三维激光扫描技术在土地复垦中的应用研究外文翻译

三维激光扫描技术在土地复垦中的应用研究外文翻译内容摘要：

gnificance At present, our country economy from the rapid development into sustained and stable growth, our understanding of economic development has transformed the single pursuit of economic growth for the unification of the economic, environmental and social coordinated development. The state and society on the improvement of the ecological environmental quality is being more and more attention. Land development and consolidation has been increasingly important, 3 d laser scanning as another technology revolution in the field of surveying and mapping, 3 d modeling techniques play an important role in the field of land reclamation. Chapter 2, 3 d laser scanning technology and application 3 d laser scanning technology 3 d laser scanning technology is a new technology of surveying and mapping, surveying and mapping is once again after the GPS technology in the field of technological revolution. It is from the traditional measuring technology of surveying and mapping and integration through sophisticated sensor technology and a variety of modern hightech means integration, which is the generalization of the traditional surveying and mapping technology to the variety and integration. system position 3 d laser scanning system generally consists of scanner (puter) and the power supply system, controller of three parts. Laser scanner itself consists of laser ranging system and the laser scanning system, but also integrated CCD and instrument calibration and internal control system, etc. working principle 3 d laser scanning measurement of surveying and mapping technology content is high 14 precision measuring target39。 s overall threedimensional structure and the spatial threedimensional features, as well as all technical applications and services based on 3 d model。 Traditional threedimensional 3 d laser scanning measurement of surveying and mapping technology content is high precision measurement of target in the whole threedimensional structure and the spatial threedimensional features, as well as all technical applications and services based on 3 d model。 Traditional 3 d measurement technology content is high precision measurement of target one or more discrete anchor point of the three coordinate data and 3 d point at which a character. The former can rebuild the target model and analysis of structural characteristics, and to conduct a prehensive postprocessing of surveying and mapping surveying and mapping target plex geometry structure and content. Such as geometry size, volume, length, distance, area, center of gravity, structure deformation and displacement of structure and the change relationship, reproduction, analysis of various structural features, etc.。 While the latter can only measure the anchor point data and mapping between different anchor point of simple geometry, such as: length, distance, the deformation and displacement of point, etc. 3 d laser scanning measuring principle: every scan cloud point measurement is based on the principle of triangulation, and based on laser scanning sensing automatic stepping driving the direction of the 3 d measurement. Triangle measuring principle is implemented through laser beam from the laser beam through the viewfinder (triangle first corner) launched into target, forming the light Angle of the second point (triangle), and then by CCD (third Angle triangle point) accept target on the spot, in the end, based on the two points of view and a triangle bottom calculated the distance between target depth of field (Y), then after moving laser beam of light spot of displacement Angle difference of Z and Y coordinates are calculated, the X coordinate. See figure 4. Lies in the role of reflector laser beams horizontal deflection, surveying and mapping 15 function to realize the horizontal scanning laser scanner body itself since circumferential rotation function can realize the vertical scanning, whenever the horizontal scanning after one cycle, will step into a scanner themes, in order to scan on the second level, so synchronization, achieve all the space of the scanning process. After each scan a cloud point, the CCD will cloud point information is converted into digital signals and transmitted directly to the puter system to calculate. The threedimensional coordinate data by measuring point is obtained. Scanner used automatic, realtime and adaptive laser beam is focused on the technical () in the different sights, in order to make sure each scan point cloud of the ranging precision and position accuracy is high enough. It can work in a very wide area and under the illumination of various plex environment. According to the target size and accuracy requirement, leica can bring different viewpoints to collect point cloud information after splicing processing merged into the same coordinate system, the bined approach is done through multiple scaling the ball. Operator using a portable puter can be remotely operated at the scene. The micro video camera in the sensor can provide realtime access to views. Video camera can be realtime monitoring and remote viewing the scanning process, can also be used to capture the required target images, so that the postprocessing of calibration work. Complete reconstruction goal, only from a scanning spot surveying and mapping the target data is not enough, must also be in different scanning observation points of surveying 16 图 21 and mapping, and in the same space coordinate system and to generate, MENSI technology provides automatic merging of artificial auxiliary function, as long as the plan before scanning the target scan the content and goals can be set up calibration. As shown in figure 21. As shown in figure 22, the content of different observation point scanning point cloud to。