Bar counting method based on machine vision

A technology of machine vision and counting method, applied in instruments, computing, image data processing, etc., to reduce costs, improve accuracy, and improve accuracy and efficiency.

CN105718989AInactive Publication Date: 2016-06-29SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI +1
3 Cites 23 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-06-29
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a bar counting method based on machine vision. The method comprises the steps of acquiring end face images of bars, pre-processing the images, calculating the relative displacement of the bars, analyzing a connected area, counting matched bars, determining the positions of steel bar splitting lines, judging whether the primary steel bar splitting result is accurate or not and the like. Pre-processing of the images comprises smoothing, binaryzation and morphological operation; and analysis of the connected area comprises the steps of splitting stuck bars into single bars and then analyzing the information of the single bars using the connected area again. The method based on machine vision technology realizes automatic counting of bars and judgment of the steel bar splitting result, effectively solves the problems of overlapping and crossing of bars, is high in speed and accuracy, small in modification of a production line and easy to maintain, and greatly reduces the manpower cost of enterprises in production.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of counting in the production process of rods, in particular to a method for counting rods based on machine vision. Background technique

[0002] Bars are the most consumed steel species in my country. The bar products produced by steel rolling enterprises are usually rolled with negative deviation, fixed count and bundled, and delivered by theoretical weight. This is also the common demand of manufacturers and customers. Therefore, the actual bar Accurate counting before baling is very important.

[0003] At present, my country's steel mills mainly use two methods of manual counting and photoelectric detection in terms of bar counting. If it does not match, it cannot meet the real-time requirements of online counting of bars, and becomes the speed bottleneck in the automatic production process of bars; at the same time, the manual counting method has large counting errors and high labor costs, and this method is being...

Examples

Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] figure 1 It is the overall flow chart of the present invention, including collecting bar images, preprocessing the images such as smoothing, binarization, and morphological operations, calculating the relative displacement of the bars, performing connected domain analysis on the bars, and connecting the bars with the previous frame. Material comparison and matching counting, if the count value has not yet reached the number of steel points, the above operation counting will continue in the next frame until the count value reaches the number of steel points, control the conveyor chain to stop, and determine the position of the steel line, control the steel machine to carry out After the initial steel division, judge whether the result of the initial steel division is correct. If it is not correct, the initial steel division will be carried out again. Af...