Dynamic environment three-dimensional deformation detection digital speckle interference system and detection method

Abstract

The invention provides a dynamic environment three-dimensional deformation detection digital speckle interference system and a detection method, and the system comprises a double-laser light source, a double-channel digital shear speckle interference system, a single-channel digital speckle interference system, a data collection system, a mechanical loading device and a computer. The phase distribution of two shearing speckle patterns and one speckle interference pattern acquired by an image sensor of a data acquisition system is calculated respectively, and finally, according to data of the phase distribution, reference sharing and integral operation are adopted to complete reconstruction and analytical operation of three-dimensional deformation information. According to the dynamic environment three-dimensional deformation detection digital speckle interference system and the detection method, DSPI and DSSPI technologies are combined, synchronous, real-time and online measurement of three-dimensional deformation in a dynamic environment is realized, the system cost is greatly reduced, the multi-channel data calibration problem is avoided, and the measurement process is simplified.

Description

technical field [0001] The invention relates to the technical field of precision instruments and micro-deformation measurement in a dynamic environment, in particular to a digital speckle interference system and a detection method for three-dimensional deformation detection in a dynamic environment. Background technique [0002] With the development of modern engineering materials and medical technology, new bionic joints and prosthetics have been widely used in the rehabilitation of physically disabled people. However, there are still many difficulties to be overcome during the installation of bionic joints and prosthetics. One of the most important challenges is how to obtain three-dimensional matching information between the harder implant and the softer bone surface in a dynamic environment. Matching information is critical to prevent loosening, misalignment, potential infection in interfacial gaps, or osteonecrosis, and often emerges through 3D strain and microdeformat...

AI Technical Summary

Problems solved by technology

Unfortunately, at present, 3D (three-dimensional) deformation detection methods are still unable to meet the detection needs in dynamic environments

[0003] At present, the existing three-dimensional deformation measurement methods are mostly multi-channel or multi-sensor measurement technologies based on time-phase shift technology. The existing problems include: 1) Multi-sensor (at least 3) measurement technology has complex optical paths and high costs , the late data processing is complex and requires precise data alignment; 2) The system space optical structure of the multi-light source (at least 3) measurement technology is complex and the cost is high; 3) The dynamic measurement capability of the existing DSPI time phase shift technology is poor, and the measurement not effectively

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