Three-dimensional deformation wireless optical measurement system for engineering structure and measurement method thereof

Abstract

The invention relates to a three-dimensional deformation wireless optical measurement system for an engineering structure and a measurement method thereof. The system comprises a light source, three wireless image transmitting ends and a wireless image receiving end, wherein the light source irradiates a deformation position to be measured on an engineering structure; a three-dimensional coordinate system is established by taking the deformation position to be measured on the engineering structure as a center; the three wireless image transmitting ends are respectively fixed on axes x, y and z of the three-dimensional coordinate and used for acquiring images of the deformation position to be measured on the engineering structure and transmitting the image to the wireless image receiving end in a wireless way on the basis of ZigBee protocol. In the invention, the deformation position to be measured on the engineering structure is determined on the surface of an engineering structure to be measured, the wireless image transmitting ends are used for acquiring images of the deformation position to be measured before and after deformation and at different times and forming a data file; since the wireless image receiving end calculates deformation by using a sub-pixel displacement measurement algorithm and sends calculation results remotely. The system has the advantages of simple structure, good adaptability and high accuracy.

Description

technical field [0001] The invention belongs to the technical field of deformation measurement of engineering structures, is used for measuring deformation of engineering structures and materials in the field of optical mechanics, and is a wireless optical measurement system for three-dimensional deformation of engineering structures and a measurement method thereof. Background technique [0002] The deformation of the structure or material surface under the action of some reason may be encountered in many engineering fields. In recent years, optical testing technology based on digital image analysis has developed rapidly, such as laser interferometry, digital holography, speckle interferometry, grid line projection technology, etc. Generally, the CCD camera is used to obtain the images of the feature points before and after the deformation of the object or at different deformation moments, and the captured video signal is transmitted to the control computer and forms a data...

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Problems solved by technology

[0003] The problem to be solved by the present invention is: the measurement of engineering structure and material deformation in the field of optical measurement mechanics is slow, and the moving objects cannot be photographed, and the flashlight cannot be used, so the effectiveness of optical measurement cannot be guaranteed; There are many connecting lines, especially when measuring the deformation of three-dimensional structures or large components, there are more on-site wiring, and the measurement device is complicated, which is easily limited by the site

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