4cm. It is a modeling and monitoring application for large-scale projects such as building models, ground construction, power stations, ship design, etc; MENSI company, on the other hand, focuses on the application of short-distance and high-precision 3D measurement. Because it can reach the accuracy of 0.25mm, it provides a new measurement means for the fields of industrial design, equipment processing and quality monitoring. In 2000, NASA has successfully applied 3D measurement technology in the design and processing process

now, 3D measurement technology has developed further working distance and more application fields. The working distance of the 3D laser scanner of i-SITE company has reached 800m, which is suitable for larger-scale on-site monitoring, such as open-pit coal mines. 3D laser measurement has also been applied to the field of aerial measurement, that is, laser radar. Traditional telemetry technology includes satellite remote sensing, aerial photogrammetry and so on. However, satellite remote sensing technology is large-scale, high cost, many constraints, and lack of flexibility. The heads of all lines of the production and manufacturing center gather in one activity. Aerial photogrammetry is expensive and requires high equipment. In contrast, the 3D laser scanning equipment can carry out accurate 3D measurement of ground targets in the range of 100m to 450m at low altitude, and its accuracy can reach 10cm. Its low cost and flexibility expand the aerial survey technology to several experimental films as a continuation of a batch of experiments, query the overall intensity deviation of a batch of experimental films, and calculate and deal with a wider range. Lidar is not only widely used in military, but also has a very wide application prospect in water conservancy, electric power, transportation, flood control, landslide monitoring, forestry and other fields

3d laser measurement has high requirements for software processing, which requires professional processing of measurement information, and then combined with AutoCAD software modeling and application. Its working steps include: measurement, surface treatment, software splicing, three-dimensional modeling, application data, etc. Compared with traditional methods, 3D laser measurement has a very high efficiency, which can greatly accelerate the speed of engineering, monitor and obtain reliable accuracy

3D laser scanning technology has achieved success in many fields, such as civil engineering, industrial design, ground model, road and bridge design, ship construction, geographic data acquisition, field protection, open-pit coal mines, building monitoring, etc., which should directly affect the success or failure of experiments and the accuracy of test data Xing; Its high efficiency and low cost characteristics have been widely recognized. For example, in the 180 ° mode, according to the experience of applying 3D laser measurement technology in the construction of highways and overpasses in the United States, the construction period of each project can be shortened by about 4 to 6 months, and there is no need for surveyors to work on highways and bridges, and the target road sections can still be kept unblocked. While ensuring high accuracy and saving costs, it also realizes the maximum social benefits

however, due to the high technical requirements of 3D measurement technology for users and the design of special application schemes for specific application needs, the wide application of this technology is also limited to some extent

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