基于尺寸公差和图像处理的刹车片尺寸检测

发布时间：2018-12-10 18:43

【摘要】：刹车片尺寸检测是刹车片质量的重要指标之一。为了快速综合检测刹车片尺寸,提出了基于公差设计原则和图像处理的综合尺寸检测方法。首先根据图纸要求利用尺寸公差设计原理逆向设计刹车片尺寸允许公差控制带,作为综合尺寸检测标准模板图;其次,利用CCD相机采集待检刹车片图像以及进行滤波、二值化处理,得到二值图像并利用最小外接矩形优化算法确定其放缩倍数,得到与标准模板图相同的像素尺寸标准的实际图;最后利用实际图与标准模板图两圆心坐标连线中点位置截图相同大小的两幅图,并且将实际图进行边缘检测得到实际轮廓图,然后将实际轮廓图与标准模板图进行加法运算,利用白色像素点数与标准模版图白色像素点数差异得到检测结果。实验结果表明,检测精度可达到1个像素尺寸,检测速度5 s一片,并且可以检测出刹车片所有待检尺寸是否合格。
[Abstract]:The size measurement of brake pad is one of the important indexes of brake pad quality. In order to measure the size of brake pad quickly and synthetically, a method based on tolerance design principle and image processing is proposed. Firstly, according to the drawing requirements, the design principle of dimension tolerance is used to reverse design the tolerance control belt of brake pad, which can be used as the standard template for comprehensive dimension measurement. Secondly, the CCD camera is used to collect and filter the image of brake pad to be checked, then the binary image is obtained and the scaling multiple is determined by using the minimum external rectangle optimization algorithm. The actual picture of pixel size standard which is the same as the standard template diagram is obtained. In the end, two images with the same size of midpoint screenshots are used in the connection between the actual and the standard template, and the actual contour is obtained by edge detection, and then the actual contour and the standard template are added. The detection results are obtained by using the white pixel number difference between the standard template and the white pixel number. The experimental results show that the detection accuracy can reach 1 pixel size, the detection speed is 5 s, and all the dimensions of the brake pad can be detected.
【作者单位】：中国计量大学质量与安全工程学院;中国计量大学计量测试工程学院;杭州市质量技术监督检测院;
【分类号】：TP391.41;U463.55

【相似文献】