Currently in the traditional industrial production, sand defect detection is mainly rely on workers eyes visual, measuring the size with the defect rulers.

目前在传统工业生产中，为保证砂纸的质量，主要是依靠工人眼睛目测、钢尺测量缺陷的大小。

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This paper analyzes the system of the online measuring of sand defect Image acquisition, determine the camera and light in the sand defects detection equipment and complete set of hardware.

本论文分析了砂纸缺陷在线检测系统中图像采集的摄像机和光源，确定了针对砂纸缺陷检测的硬件设备并完成了搭建工作。

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By setting chills on the defect locations to isolate the molten iron in those areas from contact with the resin sand, the defects were successfully avoided.

在容易产生这种缺陷的部位设置冷铁，使该部位不与树脂砂接触，因而能避免上述缺陷产生。

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