Laser interferometer for measuring in-plane deformation and strain field of materials and its application method

Abstract

The invention discloses a laser interferometer used for material surface inner deformation and strain field measurement, and an application method. A slide table set is composed of one long-stroke slide table and two short-stroke slide tables, the long-stroke slide table is fixed on an installation panel, the two short-stroke slide table are vertical to each other, and the installation panel is a T-shaped panel and is used for installing the slide table set, support circular pipes, angle pointers and an interferometer base; the two support circular pipes are respectively disposed at the two sides of the slide table set and are equally distanced from the slide table set; the input ends of fiber collimators are connected with fibers, and collimation parallel light whose light beam diameter is 50 mm is obtained at output ends; lens barrel clamps are fixed at the end portions of the support pipes and are used for installing the fiber collimators; the interferometer base is used for adjusting and fixing the space position of the interferometer, and the interferometer base is connected with the installation panel through a bolt; one end of each support circular pipe is connected with the panel and the angle pointers, and the other ends of the support circular pipes are connected with the lens barrel clamps; and an industrial CCD camera is fixed on the short-stroke slide table of the slide table set through a connecting plate.

Description

technical field [0001] The invention relates to a laser interferometer for measuring in-plane deformation and strain field of a material and a use method thereof, belonging to the technical field of laser interferometers. Background technique [0002] When a material is subjected to an external load, its surface will deform and strain. The distribution information of the strain field on the surface of the material can be obtained through the test, and the stress state of the local position of the material and the internal defect information of the material can be obtained by calculation, which provides an important basis for the evaluation of the quality of material manufacturing and the evaluation of structural service reliability. [0003] For the measurement of material deformation and strain, the current commonly used method is the electric measurement method, that is, the resistance strain gauge is pasted on the measured position, and the change in the resistance value ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that existing laser speckle test systems have cumbersome and complicated process of adjusting the optical path and poor flexibility, which can only be used for laboratory measurement and analysis, and cannot be used for on-site measurement of actual components with large dimensions and complex spatial shapes. , and further provide a laser interferometer for in-plane deformation and strain field measurement of materials and its use method

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