Vibration test three-dimensional deformation measuring device based on laser speckle interference
A technology of vibration test and three-dimensional deformation, which is used in measurement devices, vibration tests, and optical devices to avoid measurement errors.
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[0033] The measurement device consists of laser 2, high-speed camera 1, optical system, computer and measurement software: laser 2 uses a 532nm single longitudinal film Nd:YAG laser; high-speed camera 1 is used to collect speckle images; computer is used to store speckle images ; The measurement software uses the speckle interference fringe image collected by the high-speed camera to calculate the three-dimensional deformation; the optical system such as figure 1 , 2 As shown, the beam of the laser is divided into five paths by the beam splitter multiple times, and the deformation measurements in the x, y, and z directions are carried out respectively, where the z direction is the direction perpendicular to the high-speed camera 1, and the direction pointing to the high-speed camera 1 is positive; the x direction is the horizontal direction, positive as figure 1 shown; the y direction is determined by the right-hand rule; the origin is the center of the surface of the tested ...
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