| 双镜面面形测量系统的全局优化标定方法 |
| Global optimized calibration method for double-specular-surface shape measurement system |
| 投稿时间：2025-05-15 修订日期：2025-05-24 |
| HTML 查看/发表评论 下载PDF阅读器 |
| 中文摘要: |
| 为实现双镜面物体完整三维面形的高精度测量，建立了双镜面面形测量系统，提出一种全局优化系统标定方法，提高测量系统的参数标定精度。首先，设计了双镜面面形测量系统，采用两个无公共视场的直接相位偏折测量子系统完整覆盖双镜面物体的被测视角；然后，采用传统方法进行子系统的深度标定、横向标定和子系统测量基准间的标定；接着，基于高精度双镜面标定物优化初始参数，引入三个度量误差来评估标定物的三维测量精度，通过最小化所定义的度量误差，计算出最佳标定参数；最后，搭建实验系统，采用所提全局优化系统标定方法进行标定，测量高精度双镜面量块，得到量块两表面间距离的均方根误差为34 μm。根据测量结果可知，本文所提全局优化标定方法可实现双镜面面形测量系统对于双镜面物体完整三维面形的高精度测量。 |
| 英文摘要: |
| To achieve high-precision measurement of the complete three-dimensional (3D) shape of double-specular-surface objects, a double-specular-surface shape measurement system has been established and a global optimization method for system calibration proposed to improve the calibration accuracy of the measurement system. Firstly, the double-specular-surface shape measurement system is designed using two Direct Phase Measuring Deflectometry (DPMD) subsystems without overlapping Field-of-View (FoV), which fully covers the measured FoV of the double-specular-surface object. Secondly, traditional methods are applied for depth calibration, lateral calibration of each subsystem, and calibration of the transformation between the measurement references of the two subsystems. Thirdly, a high-precision double-specular-surface calibrator is employed to optimize the initial calibration parameters. Three measurement errors are introduced to evaluate the 3D measurement accuracy of the calibrator. By minimizing the defined measurement errors, the optimal calibration parameters are calculated. Finally, an experimental system was built and calibrated using the proposed global optimization method. A high-precision double-specular-surface measuring block was measured, achieving a root mean square error of 34 μm in the distance between the two surfaces. The experimental results demonstrate that the proposed global optimization calibration method enables high-precision measurement of the complete 3D shape for double-specular-surface objects. |
|
| 中文关键词: 双镜面 直接相位偏折测量 系统标定 全局优化 |
| 英文关键词:double-specular-surface direct phase measuring deflectometry system calibration global optimization |
| 基金项目:国家自然科学(U2341275,52075147)；河北省教育厅科学研究项目(JZX2024021)；河北工业大学创新研究院(石家庄)石家庄市科技合作专项基金(SJZZXA24008),国家自然科学基金项目（面上项目，重点项目，重大项目） |
| DOI： |
| 引用本文： |
| 关闭 |
