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Method and device for detecting liquid level of PET bottle based on machine vision

A machine vision, liquid level detection technology, used in measuring devices, machines/engines, engine lubrication, etc., can solve the problems of low stability and low precision, and achieve better stability, strong light, and liquid level determination. accurate effect

Active Publication Date: 2016-10-26
HUNAN UNIV +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a PET (Polyethylene terephthalate, polyethylene terephthalate) bottle liquid level detection method and device based on machine vision. The problem of low performance and low precision

Method used

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  • Method and device for detecting liquid level of PET bottle based on machine vision
  • Method and device for detecting liquid level of PET bottle based on machine vision
  • Method and device for detecting liquid level of PET bottle based on machine vision

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0051] like figure 1 and figure 2 As shown, a PET bottle liquid level detection device based on machine vision, including an imaging system, an industrial control machine and a PLC control unit;

[0052] Both the imaging system and the industrial control machine are connected to the PLC control unit, and the imaging system is arranged on the side of the PET bottle conveyor belt;

[0053] The imaging system includes an industrial CCD camera 1, five mirror surfaces and two LED surface light sources;

[0054] The five reflective mirrors are sequentially the first reflective mirror 2, the second reflective mirror 3, the third reflective mirror 4, the fourth reflective mirror 5 and the fifth reflective mirror 6;

[0055] The two LED surface light sources are respectively the first LED surface light source 7 and the second LED surface light source 8;

[...

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Abstract

The invention discloses a method and device for detecting a liquid level of a PET bottle based on machine vision. The device comprises a camera, two area light sources, five reflection mirrors, an industrial control computer and a PLC control unit, wherein multi-angle images of the PET bottle are obtained through matched use of the five mirrors. The device has the advantages of a simple structure, convenient debugging, low cost and a rapid speed. The detection method is characterized in that a simple and efficient projection gradient method is used to obtain liquid level information, so that the liquid level of the PET bottle can be detected. The detection method disclosed by the invention has the advantages that accuracy is high; computation is quick and the liquid level of the PET bottle can be detected rapidly and accurately.

Description

technical field [0001] The invention belongs to the technical field of industrial automatic detection, and in particular relates to a method and device for detecting the liquid level of PET bottles based on machine vision. Background technique [0002] In the process of beverage filling, because the filling machine cannot guarantee the same filling volume each time, the filling volume may be too large or too small. If the filling volume is too large, the profit of the enterprise will be reduced, and if the filling volume is too small, the It affects the image of the enterprise, so it is a necessary link to detect the filling volume after the beverage is filled. At present, the filling volume detection methods in the beverage production line are usually human eye detection and ray detection. At present, ray detection and infrared detection are mostly used in the field , sonic detection, infrared heat detection and naked eye detection methods. Radiation detection is greatly a...

Claims

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Application Information

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IPC IPC(8): G01F23/00G06T7/00
CPCG01F23/00G06T7/0006G06T2207/30128
Inventor 王耀南郑叶欣蒋笑笑周显恩彭玉王海洲冯明涛范涛严佳栋黄森林刘学兵黄志鸿
Owner HUNAN UNIV
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