Method and device for counting bar materials

A counting device and bar technology, applied in counting objects, counting of stacked items, counting mechanism/items, etc., can solve problems such as reliability decline, influence on alignment, deviation, etc., to reduce labor intensity and improve production efficiency , the effect of high accuracy

Active Publication Date: 2011-11-23
HEFEI BAISHENG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that ① the circular template is not suitable for all bars, even for bars of the same specification, the shape of the end face is still different, and the use of the same template will lead to a decrease in reliability; When the materials are close to each other and stacked, the found center may have a large deviation from the actual center
The disadvantage is that ① relying only on the coordinates to track the bar, the reliability is not high, because the bar moving laterally may be misaligned; frame alignment
[0014] ① Unreliability of "bar moving speed"
[0020] In short, none of the technical solutions provided by Documents 1 and 2 can solve the problem of reliable and accurate counting

Method used

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  • Method and device for counting bar materials
  • Method and device for counting bar materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for counting rods, comprising the steps of:

[0043] The image acquisition device collects the image of the end face of the bar and sends it to the computer;

[0044] Preprocess the image;

[0045]The "concave point method" is used to segment the connected domain so that the rods are separated from each other. The connected domain refers to a collection composed of several pixels. The pixels in this collection have the following characteristics: the gray levels of all pixels are less than or equal to The level of the connected domain; the pixels in the same connected domain are connected in pairs, that is, there is a path completely composed of the elements of this set between any two pixels. Use the "concave point method" to accurately separate the end face image of the adjacent bar into individual bars, with high reliability; use the "circumscribed rectangle method" to obtain the bar coordinates, that is, the connected domain that has been cut into a single ...

Embodiment 2

[0059] A bar material counting device includes an illumination light source, an industrial camera, a computer and auxiliary parts.

[0060] The illumination light source 10 and the industrial camera 20 are arranged in the incident and reflection directions with the end face 40 of the bar to be processed as the reflecting surface, and the industrial camera 20 adopts an area array industrial camera with a frame rate of more than 30 frames;

[0061] The computer 30 receives the image information collected by the industrial camera 20 and performs the following processing: preprocessing the image; using the "concave point method" to segment the connected domain so that the bars are separated from each other; using the "circumscribed rectangle method" to obtain the bar Material coordinates; combine the coordinates and the corresponding bar profile information into an "information pair"; match and count the information pairs to be processed in the current frame with the information pa...

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Abstract

The invention relates to a method and a device for counting bar materials which are loaded by a conveying device and belongs to the field of identification of computer images. The method comprises the following steps of: acquiring an image and transmitting the image to a computer; pre-processing the image; segmenting a communication region to separate the bar materials from one another; obtaining coordinates of the bar materials; combining information pairs; matching information; performing matching by two rounds; after two-round matching is performed, preserving the information pairs which are not matched in the current frame set; and eliminating the bar materials which are not matched in the previous frame set, increasing a counting value during eliminating, and repeating the steps. The device comprises an illumination light source, an industrial camera, a computer and accessories, wherein the illumination light source and the industrial camera are arranged in incidence and reflection direction in which end faces of the bar materials to be processed serve as reflecting surfaces; and the computer receives acquired image information and processes the acquired image information. The invention has the advantages that: accurate rate is high; real-time performance is good; and the labor intensity of workers is reduced during improvement of production efficiency.

Description

technical field [0001] The invention relates to a method and a device for counting rods shipped by a conveying device, belonging to the field of computer image recognition. Background technique [0002] Bar products produced by rolling mills are usually rolled with negative tolerances, bundled in fixed counts and sold at theoretical weights, so it is very important to achieve accurate counting of bars before bundling. [0003] There are three main methods for online bar counting: manual method, photoelectric pulse method and image processing method. [0004] Manual counting, due to the high labor intensity and large counting error, cannot meet the real-time requirements of online counting, and is being phased out. However, some bar manufacturers still use this method. [0005] The photoelectric pulse method requires a front-end mechanical device to flatten the stacked bars, but it is difficult for the mechanical device to make the bars pass before the sensor without overlap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06M9/00G06M1/272
Inventor 娄霆郑力新田永利张宏兵季幼平晏来成陈宇林伟镇
Owner HEFEI BAISHENG SCI & TECH
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