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Light-transmitting container wall thickness detection apparatus and method based on machine vision

A light-transmitting container and machine vision technology, applied in the field of optical inspection, can solve problems such as low detection accuracy, resolution interference, and inaccurate thickness measurement, and achieve high-precision measurement results, good directional isolation, and high signal-to-noise ratio information Effect

Inactive Publication Date: 2016-10-12
BEIJING DAHENG IMAGE VISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In principle, it is very simple, but in practice, the number of light points collected by the CCD is more than two. In addition, there are two mirror imaging light points O' and O" at the laser emission point O facing the inner and outer walls. On the CCD imaging surface O Point ' is very close to point A, and point O" is very close to point B, which interferes with the resolution of spot A and point B, directly causing inaccurate wall thickness
In addition, the slight non-concentricity in the rotation of the bottle body will make the position of the incident light spot on the bottle body unstable, and there is a situation where the CCD target surface cannot be collected
It can be seen that this optical detection method has the disadvantages of inaccurate thickness measurement and low detection accuracy.
[0004] Therefore, the currently used laser imaging method for container wall thickness detection has serious problems, and it is difficult to meet the advantages of accuracy, efficiency, and ease of use in industrial production.

Method used

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  • Light-transmitting container wall thickness detection apparatus and method based on machine vision
  • Light-transmitting container wall thickness detection apparatus and method based on machine vision
  • Light-transmitting container wall thickness detection apparatus and method based on machine vision

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Embodiment 1

[0060] Such as figure 1 As shown, in this embodiment, the detection device includes: a detection lens 2, a spectroscopic system 3, a bright LED white light source 4, a fiber optic spectrometer 5, and a spectral data processing module 6 (implemented by a computer in this embodiment). figure 1 The glass bottle 1 to be tested, the transmission optical waveguide 7 and the data line 8 are also shown in .

[0061] The bright LED white light source 4 can emit white light as a continuous spectrum light source, can be applied to bottles of various colors, and has strong light output power. Of course, those skilled in the art should understand that the light source may be white light with different color temperatures, or a halogen light source or other light sources may be used.

[0062] The illumination light generated by the high-brightness LED white light source 4 is transmitted through the transmission optical waveguide 7 , one end of the transmission optical waveguide 7 is coupled...

Embodiment 2

[0070] In this embodiment, a more specific implementation manner is given.

[0071] image 3 The detailed structure of each component is drawn in . As shown in the figure, the light source 4 includes an LED white light bead 41, a first lens group 31-1, and a first optical waveguide interface 33-1 (SMA905). The optical splitting system 3 includes: the second optical waveguide interface 33-2, the third optical waveguide interface 33-3 and the fourth optical waveguide interface 33-4, the second lens group 31-2, the third lens group 31-3 and the fourth The lens group 31 - 4 and the optical splitting device 32 , the optical lens 2 includes the fifth optical waveguide interface 21 . The spectroscopic system 2 communicates with the light source 4, the fiber optic spectrometer 5 and the detection lens 2 through transmission optical waveguides 7-1, 7-2 and 7-3.

[0072] The light emitted by the LED white light lamp bead 41 becomes parallel light after being collimated by the first l...

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Abstract

The invention provides a light-transmitting container wall thickness detection apparatus and method based on machine vision. The light-transmitting container wall thickness detection apparatus comprises a light source, a light splitting system, a detection lens, a spectrum detection instrument and a data processing unit. According to the light-transmitting container wall thickness detection apparatus, through the lens with quite large axial dispersion, incident light is enabled to be separate at focus points with different wavelengths in an axial direction and be distributed at a tangent direction vertical to a point to be measured of a glass bottle. By use of the lens with a large-value aperture, it can be ensured that accurate thickness information can still be detected when the glass bottle is under centrifugation rotation to a certain degree. By use of a white LED white-light source, the apparatus is enabled to be applied to transparent glass bottles with various colors. The apparatus is applied to online rapid and accurate real-time detection of the machine vision. The apparatus and method can accurately and stably measure thickness information of an online rotation moving bottle body and provide a basis for quality detection of glass bottles and other light-transmitting containers. The apparatus can still be applied to thickness detection of such flat-plate-shaped objects as glass plates and the like.

Description

technical field [0001] The invention relates to the field of optical detection, in particular to a non-contact machine vision online glass bottle wall thickness detection device and method. Background technique [0002] At present, the empty bottle and pharmaceutical industries are developing rapidly, but the production technology of domestic enterprises is relatively backward, and substandard products are prone to appear in the production process. In order to ensure the quality of the product, various tests need to be carried out before the bottle leaves the factory, and the consistency of the wall thickness of the glass container product is an important indicator to ensure the quality of the glass bottle. Domestic glass bottle producers and processors currently mainly use contact glass bottle thickness measurement for detection, but this detection method has the disadvantages of low precision, low speed and high detection cost. A more stable, high-speed non-contact online ...

Claims

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Application Information

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IPC IPC(8): G01B11/06G01N21/84
CPCG01B11/06G01N21/84G01N2021/845
Inventor 李庆梅俞迪刘婕宇毛建森朱江兵潘津田立勋王亚鹏陈绍义
Owner BEIJING DAHENG IMAGE VISION
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