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中文摘要：
针对具有复杂型面的叶片类零件检测中所面临的数字化测量问题，提出了一种复合式的测量原理与方法。分别采用接触式的电感原理和非接触式的激光三角原理测量叶片的叶根基准以及叶身型面，并基于此原理设计研制了叶片型面四坐标测量系统。研究中结合该系统的机械结构特征，对影响其测量精度的各项几何误差进行了系统的分析，并提出了基于激光干涉测量的误差提取与补偿方法。实验结果表明，应用提出的误差分析与补偿方法可有效获取叶片型面四坐标测量系统的几何误差并显著提高其测量精度。
英文摘要：
The high-accuracy measurement of complex airfoil surfaces is a critical issue in the inspection of blades. Aiming at this problem, a compound measuring principle is proposed in this paper. Using the princi- ple, the airfoil surface and root datum of a blade are measured based on contact inductance method and non-contact laser triangular method, respectively. And a four-coordinate measuring system is designed and established. Then, on the basis of the mechanical structure of the measuring system, the geometric error of which is analyzed syste-matically. And a corresponding extraction and compensation method is proposed based on the laser interferometry. The experimental results show that the proposed error analysis and compensation methods can improve the accuracy of the four-coordinate measuring system effectively.
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