Non-contact displacement and strain measuring method based on image feature recognition technology

A recognition technology and image feature technology, which is applied in the field of non-contact displacement and strain measurement based on image feature recognition technology, can solve the problems that the measurement accuracy of digital image correlation method cannot be guaranteed, the measurement environment is more demanding, and the correlation of speckle images decreases. , to achieve the effect of automatic data processing, mild experimental conditions, and improved accuracy and stability
CN109883333AInactive Publication Date: 2019-06-14WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2019-06-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a non-contact displacement and strain measuring method based on image feature recognition and matching. Experimental equipment and process required by the method are relativelysimple, and in the experimental process, one camera only needs to be used to shoot digital images of a tested material before and after deformation. Natural textures on the surface of the tested material can serve as mark speckles, and if the surface of the tested material is very balanced, the mark speckles can be obtained through a manual speckle making technology. Relatively speaking, a displacement and strain measuring technology based on image processing is simple in calculation and high in feasibility. For the non-contact loss-free measuring method, the textures and characteristics of the material are not lost, obtained data is more accurate, automatic data processing is realized, the change values of a full-field displacement, the width of a material structural member and the like can be obtained, and the environmental requirements are relatively low.
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Description

technical field

[0001] The invention relates to the field of non-contact displacement strain measurement, in particular to a non-contact displacement strain measurement method based on image feature recognition technology. Background technique

[0002] With the development of technology, people have higher and higher requirements for materials, among which the mechanical properties of materials and the bearing capacity of structures are the key to restricting the development of some high-tech. Displacement and strain are the most intuitive responses of materials under stress, and their measurement is also the most important mechanical experimental method for studying the mechanical properties of materials and evaluating the bearing capacity of structures. In the actual measurement, the experimental conditions of relatively harsh and complex environments, such as high temperature and radiation, have a great impact on the measurement and bring great difficulties to the measure...

Claims

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