CN103698338B - A kind of method of inspection of quick identification Surface Defects in Steel Plate - Google Patents
A kind of method of inspection of quick identification Surface Defects in Steel Plate Download PDFInfo
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- CN103698338B CN103698338B CN201310718330.XA CN201310718330A CN103698338B CN 103698338 B CN103698338 B CN 103698338B CN 201310718330 A CN201310718330 A CN 201310718330A CN 103698338 B CN103698338 B CN 103698338B
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Abstract
The invention discloses the method for inspection of a kind of quick identification Surface Defects in Steel Plate, the method utilizes LED, by adjusting the light angle of science, distance and light beam, connect computer by video camera again, computer carries out image procossing, it is possible to more visual inspection and record Surface Defects in Steel Plate, the visual image that preservation can preserve for a long time, being used for the most qualitative, be effectively improved quality inspection and check on, effect is fine.The present invention provides that the method is simple and efficient, detection comprehensively, low cost, little to human injury, it is possible to long-term record preserves Surface Defects in Steel Plate, it is possible to effectively solve that steel plate outward appearance tiny defect is more and in the case of factory building insufficient light, the problem how to detect of steel plate.
Description
Technical field
The invention belongs to surface of steel plate detection technique field, be specifically related to the method for inspection of a kind of quick identification Surface Defects in Steel Plate.
Technical background
Over the past two years, because of iron and steel Market Situation continued downturn, client is the highest to the quality requirement of sheet material, especially the harshest to the appearance requirement of sheet material condition.Being restricted by aspects such as equipment, the technological process of production, peoplewares, such as, the tiny defect such as micro-crack, pit, little load mould is difficult to be found in the case of factory building insufficient light the steel plate that steel mill produces.And due to steel market dog-eat-dog, can sheet material have good serviceability then to become client's key selection standard, can the presentation quality of sheet material meet customer requirement becomes the decision decision most important condition.
At present, domestic iron and steel manufactures processing enterprise, in the quick context of detection of surface of steel plate, generally use artificial visual detection, the empirical data of Primary Reference detection person, because detection angles is random with detecting distance, result is caused to be affected by objective factor bigger, detection efficiency is low, and steel plate outward appearance tiny defect is more and in the case of the detection bad environments such as factory building insufficient light, relatively big to human eye injury, the confidence level of detection is low, lack uniformity and the science of detection, it is impossible to meet the rhythm demand that the biggest dimension produces.
Summary of the invention
In order to make up the deficiencies in the prior art, the present invention provides the method for inspection of a kind of quick identification Surface Defects in Steel Plate, the method is simple and efficient, detection is comprehensive, low cost, little to human injury, long-term record can preserve Surface Defects in Steel Plate, it is possible to effectively solve that steel plate outward appearance tiny defect is more and in the case of factory building insufficient light, the problem how to detect of steel plate.
The method of inspection of a kind of quick identification Surface Defects in Steel Plate, the instrument that described detection method uses includes: LED, video camera, computer.
The method of inspection of described quick identification Surface Defects in Steel Plate, specifically includes following steps:
1. Preliminary detection: respectively at steel plain direction and thickness direction, utilize the linear high light light beam of LED as light source, light source and steel plate angle 35 °, distance is 0.6 ~ 0.8m, video camera and steel plate angle are 30 °, distance is 0.6 ~ 0.8m, i.e. light source and video camera angle is 115 °, and sweep speed is 1s/m；
2. further detect that respectively at steel plain direction and thickness direction 1/2,1/4, utilize the linear high light light beam of LED as light source, light source and steel plate angle 40 °, distance is 0.2m, video camera and steel plate angle are 30 °, distance is 0.2m, i.e. light source and video camera angle is 110 °, and sweep speed is 2s/m.
The present invention tests through scene, in primary inspection process, at steel plain direction and thickness direction, utilizing the linear high light light beam of LED as light source, light source and steel plate angle 35 °, distance is 0.6 ~ 0.8m, video camera and steel plate angle are 30 °, distance is 0.6 ~ 0.8m, i.e. light source and video camera angle is 115 °, when sweep speed is 1s/m；Testing accuracy now is optimal, and the defect such as pit that surface of steel plate exists, scuffing, foreign matter press-in, crackle can quickly be found.Again by detection further, respectively at steel plain direction and thickness direction 1/2,1/4, utilize the linear high light light beam of LED as light source, light source and steel plate angle 40 °, distance is 0.2m, and video camera and steel plate angle are 30 °, and distance is 0.2m, i.e. light source and video camera angle are 110 °, and sweep speed is 2s/m；Identify the more defect such as the transverse crack of microcosmic, tiny pit further.The present invention utilizes LED, by adjusting the light angle of science, distance and light beam, quickly search and affect the fine surface defect of steel serviceability, connect computer by video camera again, computer carries out image procossing, it is possible to more visual inspection and record Surface Defects in Steel Plate, the visual image that preservation can preserve for a long time, being used for the most qualitative, be effectively improved quality inspection and check on, effect is fine.The present invention provides that the method is simple and efficient, detection comprehensively, low cost, little to human injury, effectively solve that steel plate outward appearance tiny defect is more and in the case of factory building insufficient light, the problem how to detect of steel plate.
Detailed description of the invention
Embodiment one
The method of inspection of a kind of quick identification Surface Defects in Steel Plate, specifically includes following steps:
1. Preliminary detection: at steel plain direction and thickness direction, utilizes the linear high light light beam of LED as light source, light source and steel plate angle 35 °, distance is 0.6m, and video camera and steel plate angle are 30 °, and distance is 0.6m, i.e. light source and video camera angle are 115 °, and sweep speed is 1s/m；
2. further detect that respectively at steel plain direction and thickness direction 1/2,1/4, utilize the linear high light light beam of LED as light source, light source and steel plate angle 40 °, distance is 0.2m, video camera and steel plate angle are 30 °, distance is 0.2m, i.e. light source and video camera angle is 110 °, and sweep speed is 2s/m；
Video camera is connected computer, computer carries out image procossing, visual inspection and record Surface Defects in Steel Plate, preserves the visual image that can preserve for a long time, be used for the most qualitative, be effectively improved quality inspection and check on.
Embodiment two
The method of inspection of a kind of quick identification Surface Defects in Steel Plate, specifically includes following steps:
1. Preliminary detection: at steel plain direction and thickness direction, utilizes the linear high light light beam of LED as light source, light source and steel plate angle 35 °, distance is 0.8m, and video camera and steel plate angle are 30 °, and distance is 0.8m, i.e. light source and video camera angle are 115 °, and sweep speed is 1s/m；
2. further detect that respectively at steel plain direction and thickness direction 1/2,1/4, utilize the linear high light light beam of LED as light source, light source and steel plate angle 40 °, distance is 0.2m, video camera and steel plate angle are 30 °, distance is 0.2m, i.e. light source and video camera angle is 110 °, and sweep speed is 2s/m；
Video camera is connected computer, computer carries out image procossing, visual inspection and record Surface Defects in Steel Plate, preserves the visual image that can preserve for a long time, be used for the most qualitative, be effectively improved quality inspection and check on.
Claims (1)
1. the method for inspection of a quick identification Surface Defects in Steel Plate, it is characterised in that: detection method uses
Instrument includes: LED, video camera, computer；Specifically include following steps:
1. Preliminary detection: respectively at steel plain direction and thickness direction, utilizes the linear high light light of LED
Shu Zuowei light source, light source and steel plate angle 35 °, distance is 0.6～0.8m, and video camera and steel plate angle are 30 °,
Distance is 0.6～0.8m, and i.e. light source and video camera angle are 115 °, and sweep speed is 1m/s；
2. further detect that respectively at 1/2, the 1/4 of steel plain direction and at the 1/2 of thickness direction, 1/4,
Utilizing the linear high light light beam of LED as light source, light source and steel plate angle 40 °, distance is 0.2m, takes the photograph
Camera and steel plate angle are 30 °, distance be 0.2m, i.e. light source be 110 ° with video camera angle, scanning speed
Degree is 0.5m/s.
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| CN201310718330.XA CN103698338B (en) | 2013-12-24 | 2013-12-24 | A kind of method of inspection of quick identification Surface Defects in Steel Plate |
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| CN201310718330.XA CN103698338B (en) | 2013-12-24 | 2013-12-24 | A kind of method of inspection of quick identification Surface Defects in Steel Plate |
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| CN103698338A CN103698338A (en) | 2014-04-02 |
| CN103698338B true CN103698338B (en) | 2016-08-24 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019050550A2 (en) * | 2017-09-11 | 2019-03-14 | Methode Electronics, Inc. | Pluggable module with coaxial connector interface |
| CN110656236A (en) * | 2018-06-28 | 2020-01-07 | 宝山钢铁股份有限公司 | Defect control method for laser scoring of surface of high-magnetic-induction oriented silicon steel |
| CN110146513B (en) * | 2019-05-27 | 2021-07-06 | Tcl华星光电技术有限公司 | Defect determination method and defect determination device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2691722Y (en) * | 2004-04-14 | 2005-04-13 | 宝山钢铁股份有限公司 | Composite illuminating device used for band steel defect inspection |
| CN101893580A (en) * | 2010-06-10 | 2010-11-24 | 北京交通大学 | Digital image based detection method of surface flaw of steel rail |
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2013
- 2013-12-24 CN CN201310718330.XA patent/CN103698338B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2691722Y (en) * | 2004-04-14 | 2005-04-13 | 宝山钢铁股份有限公司 | Composite illuminating device used for band steel defect inspection |
| CN101893580A (en) * | 2010-06-10 | 2010-11-24 | 北京交通大学 | Digital image based detection method of surface flaw of steel rail |
Non-Patent Citations (1)
| Title |
|---|
| 基于图像处理的钢板表面缺陷成像优化与深度信息提取方法研究;刘源泂;《中国博士学位论文全文数据库 工程科技Ⅰ辑》;20120515(第05期);第31页第"2.3.1 实验环境及光源测试与分析"节、第54页第"3.3.1 缺陷成像实验设计原理"节，第55页第"3.3.2 实验方案与专用成像平台实现"节、第50页第"3.2.1 成像系统基本参数分析与设计"节，第71页第2段，第73-74页第"3.5.2 缺陷最优成像规律分析与成像系统方案设计结果"节，第109页第"6.2.1 系统参数与成像光路"节 * |
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