Quality detection device of seamless steel pipe and detection method

A technology for seamless steel pipes and detection devices, which is applied to measurement devices, optical devices, optical testing of flaws/defects, etc., can solve the problems of difficult algorithm maintenance and high hardware costs, and achieve high precision, high detection speed and detection accuracy. Effect

Active Publication Date: 2018-10-16
GUANGXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The two systems have high hardware costs, and algorithm maintenance is difficult

Method used

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  • Quality detection device of seamless steel pipe and detection method
  • Quality detection device of seamless steel pipe and detection method
  • Quality detection device of seamless steel pipe and detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] refer to figure 1 , a seamless steel pipe quality inspection device, the cabinet 1 is provided with a console 2 and a sequentially connected first conveyor belt 3 electrically connected to the console 2, a first rotary table 4, a first light source unit 5, and an industrial camera 6. The second light source unit 7, the second rotary table 8 and the second conveyor belt 9, wherein the first light source unit 5 is provided with a first ring light source 5-1 and the second ring light source 7 on the second light source unit 7 -1 is irradiated with light in opposite directions, and the illumination ranges of the first ring light source 5-1 and the second ring light source 7-1 partially overlap, the first ring light source 5-1 is provided with a first perforation 11, and the second ring light source 7-1 A second perforation 12 is opened on the top, and the industrial camera 6 takes pictures of the seamless steel pipe to be inspected passing between the first perforation 11 a...

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Abstract

The invention discloses a quality detection device of a seamless steel pipe and a detection method. The method comprises the following steps: 1) collecting pictures; 2) obtaining a difference graph; 3) obtaining a binary graph of the difference graph; 4) obtaining an edge graph; 5) finding a diameter characteristic point pair; 6) fitting diameter characteristics in step 5) into two straight lines;7) calculating the average diameter of the to-be-detected steel pipe; 8) calculating the midline of the two straight lines obtained in step 6); 9) saving an image of a detection area; 10) obtaining abinary map of the detection area; 11) obtaining a new binarization graph; 12) saving each connected component picture; 13) judging whether each connected component belongs to a background or a defect; 14) drawing a conclusion. According to the method, diameter and surface defect information of the seamless steel pipe can be accurately measured from one picture for detection, and quality of the steel pipe can be judged according to detection results. The invention further discloses the quality detection device of the seamless steel pipe.

Description

technical field [0001] The invention relates to a seamless steel pipe quality detection technology, in particular to a seamless steel pipe quality detection device and a detection method. Background technique [0002] At present, most seamless steel pipe production enterprises still use manual measurement to detect the surface defects of seamless steel pipes, which not only affects the production speed, but also is prone to missed inspections and wrong inspections, resulting in large rework rate, affecting production efficiency. Therefore, how to quickly and accurately detect the surface defects of seamless steel pipes is a technical problem to be solved urgently by those skilled in the art. [0003] The quality of seamless steel pipes includes: steel pipe diameter and surface defects. [0004] At present, the detection methods in the detection field are all for detection of a certain indicator. For example, only detect diameter or only detect surface defect information. ...

Claims

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Application Information

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IPC IPC(8): G01N21/89G01N21/892G01N21/88G01B11/10G06T7/00G06T7/13G06T7/187
CPCG01B11/105G01N21/8851G01N21/8914G01N21/892G01N2021/8854G01N2021/8887G01N2021/8918G06T7/0004G06T7/13G06T7/187G06T2207/10004G06T2207/20224G06T2207/30136
Inventor 朱勇建王泽朱立新唐楚柳彭柯
Owner GUANGXI NORMAL UNIV
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