论文部分内容阅读
提出了一种基于光学三角原理的物体形貌测量方法。从理论上推导出了被测点的相对高度与像点距离的线性公式,通过这个公式可以由像点距离计算出被测点的高度。在实际的测量系统中,通过工作台的精确位移和像点的移动距离可标定出线性公式中的未知系数。把被测物体放在工作台上,先测出被测点的像的相对位移,然后再通过公式计算出被测点相对屏幕的距离。试验中测量了一个圆柱体上的一些点的三维坐标,通过这些数据绘出了圆柱体的三维形貌。
A method of measuring the topography of objects based on optical triangulation is proposed. The linear formula of the relative height of the measured point and the distance of the image point is deduced theoretically. By this formula, the height of the measured point can be calculated from the distance of the image point. In the actual measurement system, the unknown coefficient in the linear formula can be calibrated by the exact displacement of the workbench and the moving distance of the image point. The measured object on the workbench, the measured point of the first measure of the relative displacement of the image, and then through the formula to calculate the measured point relative to the screen distance. The experiment measured the three-dimensional coordinates of some point on a cylinder and used these data to plot the three-dimensional shape of the cylinder.