Application of Digital Close-range Photogrammetry Based on Hydrodynamic Model in Deformation Measurement of Model Test

In structural deformation measurement, the traditional method of structural deformation measurement is complex and cannot meet the measurement accuracy requirements. Digital photography based on hydrodynamic model makes the application of digital photography technology in variable measurement of structural test possible because of the great improvement of image quality. With the development of hydrodynamics related research and image processing technology, close-range photogrammetry has become a trend, which has revolutionized the operation mode of measurement. Generally, it is only placed at the key points and positions of the test piece, and digital photography can record the test process and test scene. The requirements for the layout of the control points are high, and the accuracy is high, which can effectively reduce the labor intensity. The node can obtain the direction of load flow at that point based on its location information. In the relevant monitoring process, professional measuring instruments can be used based on the fluid dynamics model. Ensure the function of the measuring instrument and check the calibration of the measuring device in advance.