Digital shot blasting coverage rate measurement method based on computer vision technology

A technology of computer vision and measurement method, applied in the direction of calculation, measurement device, image data processing, etc., can solve the problems of multi-manpower and material resources, time, high measurement cost, low measurement efficiency, etc., and achieve low execution difficulty, low measurement cost, good compatibility

Inactive Publication Date: 2020-05-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual implementation of this invention still requires a lot of manual operations, and personnel are required to perform brightness statistics and fitting calculations for many times. In addition, standard samples need to be given for each measurement, and original images from many angles are taken, which makes the measurement work laborious. The amount is large, it consumes more manpower, material resources and time, the measurement efficiency is low, and the measurement cost is high

Method used

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  • Digital shot blasting coverage rate measurement method based on computer vision technology
  • Digital shot blasting coverage rate measurement method based on computer vision technology
  • Digital shot blasting coverage rate measurement method based on computer vision technology

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Embodiment Construction

[0035] The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0036] A kind of digital shot peening coverage measuring method based on computer vision technology of the present invention comprises the following steps:

[0037] Step 1: Use a microscope with a magnification range of 50-200 times and the image acquisition software amcap to obtain the initial image;

[0038] With the help of a microscopic magnifying glass with a magnification of 50-200 times, and the supporting image display and acquisition software amcap installed on the computer, select a representative area on the surface of the shot peened sheet to take pictures and save them as 480*640 pixels Color png format image. The principle of shooting is: if the coverage rate of the shot blasting sheet is low, such as below 30%, or it is difficult to select a representative area in a sh...

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Abstract

The invention discloses a digital shot blasting coverage rate measurement method based on a computer vision technology, and belongs to the technical field of digital image processing. The method comprises the steps of image acquisition, gray scale conversion, noise elimination, region segmentation, binarization processing, filling, pseudo connection elimination and statistics, and image processingfor surface dents after shot blasting of a plate. A computer program is adopted for shot blasting image processing, the consistency of multiple times of measurement is guaranteed, the measurement error is controlled within 5%, the measurement and calculation speed is high, the method does not depend on personal experience, the compatibility with other computer-aided manufacturing equipment is good, the portability is good, and possibility is brought to detection feedback link work in automatic shot blasting control circulation.

Description

technical field [0001] The invention belongs to the technical field of digital image processing, and in particular relates to a digital shot peening coverage measurement method based on computer vision technology. Background technique [0002] Shot peening is a cold working process for metal parts that involves impacting the part with a defined shot. The compression of the metal surface brings residual compressive stress, which in turn strengthens the metal to prevent fatigue damage and corrosion damage. Using this process can prolong the service life of parts and produce ideal metal plastic deformation. During the shot peening process, the impact of a large number of projectiles on the plate leaves a large number of dents on the surface of the plate. The ratio of the area covered by these dents to the total surface area of ​​the plate is the definition and calculation method of coverage. [0003] Usually, the coverage area is measured by visual inspection after shot peenin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/11G06T7/136G06T7/194G06T7/60G06T5/00G01B11/28
CPCG06T7/11G06T7/136G06T7/194G06T7/60G06T5/002G01B11/28G06T2207/10004G06T2207/20032G06T2207/30108
Inventor 张景博邹男张炜高国强张贤杰
Owner NORTHWESTERN POLYTECHNICAL UNIV
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