论文部分内容阅读
为了对水下物体进行高速度、大范围的三维测量,提出了水下线结构光自扫描三维测量技术。采用振镜将激光面反射到被测空间,激光面与被测物体相交形成光条并被摄像机拍摄,根据像面上光条中每一点的位置计算出该点由于折射产生的偏移大小并加以补偿。再利用考虑折射后的光平面水中部分在振镜坐标系下的方程,求出物体表面的三维坐标。实验结果表明,所提出的水下自扫描系统模型及水下三维测量方法可行,在深度为0.5~1 m,测量高度为0.5 m,测量宽度为0.6 m的空间内测量精度达到0.7 mm。
In order to carry out high-speed, large-scale three-dimensional measurement of underwater objects, a three-dimensional underwater self-scanning measurement technique for underwater structures is proposed. The laser surface is reflected by the galvanometer to the measured space, the laser surface and the measured object intersect to form a light bar and is taken by the camera, and the offset caused by the refraction is calculated according to the position of each point in the light bar on the image surface Be compensated. Then, taking into account the refraction of the light plane part of the coordinate system in the galvanometer coordinate system, find the three-dimensional coordinates of the surface. The experimental results show that the proposed underwater self-scanning system model and underwater three-dimensional measurement method are feasible. The measurement accuracy reaches 0.7 mm in the depth of 0.5 ~ 1 m, the measurement height of 0.5 m and the measurement width of 0.6 m.