A machine vision-based mirror imaging bottle cap surface labeling detection system and method
A machine vision and detection system technology, applied in labeling machines, labels, optical testing flaws/defects, etc., can solve problems such as slippage, incompleteness, inapplicability, etc., to achieve high system detection efficiency, high detection accuracy, mechanical low cost effect
Active Publication Date: 2020-04-03
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology
[0005] (1) Use the friction wheel rotation technology combined with the line array camera to detect the cylindrical surface information of the bottle cap. Although the image accuracy is guaranteed, due to the time-consuming friction wheel rotation and the time-consuming start-stop of the friction wheel with the conveyor belt, the system detection speed can only reach a maximum 120 pcs / min
In order to reduce production costs, it is necessary to improve the detection efficiency and detect more than 300 per minute. Obviously, this method is not applicable
[0006] (2) The bottle cap may slip when it rotates with the friction wheel. When it slips, the collected image information of the bottle cap will be incomplete, which will seriously affect the labeling detection of the bottle cap. It is likely that the labeled bottle cap will be regarded as missing bottle cap knocked out
[0007] (3) There may be additional vibration that interferes with the stable operation of the friction wheel
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[0039] All the features disclosed in this specification, or all disclosed methods or steps in the process, except for mutually exclusive features and / or steps, can be combined in any manner.
[0040] Any feature disclosed in this specification, unless specifically stated, can be replaced by other equivalent or equivalent alternative features. That is, unless otherwise stated, each feature is just one example of a series of equivalent or similar features.
[0041] A machine vision-based mirror imaging bottle cap surface labeling detection system, which is characterized by comprising a conveyor belt, an action trigger system, a mirror imaging system, a reject control system, and a reject system. The action start system includes a light trigger sensor and an ultrasonic wave Ranging sensor; the mirror imaging system includes an area scan camera, a camera bracket and a plane mirror; the rejecting control system includes a host computer and a programmable logic controller; the rejecting ...
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The invention discloses a mirror surface imaging bottle cap surface labeling detecting system and method based on machine vision. The system comprises a conveying belt, an action triggering system, a mirror surface imaging system, a rejection control system and a rejection system, wherein the action triggering system comprises a light triggering sensor and an ultrasonic distance measuring sensor; the mirror surface imaging system comprises an area-array camera, a camera support frame and a plane mirror; the rejection control system comprises an upper computer and a programmable logic controller; the rejection system comprises a spray nozzle, a rejection box and a falling prevention cover plate. The detecting system and the detecting method have the advantages that the structure is simple; the mechanical cost is low; the bottle cap labeling detecting speed is high; the system detecting efficiency is high; meanwhile, the bottle cap slipping phenomenon does not exist; the bottle cap labeling detecting accuracy is high.
Description
Technical field [0001] The invention relates to the field of machine vision and industrial product quality inspection, in particular to a mirror imaging bottle cap surface labeling inspection system and method based on machine vision. Background technique [0002] Before liquor bottle caps leave the factory, an automatic labeling machine must be used to paste the trademark on the cylinder of the cap. Since the automatic labeling machine may miss the label during normal operation, it is necessary to perform labeling detection on the bottle cap. If manual detection is used, it will consume a lot of human resources and the detection efficiency is not high. Therefore, a type of automatic detection device is needed to quickly detect whether the bottle cap is labeled or not. [0003] At present, machine vision technology is more and more widely used in the field of automatic inspection. The existing methods for labeling inspection of liquor bottle caps mainly use the cooperation of a li...
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IPC IPC(8): B65C9/40G01N21/88
CPCB65C9/40G01N21/88
Inventor 黄丹平徐同旭田建平胡勇于少东杨海栗
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING