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Defect detection method and device for suspension spring and valve spring and storage medium

A valve spring and suspension spring technology, applied in the field of spring detection, can solve the problems of high cost and low efficiency

Pending Publication Date: 2021-03-09
湖南大捷智能装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a defect detection method, system, device and storage medium for suspension springs and valve springs, so as to solve the problems of high cost and low efficiency caused by manual detection for existing spring detection

Method used

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  • Defect detection method and device for suspension spring and valve spring and storage medium
  • Defect detection method and device for suspension spring and valve spring and storage medium
  • Defect detection method and device for suspension spring and valve spring and storage medium

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Experimental program
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Effect test

Embodiment 1

[0106] The present embodiment provides the defect detection method of suspension spring and valve spring, and before it detects, trains a spring defect classifier earlier, as figure 1 As shown, the specific training process is as follows:

[0107] Step 1: Obtain a number of spring images with defects, including pits, wear, and rust; among the three types of defects, pits are non-background destructive non-pattern background defects, and wear and rust are destructive non-pattern backgrounds defect. When acquiring images, the strip light of the red light source is used, and the low-angle lighting method is selected. The light source is direct light without frosted glass, and the light is illuminated along the axis. This lighting method can convert pit defects into contrasting non-pattern contrasting defects, which is convenient for detection and facilitates the subsequent detection of three types of defects through one algorithm.

[0108] Step 2: adopt sobel operator to carry ...

Embodiment 2

[0197] Such as Figure 7-12 As shown, this embodiment provides a spring defect detection device, including a two-dimensional translation platform 2, a spring installation mechanism 1, a rotation mechanism 3, a camera 5, and an industrial computer 4;

[0198] The spring installation mechanism 1 is installed on the two-dimensional translation platform 2, the rotation mechanism 3 is installed on the spring installation mechanism 1, and the camera 5 is installed above the two-dimensional translation platform 2;

[0199] The two-dimensional translation platform 2, the rotation mechanism 3, and the camera 5 are all electrically connected to the industrial computer 4;

[0200] The spring installation mechanism 1 is used to install and fix the spring 8 to be detected; the two-dimensional translation platform 2 is used to control the spring installation mechanism 1 to reciprocate; the rotating mechanism 3 is used to drive the installed spring 8 to be detected Rotate; the camera 5 is u...

Embodiment 3

[0213] This embodiment provides a computer-readable storage medium, which stores a computer program, and the computer program is suitable for being loaded by a processor and executing the defect detection method for suspension springs and valve springs as described in Embodiment 1.

[0214] Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

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Abstract

The invention discloses a defect detection method and device for a suspension spring and a valve spring, and a storage medium. The method comprises the steps: obtaining an image of a to-be-detected spring; carrying out edge detection on the image of the to-be-detected spring; connecting edges, screening defect edges according to a preset defect edge length range, and segmenting a spring defect image; extracting geometric features, gray features and texture features of the spring defect image; performing data normalization processing on all the features; carrying out principal component analysis on each feature to obtain a feature value of a corresponding correlation coefficient matrix and a corresponding contribution rate; wherein each characteristic value is sorted according to the contribution rate, and the first N characteristic values are selected; and inputting the first N characteristic values into a pre-trained spring defect classifier to obtain the defect type of the to-be-detected spring. According to the scheme, the efficiency and the accuracy of spring defect detection are greatly improved, workers are liberated from heavy and repeated work, and the time cost and the labor cost are remarkably reduced.

Description

technical field [0001] The invention relates to the technical field of spring detection, in particular to a defect detection method, device and storage medium for suspension springs and valve springs. Background technique [0002] Product quality inspection is the most important part of product production, and size and defect inspection are the main parts of spring quality inspection. It is important to measure the size of the product and detect the defect. The traditional size and quality inspection methods mainly rely on various mechanical measuring instruments and human eye inspection. The problems in the detection are as follows: [0003] 1) Quality inspection is labor-intensive work that requires a lot of manpower, and the cost of the company will increase with the increase in labor costs. [0004] 2) For employees, most of the quality inspections are assembly-line operations, requiring repeated physical labor, which is not conducive to the physical and mental health...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/13G06K9/62
CPCG06T7/0004G06T7/13G06F18/2135
Inventor 于秋爽谢晖
Owner 湖南大捷智能装备有限公司
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