Dynamic measurement method of visual extensometer for virtual punctuation

A technology of dynamic measurement and extensometer, applied in calculation, computer parts, image analysis, etc., can solve the problem of large measurement error of dotting machine, achieve the effect of solving large measurement error, reducing failure rate, and precise dotting

Pending Publication Date: 2019-04-16
GUANGZHOU UNIVERSITY
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Problems solved by technology

[0003] The invention provides a visual extensometer dynamic measurement method for virtual punctuation to solve the technical problem of large measurement errors in traditional dotting machines, thereby eliminating errors, obtaining accurate measurement data, and reducing the failure rate of experiments

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  • Dynamic measurement method of visual extensometer for virtual punctuation
  • Dynamic measurement method of visual extensometer for virtual punctuation
  • Dynamic measurement method of visual extensometer for virtual punctuation

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] Please refer to figure 1 , the preferred embodiment of the present invention provides a kind of visual extensometer dynamic measurement method of virtual punctuation, comprising

[0029] Fix the experimental material at both ends of the tensioner;

[0030] Turn on the LED light source, and use an industrial camera to collect images of the experimental materials;

[0031] Use the calibration board to calibrate the captured image, and convert the coordinates...

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Abstract

The invention discloses a Dynamic measurement method of visual extensometer for virtual punctuationS. The method comprises the following steps: fixing an experimental material at two ends of a chest expander; Carrying out image acquisition on the experimental material by using an industrial camera; Calibrating the acquired image by using a calibration plate; Setting virtual punctuation points forthe image after coordinate conversion, setting a point at each of two ends in the image, drawing a line segment, setting the number N of required punctuation points on the line segment, and generatingN areas with equal distances between every two areas; Training the generated area into an image template; Starting the chest expander to enable the experimental material to deform under stress, and continuously acquiring updated images until the material is broken; Matching the acquired and updated images by utilizing the created image templates, and recording the positions of the images; After matching of each image is completed, the displacement between every two areas is calculated, the total displacement is used as a Y-direction coordinate, the tension data of the chest expander is used as an X-direction output, and a tension curve is drawn in real time.

Description

technical field [0001] The invention relates to the field of machine vision measurement, in particular to a dynamic measurement method of a visual extensometer for virtual punctuation. Background technique [0002] There are many problems in the traditional marking machine, such as time-consuming and labor-intensive marking, and the marking machine is a consumable product. After the marking is broken, the error of manual splicing of the fracture is very large, and different workers operate differently; The diameter of a point is about 1 mm. When using a caliper to measure the distance, plus the measurement error of the human eye, the final distance measurement error easily exceeds 1 mm. Due to the large error, accurate data cannot be measured, which greatly increases the failure rate of the experiment. , therefore, there is a great need in the market for a method that can eliminate errors and obtain accurate measurement data. Contents of the invention [0003] The inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/30G06T7/73G06K9/62
CPCG06T7/30G06T7/73G06F18/22
Inventor 谢宏威骆佩文雷臻宇周聪陈磊
Owner GUANGZHOU UNIVERSITY
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