钢板表面质量是钢板质量的重要指标之一，表面质量的优劣直接影响其最终产品的质量与性能。

The surface quality of steel plate is one of the most important indexes for the quality of steel plate.

在钢板加工过程中，由于原材料、轧制设备和工艺等多种原因，常常导致钢板表面出现结疤、裂纹、辊印、刮伤、针眼、鳞皮、孔洞、麻点等各种缺陷。这些缺陷不仅影响到产品的外观，而且降低了产品的抗腐蚀性、耐磨性和疲劳强度等性能。如何在生产过程中快速检测钢板的表面质量，有效控制和提高产品的表面质量，降低产品的次品率，提高劳动生产效率，对于钢板加工企业具有十分重要的现实意义。

In steel processing, as raw materials, rolling equipment and technology and other reasons, often cause scarring, cracks, scratches, roller, needle, scale, holes, pits and various defects in the surface of the steel plate. These defects not only affect the appearance of the product, but also reduce the corrosion resistance, wear resistance and fatigue strength. How the quality of the steel plate surface rapid detection in the production process, effective control and improve product quality, reduce product defect rate, improve labor productivity, has very important practical significance for steel processing enterprises.

目前钢板表面缺陷检测的方法，主要有传统的无损检测和现代的机器视觉技术。其中，无损检测技术主要有涡流检测技术、红外检测技术和漏磁检测技术等。但是，由于这些技术方法并非十全十美，有的还存在各种不同的缺点，比如检测精度低、检测速度慢、无法对缺陷进行分类、缺陷漏检率高、现场安装条件苛刻等，因此并不能完全满足高速轧制带钢表面质量检测的要求。

At present, the methods of surface defect detection of steel plate mainly include traditional nondestructive testing and modern machine vision technology. Among them, nondestructive testing technology mainly includes eddy current testing technology, infrared detection technology and magnetic flux leakage testing technology. However, because these methods are not perfect in every respect, some also have various shortcomings, such as low precision, slow detection speed, unable to defect classification, defect detection rate is high, on-site installation conditions, and therefore can not fully meet the surface quality requirements of high-speed rolling strip detection.

随着CCD(电荷耦合元件)技术、图像处理技术，尤其是计算机技术的飞速发展，机器视觉技术也迅速发展，使钢板表面质量在线检测成为可能。

With the rapid development of CCD (charge coupled device) technology and image processing technology, especially computer technology, machine vision technology is developing rapidly.

这种在线检测系统可在生产线正常运行的条件下实时、高效地检测出钢板表面的各类缺陷，通过统计分析并参照产品质量等级评定标准，评估出单个或批量产品的质量状况，并提供给工厂质量控制部门，作为其决策的依据。同其他检测技术相比，具有很大的优越性。

The online detection system in the production line running under the condition of real-time and efficient to detect various types of defects on steel plate surface, through statistical analysis and reference standard for grading the quality of products, assess the quality from single or batch of products, and provide the factory quality control department, as the basis for decision-making. Compared with other detection techniques, it has great advantages.

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