How to monitor the deformation of buildings by photogrammetry

"Zhu Xun China" network answers for you:

In recent years, the close-range photogrammetry method has been applied to measure the settlement of foundation and building, the inclination of building, the parameters of cracks, the parameters of model deformation state, and the deformation of construction machinery parts. Close-range photogrammetry usually uses phototheodolite, ordinary camera or high-speed camera to continuously record a large number of point deformation information of buildings and test models in a certain period of time or in an instant through vertical, equidistant and intersecting photography. And use three-dimensional coordinate measuring instrument, electronic computer, precision three-dimensional surveying and mapping instrument or analytical surveying and mapping instrument to measure the two-dimensional or three-dimensional relative deformation of observation points with time according to analytical method or analog analytical method. Photographs taken can also be checked and measured at any time as files.