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Automatic large-size workpiece measurement system based on machine vision

An automatic measurement and machine vision technology, applied in the field of visual measurement, can solve problems such as low efficiency and large errors, and achieve the effect of removing noise

Active Publication Date: 2019-04-12
江苏聚目科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system hardware of the present invention is stable, the algorithm is robust, can solve the shortcomings of low efficiency and large error of the current measurement method, can be used for automatic measurement of large-sized workpieces, and has good practical value

Method used

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  • Automatic large-size workpiece measurement system based on machine vision
  • Automatic large-size workpiece measurement system based on machine vision
  • Automatic large-size workpiece measurement system based on machine vision

Examples

Experimental program
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Embodiment 1

[0075] A kind of automatic measurement system of large-size workpiece based on machine vision of the present invention, such as figure 1 As shown, including the table, the steel plate workpiece to be tested, the transmission device, the camera lens and the light source.

[0076] The camera lens is set under the transmission device, the light source is set under the camera lens, the steel plate workpiece to be tested is placed on the workbench, and the workbench is placed under the light source.

[0077] The light source can generally be set as a backlight light source and a forward light source; the back light source can usually obtain higher contrast, and the forward light source can obtain the surface information of the workpiece to be measured; the light source in this embodiment is set as a forward light source. However, in the process of image acquisition, if there is no suitable light source, the captured image will have different brightness and darkness, which will brin...

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Abstract

The invention discloses an automatic large-size workpiece measurement system based on machine vision, and belongs to the technical field of machine vision measurement. The automatic large-size workpiece measurement system comprises an automatic large-size workpiece measurement hardware system and an automatic large-size workpiece measurement software system. The automatic large-size workpiece measurement hardware system comprises a light source, a camera, a lens and a high-accuracy moving device. The automatic large-size workpiece measurement software system comprises an image preprocessing algorithm, image data conversion modeling, a subpixel line / arc detection algorithm based on an improved RANSAC, and dimension calculation. The large-size workpiece can be measured by the system, and thesystem fills in the blank of application of machine vision in the field of large-size workpiece measurement. The software system can effectively eliminate noise and null points from an image and canrectify a non-uniform background. Production efficiency, stability and measurement accuracy of the system are improved.

Description

technical field [0001] The invention relates to an automatic measurement system for large-size workpieces based on machine vision, which belongs to the field of visual measurement. Background technique [0002] In recent years, with the rapid development of aerospace, large-scale shipbuilding, mining and new energy industries, the demand for large-sized workpieces in the market is increasing, and the requirements for measurement accuracy are also getting higher and higher. At present, the measurement method of large-sized workpieces is mainly manual measurement, but there are many problems in this measurement method: (1) low accuracy of manual measurement; (2) poor real-time performance, low efficiency, and increased product cost; (3) stability Not high, manual measurement accuracy is often affected by the operator's own emotions. Therefore, measurement methods based on machine vision have been developed rapidly. [0003] Machine vision is the use of computers to process i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G06T5/20G06T7/00G06T7/13G06T7/62
CPCG01B11/00G06T5/20G06T7/0004G06T7/13G06T7/62G06T2207/10024G06T2207/20024G06T2207/20104G06T2207/20192G06T2207/30164
Inventor 冯西吴静静安伟
Owner 江苏聚目科技有限公司
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