A laser coding method and device

Abstract

The present invention relates to a laser coding method and device, which are used for laser coding on cigarettes, comprising the following steps: S1, identifying the one-dimensional code on the cigarettes, and obtaining the type of the cigarettes; image, and obtain the posture information of the cigarette according to the cigarette image, determine the area suitable for coding, and record the position coordinates of the area; wherein, the posture information of the cigarette includes the distribution of the front and back feature positions of the cigarette and the inclination angle; S3. According to the posture information of the cigarette, control the marking mechanism to perform position compensation, and mark the code matching the type of the cigarette in the area according to the position coordinates. In this way, there is no need to correct the position of the cigarette, and only need to control the marking mechanism to perform position compensation, so that the flexible coding can be realized according to the actual posture of the cigarette, and the coding efficiency can be improved. In addition, the codes are all marked in the area suitable for coding, which improves the clarity of the code and facilitates identification.

Description

technical field [0001] The invention relates to the field of tobacco coding, in particular to a laser coding method and device. Background technique [0002] According to the relevant regulations of the State Tobacco Monopoly Administration, cigarettes sold by tobacco companies at all levels must be coded when they leave the warehouse. At present, the method of marking cigarettes is to use a laser marking machine to mark a 32-digit code on each cigarette, which is used for anti-counterfeiting, anti-smuggling and information query. [0003] Among them, the laser marking machine mainly uses fixed-point marking for marking. For example, a precise identification and labeling marking system whose publication number is CN108372964A firstly needs to use the posture correction mechanism 12 to carry out the packaging box 1 on the conveying line 11. Posture correction, then the coding mechanism 15 performs laser marking and numbering operations on the packaging box 1 according to the...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned marking method has the following disadvantages: 1. Before laser marking, it is necessary to correct the posture of the cigarette, which affects the marking efficiency

2. The coding mechanism can only perform fixed-point flying marking. However, the surface material of cigarettes is diverse and the colors are complex. If the number mark is on a solid color area, it is easy to identify, otherwise it is not easy to identify

Since not all cigarettes have the same upward surface, the above-mentioned coding mechanism can only perform fixed-point marking at a single position, and cannot compensate according to the actual position, resulting in the serial numbers of some cigarettes being marked in non-solid color areas. It is difficult to identify

3. When the marking content is a 32-digit digital code or a two-dimensional code, two methods, the coding mechanism and the labeling mechanism, are used. The labeling is made of paper material, which has large consumables, is easily damaged, and has low efficiency.

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