基于三维投影矩阵的生产流水线对接系统平台构建

Construction of production line docking system platform based on three-dimensional projection matrix

针对工作台扭摆会导致机械加工对接产生误差,提出基于三维投影矩阵构建生产流水线对接系统平台,以降低对接误差。三维运动平台采用脉冲信号控制的步进电机进行驱动,达到机床限位控制;通过控制激光器开关和控制激光器的输出功率实现系统的激光控制;通过多普勒频差测量位移技术,采用交流前置放大器替换常规直流放大器等,获取精准实时测量数据;根据三维立体视觉校对原理提取对接区域图像特征点,依据特征点校验机械加工平台三维对接图像时,采用Powell方法求解三维阶段投影矩阵对接目标函数最小值,实现机械加工的高精准度对接。结果表明:机械加工对接的最大相对误差为1.50%,精准度高,进行机械加工耗时18~23 min,花费时间较短。

Due to the problems of torsion and swing of worktable in food machinery processing enterprises,errors happen to the docking in the mechanical processing.Therefore,a platform for the production line docking system,based on three-dimensional projection matrix,was designed to proposed to reduce docking error.Firstly,the three-dimensional motion platform of the system adopted a stepping motor controlled by pulse signal to achieve the limit control of machine tool.Secondly,the laser control of the system was realized by controlling the laser switch and the output power of the laser.Thirdly,the displacement measurement technology of Doppler frequency difference was adopted,and the AC front-end was also applicated.The amplifier replaced the conventional DC amplifier to obtain accurate real-time measurement data.Finally,the feature points of the docking area image were extracted by the system software,according to the principle of three-dimensional stereo vision proofreading.When checking the three-dimensional docking image of the machining platform based on the feature points,the minimum value of the docking objective function of the three-dimensional phase projection matrix was solved by Powell method,which realized the high precision docking of the mechanical processing.The results showed that the maximum relative error of mechanical docking was 1.50%,with a high accuracy and a quick performance,and only 18~23 minutes was needed.