基于线结构光的电弧增材制造熔积层三维测量
2018-07-13
作者：李友浩1，张海鸥2，张弓1，韩彰秀1，王卫军1，侯至丞1，徐征1，蔡君义1
单位：1广州中国科学院先进技术研究所机器人与智能装备中心；2华中科技大学数字制造装备与技术国家重点实验室
摘要：针对电弧增材制造过程中熔积层形貌信息的实时检测问题，开发了基于线结构光的熔积层形貌三维测量系统。建立了测量系统的数学模型，利用MATLAB标定工具箱并采用锯齿靶标法，得到测量系统的内外参数；将自适应阈值法与灰度重心法相结合，优化激光线条纹中心提取算法；通过数控机床的运动实现对熔积层形貌的三维测量。试验结果表明，熔积层形貌三维测量系统高度方向测量误差小于量程的0.4%，配套的三维测量软件能实时将熔积层形貌信息反馈给路径规划软件，为堆铣复合成形提供有效的数据支持。
关键词：电弧增材制造；三维测量；线结构光；熔积层形貌
中图分类号：TG24；TH162文献标志码：A
3D Measurement of Deposition Layer of Arcbased Additive Manufacturing
Based on Linestructured Light
Li Youhao，Zhang Haiou，Zhang Gong，Han Zhangxiu，Wang Weijun，
Hou Zhicheng，Xun Zheng，Cai Junyi
Abstract:A 3D measurement system is built based on linestructured light to monitor the deposition process on time.The CMOS’s parameters are calibratedby using tool box in MATLAB.A welldesigned jagged part is used to calibrate the rotation matrix and translation matrix.The graygravity algorithmis improved with adaptive threshold method.The whole deposition shaping part is scanned by following the movement of CNC machine to collect 3D size information.The result shows that the 3D measurement system has high precision that the measurement error in Zdirection is less than 0.4% of the range.A software is developed to feedback deposition shaping part′s 3D size information to path planning system and generate the milling code and adjust deposition path of next layer.
Keywords:arcbased additive manufacturing；3D measurement；linestructured light；deposition layer