Study Of The Slope Deformation Monitoringby Using Close-range Photogrammetry

In recent years, as C hina’s infrastructure construction, regional form a large number of slope, over time, some high slope instability sliding easily, causing landslides. A massive landslide tend to cause damage to the village, river and infrastructure, seriously endanger the life property safety of the residents nearby. So the adoption of a certain technical method of slope deformation monitoring is of great importance. Using the related deformation monitoring data can make a correct evaluation of the slope stability of, and forecast the future of the slope displacement and deformation trend; to provide the scientific basis of safety early warning for related department. Digital close-range photogrammetry as a new fie ld of study of mapping technology, using a non- contact measuring mean, compared with the traditional measurement, with real- time, fast, large amounts of data and other advantages.In this paper, according to the actual requirements of slope deformation monitoring, using the digital close shot photogrammetry method, based on zuxun zhang academician developed multiple baseline digital close range photogrammetric system Lensphoto slope rock mass, the three-dimensional modeling study, by discussing the measurement of camera calibration, the precision of control points, key problems such as data processing, analys is and study based on the digital close shot photogrammetry technology of effective method of slope deformation monitoring. In this paper, the main research content, Including:(1) Analys is of slope deformation monitoring technology and the research status of the digita l close shot photogrammetry, the research based on digital close range photogrammetry method of slope deformation monitoring scheme.(2) Exploring the theoretical approaches of the mechanism, trying to get the camera calibration parameters based on the principle of two-dimensional direct linear transformation.(3) Application of multi-baseline digital close-range photogrammetry system Lensphoto generate three-dimensional model of slope, measuring the three-dimensional coordinates of monitoring sites, to exp lore the measures of slope deformation monitoring, to analysis the differences of accuracy between traditional total station measuring coordinate data of monitoring point.Above all, the paper made the following research:(1) In this paper, using the two-dimensional direct linear transformation principle, combined with MATLAB language programming method for camera calibration parameters. The method can achieve basic with Lensphoto digital close range photogrammetric system for camera calibration parameters at the same level of accuracy. Focus on the three dimensional model of formation of the two methods of monitoring, comparing the coordinate accuracy of the difference is very small.(2) Magnit ude compared with 0.5 seconds robot TM30 measurement to get thr ee-dimensional coordinates of the monitoring sites and Lensphoto digital close range photogrammetry system modeling measurement monitoring the accuracy of 3 d coordinate, the results show that the Lensphoto digital close range photogrammetry system modeling method is high precis ion, has certain reliability in the slope deformation monitoring.This paper belongs to a combination of theoretical research and practical application oriented articles, which is a bold attempt benefic ial for digital closerange photogrammetry application development in slope deformation monitoring.