Laser speckle device for measuring out-of-plane and in-plane displacement of objects and measurement method

Abstract

The invention discloses a laser speckle device for measuring the out-of-plane and in-plane displacement of objects and a measurement method. According to the device of the invention, a laser is adopted as a light source; a collimation beam splitter, beam splitters, focusing mirrors, a total-reflection mirror and other optical devices are adopted to form an in-plane displacement and out-of-plane displacement integrated measurement optical system; by means of temperature control devices, display devices and heating sheets, the environment temperature of a measured object can be automatically changed, at the same time, the in-plane displacement and out-of-plane displacement of the same object or different objects can be tested; and a novel in-plane displacement sample holder and an out-of-plane displacement sample holder are adopted, so that the range of test samples can be further extended. The laser speckle device and measurement method of the invention have the advantages of high intelligent degree, high precision, real-time monitoring, wide application range, high flexibility, great convenience and high comprehensiveness, and are suitable for being widely applied to many fields such as industry, agriculture, forestry and biomedicine.

Description

technical field [0001] The invention relates to a laser speckle device, in particular to a laser speckle device and a measurement method for simultaneously measuring out-of-plane displacement and in-plane displacement of an object under different temperatures and pressures, and is suitable for use in industry, agriculture, forestry, biomedicine, etc. Widely used in many fields. Background technique [0002] Laser speckle measurement is one of the most important measurement methods in the field of optical measurement. Due to its advantages of fast, real-time, high precision, non-destructive testing, full-field non-contact, high sensitivity, and simple structure, it is widely used in object morphology. , deformation measurement, damage detection and other fields. At present, laser speckle method to measure object deformation, contour and micro-displacement measurement mostly focuses on the separate measurement of object in-plane displacement and object out-of-plane displaceme...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a laser speckle device and measurement method for measuring the out-of-plane and in-plane displacement of objects, so as to solve and compensate for the single measurement content and the shape of the measured object in the existing laser speckle devices and technologies. Limitation, limited material, uneven heating temperature of objects and other defects, to realize the measurement of out-of-plane displacement and in-plane displacement of more objects of different materials and shapes under different conditions

Images