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Real-time displacement field and strain field detection method, system and device and storage medium

A detection method and strain field technology, applied in special data processing applications, image analysis, instruments, etc., can solve the problems that the real-time displacement field detection system is rarely involved, and achieve the effects of fast processing speed, accurate results and high efficiency

Active Publication Date: 2021-01-15
GUANGZHOU UNIVERSITY
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Problems solved by technology

[0005]However, in the existing DIC measurement system, the real-time displacement field detection system is rarely involved, and the DIC systems on the market are basically offline detection systems

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  • Real-time displacement field and strain field detection method, system and device and storage medium
  • Real-time displacement field and strain field detection method, system and device and storage medium
  • Real-time displacement field and strain field detection method, system and device and storage medium

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Embodiment Construction

[0062] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0063] refer to figure 1 , the present embodiment discloses a real-time displacement field and strain field detection method, the method can be executed by a computer, the method of the present embodiment includes the following steps:

[0064] Step 101. Acquire a first image, which is an initial surface image of the object to be tested.

[0065] It should be understood that, in this embodiment, the initial image of the object under test refers to a state without deformation, or refers to an image of the object under test before being subjected to a test force. refer to figure 2 , shows the characteristic changes of the surface of the object before and after being subjected to strain. on the surface of an object I 1 There is a characteristic region I in 0 , when the object undergoes a certain deformation, the surface I of the object 1 The...

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Abstract

The invention discloses a real-time displacement field and strain field detection method, system and device, and a storage medium, and relates to the machine vision technology, and the method comprises the following steps: obtaining a first image and a first configuration parameter; segmenting the first image according to the first configuration parameter to obtain a plurality of first sub-images;extracting a first feature of each first sub-graph; obtaining a second image and a second configuration parameter; segmenting the second image according to the second configuration parameter to obtain a plurality of second sub-images; carrying out feature search according to the first features of the first sub-graphs, determining second positions of the first features of the first sub-graphs in the corresponding second sub-graphs, and obtaining second center coordinates of the first sub-graphs according to the second positions; and obtaining a strain field according to the first center coordinate and the second center coordinate of each first sub-graph. The scheme can greatly improve the detection efficiency of the strain field.

Description

technical field [0001] The invention relates to machine vision technology, in particular to a real-time displacement field and strain field detection method, system, device and storage medium. Background technique [0002] Real-time deformation data such as displacement field and strain field are often required in engineering problems. At present, there are many methods for measuring the small deformation of objects, such as: sticking strain gauges, grating method, electronic speckle interferometry, digital image correlation method and so on. Among them, the digital image correlation method is more and more widely used because of its advantages of simple optical path, high precision and non-contact. [0003] The detection of the deformation and displacement of the surface of the existing object usually uses strain gauges or extensometers to be pasted on the surface of the deformed object, and the displacement and deformation are converted into resistance or other electricit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/10G06F30/20
CPCG06T7/001G06T7/10G06F30/20
Inventor 王文龙莫迪威张春良
Owner GUANGZHOU UNIVERSITY
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