【正文】 n2 pulsed laser scanner to Scan rate, 50000 HP/SEC HDS6000 phase laser scanners Scan rate 500000 damage per second, application of laser scanning measurement technology for space target entity 3 d information acquisition speed is very fast, can realtime determination of solid surface 3 d information, which can be applied to deformation monitoring and other fields. (2) realtime, dynamic, initiative. The ground threedimensional laser scanning system through active laser signal, the reflection prism launch and receive back the laser signal to obtain the target information, not be restricted by external conditions, such as lighting, air pressure, realtime observation can throughout the day. (3) the noncontact. 3 d laser scanning system is through the transmitted pulse signal and receiving the reflected pulse signal measured object surface shape information of target acquisition and measurement. Thus the process without the need of human contact to be 19 measuring objects, which makes the technology can be widely used in the dangerous areas and surveying and mapping personnel do not reach the position measurement, etc. (4) perating. Have certain perability, laser can perate not too dense vegetation and so on to reach the surface of the target entity, instant access to the surface of the target entity point cloud information in great quantities, the point cloud information can describe different levels on the surface of the object geometry information. (5) has the characteristics of high precision and density. Laser scanning measurement technology can quickly obtain the target space information of large area, through to the target scan directly to describe the target characteristic, using the large lattice and the dense grid to get the target information, the spacing between the sampling point is. (6) laser scanning measurement technology has the operation cycle is fast, easy to update, and timeliness is strong wait for a characteristic, at the same time, direct access to digital signal, digital features. application field Due to the 3 d laser scanner technology is particularly suitable for the surface of plex objects in the measurement of large area, so its application range is very wide. Relics repair: repair of damaged cultural relics, noncontact measurement, the traditional measurement is not up to, but it can make full use of laser scanner noncontact measurement features, as well as high resolution and high accuracy of point cloud data, obtaining fine structure on the surface of the building, provide the repair data, precision measurement and repair of cultural relics. Slope deformation monitoring, 3 d laser scanning technology can obtain high density, high precision of 3 d point cloud data, therefore, on the slope deformation monitoring can 20 reflect the overall slope deformation trend and scale of the operation process is scanned regularly on the slope, the superposition of two scanning point cloud data together, and then by the processing software analysis before and after the difference of two point cloud data, thus the deformation trend of slope and the order of magnitude. Mining subsidence monitoring, because of 3 d laser scanning technology has the characteristics of fast and high resolution and high precision for mining subsidence monitoring in is, can be on the surface of the mobile can quickly obtain the space location of the target area and the vertical change of the relative position to determine the surface movement of subsidence area. Urban cadastral survey: in the town cadastral survey of the past, the results of the survey for datum and report form, the more poor availability and 3 d laser scanner can produce a threedimensional image of the image, to obtain threedimensional point cloud data modeling, convenient to measure on the puter, have greater precision increase, of course, this is just a portion of their application due to its good technical superiority, industrial medical measurement in reverse engineering of digital city, etc. Different applications can be very good. Because the 3 d laser scanning technology has good technical superiority, has bee a new hotspot in the field of surveying and mapping at present, although the applications of 3 d laser scanning system research is still in its infancy, but has got good application in engineering construction with the deepening of the research and bined with other measurement technology, 3 d laser scanning technology will be more widely applied. Chapter 3 3 d laser scanning application in land reclamation the subsidence monitoring Because of 3 d laser scanning technology is quick, the resolution, high precision 21 characteristics of mining subsidence monitoring is going on, can be on the surface of the mobile can quickly obtain the space location of the target area and the change of the vertical position, to determine the surface movement of subsidence area. the feasibility 3 d laser scanner to get point cloud data after data pretreatment, model, finally get high precision DEM model, a process application software of 3 d laser scanner kit can be pleted. Will substracting the DEM model of the last observations for the first time, that is get the whole of subsidence area corresponding to the arbitrary coordinate value, then the area is divided into a certain size of grid, the output geodetic coordinate grid nodes and sink value, notes for the x, y, h, is get the whole data of subsidence area. Because of 3 d laser scanning has no fixed point, so can39。Yount K R Contaminated LandReclamation,Redevelopment and Reuse in the United States and the European Union [J].IEEE Visualization 1995,9(12):12211227. 12 原文 對照： 3 d laser scanning technology application research in land reclamation