吊装过程中为获取吊物具体位置信息,设计了一种基于线阵CCD的二维轮廓扫描系统.利用激光照射直线与线阵CCD投影直线相交的原理求取激光照射点二维坐标;提出了一种基于硬件的线阵CCD脉冲中心位置测量方法;采用双直线法对线阵CCD进行标定,得到其输出像素坐标与投影直线的映射关系;研究提出了一种升降速控制策略,能平稳高效地控制步进电机.用已知尺寸的圆柱形PVC管作为实验对象,系统测得其二维轮廓若干离散点坐标,通过圆周拟合的方式得到圆柱半径,平均误差为0.928 mm,系统一次扫描耗时约0.45 s;实验结果表明,系统测量精度较高,扫描速度较快,可广泛应用于物体的二维轮廓扫描.

In order to obtain the specific location information of hanging objects in the lifting process,a 2D outline scanning system based on linear CCD was designed.The principle that laser line and linear CCD projection line must intersect was used for getting the 2D coordinates of laser irradiation.A linear CCD pulse central position measurement method based on hardware was proposed,and double line method was used for linear CCD calibration to obtain the mapping relationship between the output pixel coordinates and projection line.A speed control strategy was presented for smooth and efficient control of stepper motor.A cylindrical PVC with known size was taken as the experiment object,and was measured by the system for coordinates of some discrete points of the 2D contour.The cylinder radius was obtained by fitting circle with an average error of 0.928 mm,and one scan took about 0.45 s.The results show that the system has a high measuring accuracy,fast scanning speed,and can be widely applied to 2D contour scanning of objects.